Which of the following describes a positron emission tomography (PET) scanner? 1: A device that uses magnetic fields to produce images of brain structures 2: A device that uses magnetic fields to measure blood flow 3: A device that uses radioactive fluid to determine the active areas of the brain 4: An X-ray device that can create a 3D model of the brain

Answers

Answer 1

Answer:

3: A device that uses radioactive fluid to determine the active areas of the brain

Explanation:

A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.


Related Questions

What is the correct order of organization in animals?
A. Organ, organ system, cell, tissue, organism
B. Cell, tissue, organism, organ, organ system
C. Tissue, cell, organ, organ system, organism
D. Cell, tissue, organ, organ system, organism

Answers

d is the answer.



cells make up tissues and and tissues make up organs organs make up organ systems and organ systems (skin lungs intestines..) make up organisms:)

The correct order of organization in animals is Cell, tissue, organ, organ system, organism—that is what is written in the option D. The cell is the first to form, followed by tissue, and finally organs and organ systems.

What is the organization of an animal?

At the early stage, unicellular individuals were seen, and later, due to development, multicellular individuals were developed. The unicellular organism has only cells, then those cells unite to make a tissue, and in a tissue all the cells have the same function. An example is epithelial tissue, which is made up of many epithelial cells.

Tissues combine to form an organ, and organs combine to form an organ system. An example is an organ such as the liver that is made up of many tissues, but all tissues perform certain functions that are required for the liver, and in the same way, the organ system and the organism are developed.

Hence, the correct order of organization in animals is cell, tissue, organ, organ system, organism—that is what is written in the option D.

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Examine the following diagram. Place the labeled layers in order from youngest to oldest.

Public Domain

A, B, C, D
C, D, B, A
D, A, B, C
C, B, A, D

Answers

Answer:

C, D, B, A

Explanation:

Got it right on the quiz. Also the definite order would be that D HAS to be before A and B and only the second option has that since C is lava which is the most recent.

An investigation is an example of_____.
A. inquiry
B. pseudoscience
C. the scientific method
D. bias​

Answers

Answer:

C) the scientific method / Maybe A) depending on teacher..

Explanation:

A) inquiry - an act of asking for information.

B) pseudoscience - a collection of beliefs or practices mistakenly regarded as being based on scientific method.

C) the scientific method - a method of investigation in which a problem is first identified and observations, experiments, or other relevant data are then used to construct or test hypotheses that purport to solve it.

D) bias​ - prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.

please answer the question​

Answers

Answer:

two of the DNA fingerprint are same when they contain the same nitrogenous bases in the same location of the DNA.

Explanation:

The DNA fingerprint is one of the most important tool as a forensic medicine expert to to form such condition and rule it out to come to a diagnosis.

DNA fingerprint uses the base pair which a different for all the other human beings. Due to this from the blood or other cells of the body there can be an evidence of the person and this is usually done on a comparative basis.

To know more about DNA fingerprint,

what is DNA fingerprinting? - Brainly.in

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Witch statement correctly compares the “analysis” and “conclusion” section of a lab report

Answers

Answer:

Analysis section of lab report comprises of making comparisons while Conclusion section is used to make further research about the experiment.

Explanation:

Analysis section of lab report comprises of making comparisons between specific data. After knowing the scope and objectives of the experiment, data is collected either by performing the experiment or adopted data from other organization such as hydrological data obtained from hydrological agency, analysis of such data comprises of making comparisons.

While

Conclusion section is used to make further research about the experiment. It is used to report the outcome of the result and also to determine other possibilities of results from the experiment.

can DNA be extracted from dead cells

Answers

The short answer is yes. Based on your DNA, your body is better suited for some foods than others. This company found that 45% of people’s genes need a high carb diet, 47% need moderate and only 8% need low.

Hope this helped! <3

Plants are autotrophs because they can prepare their own food. Photosynthesis takes place in leaves. Leaves contain that allow for the exchange of gases during the process, and also help with the process of

Answers

Leaves contain stomata that allow for the exchange of gases during the process, and also help with the process of transpiration.

What is photosynthesis?

Photosynthesis is the process by which green plants manufacture their own food in the presence of sunlight.

Factors that affects photosynthesis are:

Presence of sunlightStomata, which controls the rate of gas exchange in plant

Thus, leaves contain stomata that allow for the exchange of gases during the process, and also help with the process of transpiration.

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Answer:

Stomata and Transpiration on edmentum

Explanation:

A mutation in human ATPase 6, which corresponds to E. coli subunit a, from leucine to arginine at position 156 may allow the movement of protons across the membrane, but not the rotation of the ring of c subunits. How might this possible mechanism affect the function of ATP synthase

Answers

Answer:

H+ protons will not be delivered from the cytoplasm towards the extracellular side of the cell membrane

Explanation:

ATP synthases are enzymes that catalyze the hydrolysis of phosphate bonds in the adenosine triphosphate (ATP) or the formation of ATP from adenosine diphosphate (ADP) and phosphate. The hydrolysis of ATP produces the rotation of a ring composed of six or more structurally different ATPase C subunits. The rotation of this ring enables the delivery of H+ protons towards the extracellular membrane surface and this gradient is used to generate energy by producing ATP. In consequence, when the ATPase ring can not move, H+ will accumulate in the cytoplasm, the proton gradient through the membrane will not occur, and ATP will not be produced.

Identify the interaction used to describe each type of interdependence among organisms. _______Having too many fish in a pond can limit the amount of food and space available. _________ The cheetah population depends on the gazelle population for food the answer choices are predation and competition

Answers

Having too many fish in a pond can limit the amount of food and space available is Commensalism.

The cheetah population depends on the gazelle population for food  Mutualism.

What are the three major types of interactions among organisms?

There are 03 main types of interchange among organisms:

Competition, Predation, and Symbiosis.

Thus, Commensalism and Mutualism is the correct answer.

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Answer:

Identify the interaction used to describe each type of interdependence among organisms.

✔ competition

Having too many fish in a pond can limit the amount of food and space available.

✔ predation

The cheetah population depends on the gazelle population for food.

Given the relationships identified above, determine what would happen to the populations under the following circumstances.

✔ increase

If the cheetah population decreases, what would happen to the gazelle population?

Explanation:

Which would have a bigger effect on an organism, an error during transcription or a point mutation?

Answers

Answer: Point mutation would have a bigger effect on an organism.

Explanation:

Which best explains a desirable outcome for energy efficiency? A) a low second law efficiency due to use of a low efficiency furnace B) a high second law efficiency due to use of a low efficiency furnace C) a high second law efficiency due to use of solar panels on the house D) a low second law efficiency due to use of solar panels on the house

Answers

Answer:

C. a high second law efficiency due to use of solar panels on the house.

Explanation:

Second Law efficiency is the rational efficiency that computes the effectiveness of the system relative to its performance. The efficiency measure is the increase in output with the same level of input. Energy efficient system are high second law efficiency. They save electricity and use alternative sources like, solar panels, wind energy and others.

answer answer answer answer

Answers

Answer: C

Explanation: Amoeba use pseudopods to move around and people use feet to move.

Answer:

The answer is C

what action is a reflex action

Answers

Answer:

A reflex action is an involuntary , quick  response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot.

Explanation:

Tara placed a grape in a solution, after sometime she noticed that the grape started to shrink.
a. Name the solution and explain.
b. Then Tara placed the raisin in a solution and noticed it started to swell up. Name the solution and explain

Answers

Answer:

a. Hypertonic solution

b. Hypotonic solution

Explanation:

There are basically 3 types of solutions in biology,

1) Isotonic-Same concentration of solute and solvent inside  the grape and in the solution.

2)Hypotonic solution-More concentration of solvent in the solution than in the grape.

3)Hypertonic solution-More concentration of solvent in the grape than in the solution.

Now,

a. Tara had kept the grape in a hypertonic solution. The solvent will start draining from the grape to equalize the concentrations of solvent inside and outside. So, the grape shrank due to loss of water.

b. Tara kept it in a hypotonic solution. The solvent will start entering the grape to equalize the concentrations of solvent. So, the grape started swelling.

Look at the DNA sequence (1st Picture) Which sequence shows a substitution mutation? (2nd Picture)

Also, can you explain how you got the correct answer?

Answers

Answer:

Sequence A

CGTTACTGCAAT to CGTGACTGCAAT

Explanation:

Mutation refers to any change, whether big or small, that occurs in the nucleotide sequence of a DNA/gene. This change can either be caused by replicational errors or induced by mutagens. Mutation can be of different types depending on the effects on the affected organism (mutant).

A substitution mutation is a kind of mutation in which one or more nucleotide base is replaced by another in a sequence. This is the case here as the

original sequence: CGTTACTGCAAT

Mutated sequence: CGTGACTGCAAT

The fourth base, T has been replaced by G in the upper strand of the DNA sequence.

Gene Expression Quick Check

Explanation:

1.DNA and RNA hold the code to create proteins that are the key to gene expression.

2.Endoplasmic Reticulum

3.CGTTACTGCAAT to CGTGACTGCAAT

4.The proteins are expressed differently in each cell.

5.mRNA is translated into amino acids.

You are given an unknown animal to study in the laboratory. It is long and ribbonlike and appears to have some repeating units. You find it has three tissue layers, it does not have a digestive tract, and it has male and female reproductive structures in the same individual. This animal probably is __________.

Answers

Answer:

I reckon it's a tapeworm.

Explanation:

Answer:

tape worm

Explanation:

tape worm has all of the characteristics that have been described

A possible answer to a scientific question that can be tested is a

Answers

The key to a good and manageable investigation is to choose a topic of interest, then ask what is called a “testable question.” Testable questions are those that can be answered through hands-on investigation by the student.

You are studying lipoprotein processing in a strain of mutant mice. You find that these mice synthesize the same apolipoprotein composition contained in lipoproteins made in the liver and the intestines, whereas, in wild-type mice there are 2 different sized apolipoproteins in these same tissues. Examination of the mRNA processing in the mutant mice would most likely show a defect in which of the following processes?A. alternative polyadenylationB. alternative splicingC. differential cappingD. posttranscriptional modification converting a U to a T residueE. RNA editing

Answers

Answer: Option E -- RNA Editing

Explanation:

It should be noted that, RNA editing can be defined as a molecular process via which some cells can make discrete changes to specific nucleotide sequences within an mRNA molecule after it has been generated by RNA polymerase. In addition, we have two major types of RNA editing with 1 being a C-to-U change catalyzed by cytidine deaminase that deaminates a cytidine base into a uridine base, e.g C-to-U editing is with the apolipoprotein B gene in humans. ApoB-100 is expressed in the liver and apoB-48 is expressed in the intestines. The B-100 form comprises of a CAA sequence that is edited to UAA, a stop codon, in the intestines.

Farming, grazing of livestock, mining, and drilling combined account for: Over 1/2 of deforestation About 1/3 of deforestation 3/4 of deforestation All of deforestation

Answers

Answer:

Over 1/2 of deforestation

Explanation:

Farming, grazing of livestock, mining, and drilling combined account for Over 1/2 of deforestation or more than half of deforestation.

These are few of the major causes of deforestation which is continuously destroying forests and wildlife that leads to global warming.

Forests are destroyed for farming purposes, overgrazing by cattles, urbanization of forests in industries and towns, mining, and drilling should be controlled to save deterioration of the earth.

Hence, the correct answer is "Over 1/2 of deforestation ".

which promotes a more substainable use of resource

Answers

Environmental sustainability doesn't mean living without luxuries but rather being aware of your resource consumption and reducing unnecessary waste.
Reduce household energy use. ...
Eat locally. ...
Dispose with disposables. ...
Plant seeds. ...
Recycle. ...
Resell and donate items. ...
Drink from the tap. ...
Save water.

Answer:

Decreasing overconsumption

Explanation:

During the last years, environmental concerns have increased due to high levels of contamination and destruction of ecosystems. In response to this situation, a worldwide movement has emerged that promotes environmentally friendly practices that aim at reaching sustainability. The term "sustainability" refers to a global trend to find the balance between the conservation of nature and the use of natural resources; one of the most important principles to achieve this is to reduce consumption; this leads to a decrease in the negative impact of human societies as fewer resources are taken from nature and thus, ecosystems are preserved. So, the correct answer is decreasing overconsumption

Metamorphosis is:______.a. changing of one body form to another within a species, such as the change from an aquatic tadpole to a terrestrial frog. b. an intermediate condition, such as length of legs in mice between longer legs of some mice and shorter legs in others, a condition caused by Hox genes. c. the evolutionary transition from fishes to amphibians. d. the developmental changing of a scale to a feather.

Answers

Answer:

changing i think

Explanation:

what are sex hormones?why are they named so? state their function.

Answers

Answer:

Sex hormones or hormones of the reproductive organs are certain cells in the reproductive organs that produce hormones.

The testis produces testosterone,the male sex hormone,and the ovaries produces oestrogen and progesterone, the female sex hormones.

In a sexually mature male,testosterone influences sexual behaviour, and together with FSH,regulates sperm production in the seminiferous tubules of the testes.

Sexually matured females undergo a regular 4-week reproductive or menstrual cycle during which a mature egg is released.This cycle is regulated by oestrogen and progesterone. During pregnancy, progesterone inhibits egg production (ovulation),brings about the development of the placenta and prevents the uterus from contracting....I hope this answers your question... Thank you for the question.

I have four brothers
"This is what type of
observation?

Answers

Quantatative data since it is physically counting

If a vaccine protects you for most of your life against a particular pathogen, why do you need a new flu shot every year? A. Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine won’t recognize it. B. Influenza is so strong that you need a booster every year to make sure your body can fight it. C. Influenza is a virus, and vaccines only generate memory cells for bacterial infections. D. You don’t need it every year, it is just offered every year for anyone who does not have it yet.

Answers

Answer:

If you got a flu shot this year, next year you'll need it again.

Explanation:

This is because the virus changes, usually rendering the previous year's vaccine partly or totally useless. hope this helps you :)

Answer:

A.

Explanation:

Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine won’t recognize it.

The 2020 influenza vaccine was not as efficient because scientists were scrambling to put out a vaccine for Coronavirus. Consequently, Coronavirus cases skyrocketed during the flu season.
Hope this helped!

also.. i have to put coronavirus and not "c0vid-19" because apparently it's too political. lol.

Describe the direction of DNA replication. Why is that important?

Answers

Answer:

DNA replication is the process by that DNA make a copy to the cell division.

Explanation:

DNA replication is the double structure to the DNA molecule,it is biological process.DNA replication molecule the serve that template for the production to referred conservative replication.DNA replication occurs living the biological property of division and they performed complementary stand.DNA replication to that begin the specific location and origins in the genome, and growing from the origin.DNA replication is performed to the outside and artificially to the cell,in the DNA molecule.DNA replication is single strand by the DNA chain of nucleotide function, DNA contain the sugar .DNA replication is the basis of single strand to 3 prime and 5 prime  end, these refer to the carbon atom in the chain attaches.DNA replication allow the strand to the one another strand to used in partner strand.DNA replication is to matched in the template strand at one time with the creation of bonds,they high energy bonds.  

WILL GIVE BRAINLIEST AND POINTS!!!!!!! How long can we survive on each planet of the solar system without a spacesuit?

Answers

Answer:

about 80 days

Explanation:

the time period of survival is roughly a second, even though the gravity force is equal to that of Earth (the more you know!) Without holding our breaths, or donning any kind of spacesuit, we can survive for about 80 years

here are times where you will be provided with BUD dates. When you do not have access to the BUD dates, you will have to determine that date yourself. What is the appropriate BUD date for a water containing oral formulation? Not later than 14 days Not later than 30 days

Answers

Answer:

Explanation: Not later than 14 days.

Beyond Use Date (BUD) is the date after which a compounded sterile preparation may not be stored or transported. This time is calculated from the date of compounding, and it is different from expiration date. This is because the BUDs are assigned with a different approach from those applied to assigning expiration dates to  manufactured drug products. Also, compounded preparations are intended for administration following short-term storage. So, the BUD is the date after which a compounded preparation shall not be  used. A reliable BUD is established to ensure that the preparation  has an accepted quality and purity at least  until the labeled BUD.

BUD is calculated by:

Type of container in which it is packagedHow long the medication will be takenType of drugHow fast is the drug degradatedStorage conditionsDosage of the medicationNature of the drug and its degradation mechanism Potential for microbial proliferation in the preparation

For Nonaqueous Formulation, the BUD is not later than 6 months or the time  remaining until the earliest expiration date of any API (Active pharmaceutical ingredient), whichever is earlier.  

For Water-Containing Oral Formulation, the BUD is not later than 14  days when it is stored at controlled cold temperatures.

For Dermal and Mucosal Liquid, Semisolid Formulations/Water-Containing Topical, the BUD is not later than 30 days.

How much time is required for a P-wave to travel 6,000 kilometers?

Answers

Answer:

294.1 minutes

Explanation:

5,882 seconds (98 minutes) to travel 2,000 km.

2,000 x 3 = 6,000

5,882 seconds x 3 = 17,646

(294.1 minutes) to travel 6,000 km

The __________ is a layer of cells that surrounds an axon and helps to accelerate the transmission of information. a: soma b: nerve c: myelin sheath d: axon terminal

Answers

Answer:

C: myelin

Explanation:

its the substance that surrounds nerve cell axons

A group of coordinately regulated structural genes with related metabolic functions, plus the promoter and operator sites that control their transcription, is called a/an ___________.

Answers

Answer:

They are called promoter and regulatory genes.

Explanation:

There are different genes responsible for regulating transcription:

These are the inhibitors, promoters and regulators.

Regulatory genes are in charge of regulating that promoter or inhibitor genes remain intact or do not present mutations.

Promoter genes promote cell replication, hence transcription.

In the case of malignant or benign neoplasms, there must be yes or if the affection of a regulatory gene plus the affection of an inhibitory or promoter gene.

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Hi people, Please if someone can give me a hand, l already have done the first part of the exercise, but l cant make Angle CAB= X^0 c) calculate the lower bound for the value of tan X^0 there is the answer 1.02 (2dp) but l have no clue how to get it thanks i used Toa (Tan = Opp/ adj) but l couldnt find it thanks For which system of inequalities is (3,-7) a solution? A. x + y < -4 3x + 2y < -5 B. x + y -4 3x + 2y < -5 C. x + y < -4 3x + 2y -5 D. x + y -4 3x + 2y -5 What is the solution set for StartAbsoluteValue z + 4 EndAbsoluteValue greater-than 15? 11 less-than z less-than 19 Negative 19 less than z less-than 11 z less-than negative 19 or z greater-than 11 z less-than 19 or z greater-than 11 Solve for W.W/9 = g Blake bought two iced coffees from Dutch Bros. He originally had $13.50 and now has $9. Write and solve an equation to find out how much each icedcoffee cost. The three conditions that characterize difficult managerial decisions concerning resources, capabilities, and core competencies are Which phrase best describes the relationship indicates by the scatter plotting? make a list of inventions and achievements made by Gehendra shumsher . Which preposition should be added to best connect the sentence below? Ten chairs were lined up _______ the east wall. Question 6 options: a) pending b) underneath c) along d) This sentence does not need a preposition The digits of a 2 digit number differ by 3. Is the digits are interchanged, and the resulting number is added to the original number, we get 143. What can be the number? Find interval of increase and decrease of f(x) = 8 sin(x) + cot(x), x Calculate:a) QR b) PS c) The area of quadrilateral PQRS On a plane trip, baggage over 40 pounds ischarged at the rate per pound of 1% of the one-way fare. The charge for a bag weighing 52pounds on a trip where the one-way fare is $98is:HELP PLEASEE!! QUICK!! lab safety test Safety goggles and an apron must be worn when handling chemicals labeled corrosive because they:________. Please answer now question help me plz can i have help Which of the following best describes "overburden"? Drilling underneath layers of rock and soil Rock and soil that is removed to mine ore Reclamation of land from mining ore Residue that is left over from mining ore Find the surface area of the regular pyramid shown in the accompanying diagram. If necessary, express your answer in simplest radical form. Jill paid $36 for calendars marked down $5 apiece from the original price, she could have gotten 5 fewer calendars. How many cards did she buy What is the solution to the linear equation?2/5 + p = 4/5 + 3/5p