The question provided is not complete as it lacks the group of choices, however the group of choices are given as follows:
A. A contraction fails to occur because an action potential is not generated in the muscle cell.
B. A contraction fails to occur because this toxin directly prevents ion release from intracellular stores.
C. A contraction fails to occur because neurotransmitter release by the motor neuron is blocked at the neuromuscular junction.
D. A contraction fails to occur because this toxin prevents cross bridge formation and thereby directly prevents contraction.
E. C and D are both true
Answer:
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
Explanation:
A muscle contraction takes place when action potential bring to muscles by nerves, which is traveled with the help of motor neuron and imitated the muscle contraction.
Acetylcholine or Ach is a chemical messenger to bring the nerve impulses between a nerve and a muscle. If the receptor is block with applying toxin muscle will not contract as ACh will not be able to propagate the nerve impulse to the muscle so there will be no action potential.
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
Which of the following group behaviors is primarily offensive, rather than defensive?
Answer:
Abusive behaviour, Discrimination or harassment are offensive.
Explanation:
Abusive behaviour, Discrimination or harassment are the behaviour which is offensive not defensive because in these behaviour people show aggression towards other people which is offensive in nature. These behaviour should be avoided because these behaviours hurt people and disturbance occurs in the society. These types of behaviour shows true color of the individual and the family he belong.
write five example of bodies which are at rest
Answer:
1. A person sitting on a chair.
2. Water in a bucket.
3. Bus without a driver.
4. Electric fan without electricity.
5.Car without engine.
Lisa is working on a science project. Her task is to
answer the question: "Does fluoride (which is a
commercial hair product) prevent cavities?". Her
family is willing to volunteer for the experiment.
11. Describe how Lisa would perform this experiment. Identify the control group, and the independent variables in your description
Answer:
The fluoride is what helps you avoid cavities
Explanation:
water fluoridation as safe and effective in preventing tooth decay for both children and adults
What factor about cellular respiration are you testing? ( what makes the three bottles different?)
Answer:
Gas.
Explanation:
Gas which is present makes the three bottles different from one another. There are three factors which is used for testing of cellular respiration such as amount of oxygen consumed during this process, amount of glucose used and amount of carbondioxide produced during cellular respiration. During cellular respiration, oxygen used in order to break down glucose and releases high amount of energy with the waste materials such as carbondioxide gas.
In a cladogram (a type of phylogenetic tree), clades are groups of related organisms. In the past, phylogenetic lists built clades using the idea of parsimony, that the pattern that uses the fewest evolutionary changes is the most likely to be correct. Today, with the use of computers and DNA sequences, the explanation that is thought to be the best is ___________ .
Answer:
one with the fewest number of genetic differences in the nucleotide sequence.
Explanation:
A cladogram is a diagram capable of showing the relationships among different species and/or group of organisms. In a cladogram, the root indicates the common ancestor, while internal nodes represent the common ancestors of each group. In consequence, this diagram can be used to establish evolutionary relationships in which the start branch points represent common ancestors shared by the organisms found in the 'branches'. Nonetheless, the length of the branches in the cladogram does not represent evolutionary distances among groups. In recent years, cladograms based on DNA sequencing data have been combined with morphological data to establish evolutionary relationships among species.
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
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.
Which of the following is not an example of energy transformations in an ecosystem?
a. sunlight driving photosynthesis in plants
b. herbivores feeding on plants
C. predators feeding on herbivores
d. none of the above
Answer:
d. none of the above
Explanation:
Energy, which refers to the ability to do work, can exist in different forms. The process of changing energy from one form to another is called TRANSFORMATION OF ENERGY. In an ecosystem, all organisms require energy in order to perform their life processes. They acquire these energy in different forms and convert it to a usable form by their cells (chemical energy) in ATP.
For example, solar energy in Sunlight is used by plants to drive their photosynthetic process and change it to chemical energy in glucose. Also, predators and herbivores feeding on herbivores and plants respectively converts one form of energy to another. Hence, all options are examples of energy transformation. None of the above is the correct answer.
Answer:
I think the correct answer is d ,
because all of them are an example of energy transforming in an ecosystem.
Hope this helps you guys!!!!!!
:)In response to increased levels of aldosterone, the kidneys produce In response to increased levels of aldosterone, the kidneys produce urine with a lower concentration of sodium ions. urine with a higher concentration of sodium ions. urine with less glucose. a larger volume of urine. urine with a lower concentration of potassium ions.
Answer:
The correct answer is urine with a lower concentration of sodium ions.
Explanation:
A hormone produced in the cortex or the outer section of the adrenal glands, which are located above the kidneys is known as aldosterone. The hormone plays an essential function in regulating the blood pressure primarily by functioning on the organs like colon and kidney to enhance the reabsorption of sodium or salt into the bloodstream and to enhance the concentration of potassium excreted in the urine.
Along with sodium, the hormone also works to reabsorb more concentration of water, which further increases the volume of blood and thus the blood pressure. Therefore, with the increase in the levels of aldosterone, the kidneys generate urine with a lower concentration of sodium ions.
In response to increased levels of aldosterone, the kidneys produce urine with a higher concentration of sodium ions. Therefore, option B is correct.
Aldosterone is a hormone produced by the adrenal glands, specifically in the zona glomerulosa of the adrenal cortex. It plays a crucial role in regulating sodium and potassium levels in the body.
When aldosterone levels increase, such as in response to low blood sodium levels or stimulation by the hormone angiotensin II. Then, it acts on the cells of the distal convoluted tubules and collecting ducts in the kidneys.
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A week after a near-drowning incident, a 6-year-old boy presents with respiratory distress, tachypnea, and fever. What should you suspect
Answer: I would suspect there was actually something in the water that caused this. Maybe the child swallowed some of the water.
Explanation:
Shown above
Interpreting an Expression Quick Chec How many factors does the expression (17 –r) have? O four O two one three
Answer:
One
Explanation
Studies of topsoil erosion on Iowa farmland shows that as much as 50 metric tons are lost per hectare during winter and spring rains. This loss is due to the loss of millimeters of soil from across the entire surface of the fields. Which type of erosion would this be?
Answer:
The type of erosion described in the question is called Water Erosion.
Explanation:
Note that the erosion is caused by winter and spring rains.
Water Erosion can happen when raindrops disintegrate the aggregates of the topsoil. The fragments collect into the soil pores and create a coagulating action which makes it difficult for the water to penetrate the soil. The rainwater having increasingly accumulated on the surface flows off along with the topsoil.
This type of erosion can be further aggravated if:
the rainfall is very heavy;the terrain has a steep gradient thus increasing the velocity of runoffthe soil type has a lower capacity to erosionCheers!
Ergogenic aids can be useful in some circumstances, some are possibly useful but still under study, and still others are downright dangerous and illegal. 1. human growth hormone.
2. anabolic steroids
3. creatine
4. caffeine
5. beta-hydroxy-beta methylbutyric acid (HMB)
6. branched-chain amino acidsA. The use of_____may improve performance for those who undertake repeated bursts of activity, such as in sprinting or weightlifting.B. Consuming small amounts of_______can increase menta alertness. C. Consuming______may enhance muscle recovery after intense physical activity. D. An ergogenic aid that increases muscle mass but may also cause uncontrolled growth of the heart or other organs and is banned by the International Olympic Committee is______.
Answer:
Using beta-hydroxy-beta methylbutyric acid (HMB) can improve performance for those who perform explosive repetitions of activity, such as running or lifting weights. Consuming small amounts of caffeine can increase mint alertness. C. The consumption of branched-chain amino acids and creatine can improve muscle recovery after intense physical activity. D. An ergogenic aid that increases muscle mass but can also cause uncontrolled growth of the heart or other organs and is prohibited by the International Olympic Committee: anabolic steroids.
Explanation:
In the answer I leave you the text with the blanks completed ... It is also important that you know that amino acids are important for the formation of muscle mass and its recovery, in addition to creatinine.
On the other hand, these supplements are administered in people who have high performance in sports, and accompanied by a good diet and specific diet, otherwise they will not work.
Anabolics are chemical structures that promote energy reserves and anabolism for muscle tissue hypertrophy, but they do not have a selective effect on the skeletal muscle, but rather affect other parts of the body, that is why they are risky, cause heart failure, cardiovascular, liver, kidney, and even possible alterations of the gallbladder.
Which best describes food when it reaches the stomach?
Explanation:
The polysaccharides have been broken down.
In 1937, a man employed to lay water pipes was found to be the source of a severe epidemic of typhoid fever. The man, an asymptomatic carrier of Salmonella enterica serotype Typhi, the bacterium that causes typhoid, habitually urinated at his job site. In the process, he contaminated the town's water supply with bacteria from his bladder. Over 300 cases of typhoid fever developed, and 43 people died before the man was identified as the carrier.
How was this carrier identified?
a) nasal swab
b) sputum sample
c) throat swab
d) urine culture
An organism is _______ for a gene if it has two copies of the same allele for the gene.
The genotype of an organism and the interaction of the genotype with the environment determine the organism’s _______, or observable characteristics.
The law of independent assortment states that the separation of alleles for one gene are independent of that of other genes, unless the genes are _______.
Mendel’s law of _______ governs which allele is expressed in an individual.
Respond to the following based on your reading.
In the previous section, you learned that the allele for brown eyes (B) is dominant, and blue (b) and green eyes (g) are recessive, while green eyes are dominant over blue eyes. What eye color would someone with the following genotypes exhibit? (a) BB, (b) Bb, (c) gb, (d) Bg, (e) bb.
Discuss the law of segregation and explain why each organism has two copies of the gene for each trait expressed.
What type of experiments did Mendel conduct, and what did he want to find out about the heritability of the seven traits he chose to study?
Answer:
1. Purebred (N.B: the exact word is considered a foul word)
2. Phenotype
3. Linked
4. Segregation
5) (a) BB- Brown eyes
(b) Bb- brown eyes
(c) gb- green eyes
(d) Bg- brown eyes
(e) bb- blue eyes
The other questions are explained below
Explanation:
1. A purebred organism is that which possess two copies of the same alleles in its genotype. An allele is a contrasting form of a gene. If the two alleles are the same, the organism is said to be purebred.
2. Phenotype of an organism is the observable characteristics of the organism. It is determined by the organism's genotype in interaction with its environment.
3. Mendel's law of independent assortment states that the alleles of a gene will separate into gametes independently of another gene unless the genes are linked. Linked genes are genes that are too close to each other on a chromosome and hence, do not sort independently. They're rather inherited together.
4. Mendel’s law of Segregation governs which allele is expressed in an individual. According to this law, an organism will express the allele it randomly receives from each parent. If an organism receives two different alleles, it will express the allele that is dominant. In other words, an organism will only express the recessive trait if it receives two recessive alleles from both parents.
5. a) BB- Brown eyes because the organism is purebred for the dominant (brown) allele
(b) Bb- brown eyes because the brown allele (B) will mask the expression of blue allele (b) and express itself.
(c) gb- green eyes because the allele for green eyes (g) is dominant over the allele for blue eyes.
(d) Bg- brown eyes because the brown allele (B) is dominant over the allele for green eyes (g), hence, it will mask its expression
(e) bb- blue eyes because the organism is purebred for the blue allele i.e. same recessive (blue) alleles in the gene.
6. The law of segregation as proposed by Mendel states that the alleles of a gene will separate into gametes during gamete formation (meiosis). This is done in such a way that each gamete contains only one allele of each gene. Hence, an organisms will contain two copies of a gene because they receive each copy (allele) from each parent during fusion of their gametes.
7. Mendel conducted an hybridization experiment i.e. a cross involving two individuals that possess different traits. He did this in order to find out how different traits/characteristics in organisms were transferred from one generation to another. Mendel chose the pea plant for his experiment because they could easily be manipulated for self and cross pollination. Mendel studied seven (7) different traits or characteristics in pea plants including height, seed shape, seed color, flower color etc.
During which of the following processes is carbon released into the atmosphere as carbon dioxide?
OA. photosynthesis and combustion
respiration and photosynthesis
OC. respiration and combustion
OD. combustion and sedimentation
22 of 30 Answered
Session Timer: 3:55
Answer:
Respiration and Combustion
Explanation:
The nephron of mammals and malpighian tubules of insects are both involved in water and salt balance. They are also similar in that they are both:_______
Over the period of a few days, a hospital receives an overwhelming increase in the number of patients with food poisoning. How would a scientist respond to this increase in sick patients? A. by examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consumed B. by giving the patients vitamin injections and prescribing a medication to calm their stomach and bowel symptoms C. by recording the patients' symptoms in their medical records and advising them to get rest and drink fluids D.by providing kind words, nurturing, and emotional support to the patients and asking them about their feelings
Answer:
A. By examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consume.
Explanation:
I believe a medical professional would be the one to prescribe patients with any sort of medicine they needed, whereas the scientist would be investigated what caused the food poison and running tests to help find out what happened.
Answer:
A. By examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consume.
Explanation:
"When human settlers arrived on the island of Mauritus, they caused the Dodo bird species to become extinct within 50 years. What did the settlers do to cause their extinction?"
Answer:
It's commonly believed that the dodo went extinct because Dutch sailors ate the beast to extinction after finding that the bird was incredibly easy to catch due to the fact it had no fear of humans.
Explanation:
how bone tissue and muscle tissue interact
Answer:
The bone tissue and muscle tissues interact for the system is more complex than components system is separately.
Explanation: Bone tissue and muscle tissue responsible for communication between bone and muscle is to research potential especially bone and muscle.
That they are bone and muscle are concept that bone and communicate biochemical and complementary and work bone and muscle in health and disease.
The bone and muscle in the viewed as that mechanical nature, bone simply the attachment sites, this is much more complex bone and muscle.
Development to the bone and muscle cells only a common experience a tightly networks of genes.
The muscle and bone regarding review article major goal of loading, bone and muscle relation mechanical coupling, and is also earliest muscle factors, bones are not through of as the pituitary adrenals, bone endocrine organ .
the size of ribosome of _________cell is smaller than ribosome of plant cell. A. Animal cell B. fungal cell C.Bacterial cell D. Protists cell
Answer:
the size of ribosome of (animal cell )is smaller than ribosome of plant cell
Answer:
Animal cell is smaller than ribosome of plant cell
Explanation:
A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory. Which statement best provides evidence that the substance is a mutagen? -The cells die within hours of being exposed to the chemical. -The cells grow more quickly than those that were not exposed to the chemical. -The cells change after being exposed to the chemical, and this change is passed to the next generation of cells. -The cells continue to divide at the same rate as before they were exposed to the chemical.
Answer:
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
Explanation:
Mutation is a process that occurs from time to time to the genetic material of living cells. Mutation is a change in the nucleotide sequence of a DNA or gene. It is usually caused by errors during replication or induced by an external substance called MUTAGEN.
A mutagen is any substance that causes mutation in an organism. Hence, according to the question, the chemical substance which is thought to be a mutagen will change the cells after being exposed to the chemical, and this change is passed to the next generation of cells.
N.B: Since mutation affects the gene, it is passed on to the offsprings during reproduction.
Answer:
its c did the test
Explanation:
During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?
Answer: Glycolsis
Glycolysis happens in the cytoplasm of the cell. Afterwards, in the presence of Oxygen, the two molecules will undergo pyruvate oxidation in the mitochondrial matrix.
i don’t know how to answer this question
The answers are:
fungi = basidiomycota
animalia = insect
plantae = cactus
What are fungi?A fungus is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.
Many people mistakenly believe fungi are plants. However, fungi are neither plants nor animals but rather organisms that form their own kingdom of life. The way they feed themselves is different from other organisms: they do not photosynthesize like plants and neither do they ingest their food like animals.
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The hydrosphere does not overlap with any other spheres true or false
Answer:
False
Explanation:
It overlaps with the lithosphere. Since some rocks produce water.
Answer:
False
Explanation:
if you think about fat as old stuff,what new stuff can be made from it
Answer:
Paints, Lubricants, Biofuel, Face cream, Soap,
Explanation:
Fat is derived from plant and animal sources. They include seeds, fruits, fatty fish.
Fats serve as a source of energy in organisms and also serve as insulation.
If you think about fat as old stuff,what new stuff can be made from it means of the things fats can be made from and they include Paints, Lubricants, Biofuel, Face cream, Soap etc. These products are manufactured in industries on a large scale due to their high demand.
Answer:
Paints, Lubricants, Biofuel, Face cream, Soap,
Explanation:
Do you think cystic fibrosis or muscular dystrophy, genetic disorder, would show up in a person's DNA fingerprint profile? Explain your Reason Please.
Answer:
we can find such type of genetic disorders through pedigree chart.
Explanation:
cystic fibrosis is a Autosomal recessive disease
Muscular dystrophy is a Autosomal dominant disease.we can see them by observing the next generations going on .we can't find them in person's DNA fingerprint profile.
What do you mean by clean water?
Answer:
it means water not polluted, without dangerous bacteria, trash and something like this
Which type of energy do you think is better: SOLAR ENERGY or WIND ENERGY?why do you think that ?
Answer:
wind energy
Explanation
wind power is more efficient than solar power or energy because this system use less energy release less carbon dioxide to the atmosphere and produce more overall energy a single wind turbine can generate same amount of electricity in Kwh as thousands of solar power panels
Answer: Wind Energy
Explanation: Wind power is considered more efficient than solar because they use less energy, release less carbon dioxide and produce more energy overall.
Wind energy runs 24 hour a day since it doesn't depend on sunlight to create energy unlike solar energy panels.
Which receptor, when activated, most likely prompts the production of saliva?
A. auditory receptors
B. optic receptors
C. skin receptors
D. taste receptors
Answer:
[tex]\large \boxed{\sf D. \ taste \ receptors}[/tex]
Explanation:
When activated, the receptor most likely prompting the production of saliva is the taste receptor. When food enters the mouth, the salivary glands produce the saliva upon the sensation of taste.
Answer:
Taste receptors.
Explanation:
When activated, the receptor most likely prompting the production of saliva is the taste receptor. When food enters the mouth, the salivary glands produce the saliva upon the sensation of taste. The secretion of saliva (salivation) is mediated by parasympathetic stimulation; acetylcholine is the active neurotransmitter and binds to muscarinic receptors in the glands, leading to increased salivation.
