In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals from the motor cortex in the cerebrum. If such a muscle contracts involuntarily, that indicates:

Answers

Answer 1

Answer:

The correct answer is - operation of reflex arc.

Explanation:

The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.

Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.

In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.

Thus, the correct answer is - operation of reflex arc.


Related Questions

How does the body prevent the loss of sugar in urine?

Answers

Answer:

Drinking enough water prevents dehydration and also helps the kidneys remove extra sugar from the body in the urine. Those looking to reduce blood sugar levels should reach for water and avoid all sugary drinks, such as fruit juice or soda, which may raise blood sugar levels instead.

Explanation:

Determine whether each of the following is a characteristic of DNA, RNA, or both.
Is single-stranded:
Contains nitrogenous bases:
Contains uracil:
Contains adenine:
Is double-stranded:
Is made of nucleotides:
Contains deoxyribose sugar:
DONE

Answers

Answer:

Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base. DNA provides the code for the cell's activities, while RNA converts that code into proteins to carry out cellular functions.

what are the major groups of animals and how to they differ

Answers

There are many living things in the world. To keep them simple and easier to remember, the scientists had identify many groups of animals. The six main groups are: invertebrates, mammals, birds, amphibians, reptiles and fish.

Drag each characteristic to the correct location on the phylogenetic tree. Complete the phylogenetic tree by matching each characteristic that arose during the evolution of animals to its correct position.

Answers

Answer:

The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes.

Explanation:

Answer:

issue, coelom, segmentation, endoskeleton, and backbone

Explanation:

plato

You are conducting research into the effects of certain chemicals being dumped into lakes on the populations living in the lakes. Which of the following metrics is NOT used to measure populations? A. The growth rate of the population B. The density of the population C. The rate of food consumption of the population D. The size of the population

Answers

Answer:

B. The density of the population.

Explanation:

Because he was well aware of the effect his theory of evolution would have on the public and on the Church of England, Darwin delayed publishing his work for several decades while he gathered additional evidence. After invoking selective breeding of domesticated species as evidence that groups of organisms are capable of change, he then proposed that natural populations can change as well. On which two lines of evidence did he base this proposal? a) Individuals within a population vary, yet island species around the world all appear to be related to each other.b) Organisms produce more offspring than can be supported by their environment, and adaptations to specific environments increase an organism's ability to survive and reproduce.c) Organisms within a population vary, and all populations produce more offspring than can be supported by the environment, resulting in competition for survival within the population.d) Some individuals leave more descendants than other individuals, but the individuals in a population are essentially identical to each other.e) Some individuals within a population have greater success in survival and reproduction than others, and favorable traits within a population will accumulate over generations.

Answers

Answer:

c) Organisms within a population vary, and all populations produce more offspring than can be supported by the environment, resulting in competition for survival within the population.

Explanation:

Darwin's theory was based on the evidence of natural selection and survival of the fittest.

Evidence of Darwin's theory were observed from the variation in the population which is supported by the environmental factor (natural selection) and these population than produce offspring, resulting in competition for survival within the population (survival for fittest).

Hence, the correct option is "c".

Atmospheric nitrogen can be fixed by nitrogen-fixing bacteria. Arrange the following forms of nitrogen from the atmospheric N stage to the final form that enters the roots. 1. Ammonia 2. Nitrogen gas 3. Ammonium ion 4. Nitrite 5. Nitrate

Answers

Answer:the answer is ammonia

Explanation:the nitrogen fixing bacteria fix the nitrogen as ammonia

The image shows a food web in an Arctic ecosystem. Rising temperatures in the Arctic Ocean can lead to large die-offs of phytoplankton, which are autotrophs. What would most likely happen in an Arctic ecosystem if the phytoplankton population decreased?

Answers

Answer:

as the population of phytoplankton decreases, the amount of food for zooplancktons decreases

Scientists want to track the wind speeds and precipitation for a hurricane that will affect the entire East Coast of the United States. Which weather equipment would be best to measure the impact of the storm for this entire region? A. an anemometer B. a rain gauge C. Doppler Radar D. global positioning system (GPS)

Answers

Answer:

A anemometer an instrument for measuring the speed of the wind, or of any current of gas.

GPS is to see where you on on the earth so this is a no.

rain gauge only shows the amount of rain  so this is a no

Doppler radar determine's the location and velocity of a storm, clouds, precipitation. So therefore, this is your answer.

Explanation:

which type of cell(s) contain ribosomes?

Answers

Answer:

Ribosomes are found in prokaryotic and eukaryotic cells; in mitochondria, chloroplasts and bacteria. Those found in prokaryotes are generally smaller than those in eukaryotes. Ribosomes in mitochondria and chloroplasts are similar in size to those in bacteria. hope this is good enough to help you

Explanation:

who discovered micro organisms​

Answers

Robert Hooke is the person that discovered Micro organism

Answer:

An English architect, "Robert Hooke" discovered micro organisms in 1665.

Hope this helped!

Have a nice day:)

BRAINLIEST would really help me:)

What is meant by crop rotation?

Answers

Answer:

Crop rotation is the practice of growing a series of different types of crops in the same area in a sequence of growing seasons.

Explanation:

It reduces reliance on set of nutrients.

Hope it helps.

What is chromosomes?Write in brief about the structure of a chromosome.must include all points with explanations

Answers

Answer:

Please find the detailed explanation below

Explanation:

A chromosome is thread-like material that carries the long strands of the genetic material (DNA), which in turn carries the gene. The chromosome is the found form of nuclear material in the nucleus.

Due to the long nature of the DNA molecule, they cannot fit into the cell. Hence, to ensure they fit, the cell wraps the DNA molecule around a set of protein called HISTONE proteins to form a NUCLEOSOME. Each nucleosome is made up of DNA coiled around a set of 8 proteins called HISTONE OCTAMER. The nucleosome structure becomes more compacted and further wound around the histone to form a CHROMATIN. This chromatin then undergoes condensation to form the visible CHROMOSOME structure.

What results if a broken chromosomal fragment becomes reattached as an extra segment to a sister or non-sister chromatid? A Duplication B Inversion C Polyploidy D Nondisjunction

Answers

Answer:

The correct answer is option A "Duplication".

Explanation:

Chromosomal duplication is defined as a type of rearrangement of genetic material at which extra copies of a DNA fragment are created. In this case if a broken chromosomal fragment becomes reattached, this fragment will represent an extra copy, and therefore the resultant genetic material is considered a chromosomal duplication.

What are emergent properties?

Answers

Answer:

Emerging properties may arise by transient interactions such as individual organisms building a population. Human interaction in populations leads to the emergence of language, poetry, musical composition, and art. When populations of different species interact, communities form. Many emergent properties are the result of interactions between species in communities.

Emergent properties are characteristics of a system that do not exist in any of its constituent parts individually but originate as a result of interactions between those parts.

What does the characters indicate at ?

These characteristics are frequently intricate and challenging to forecast. Emergent characteristics are a crucial idea in several disciplines, including physics, chemistry, and biology.

Emergent qualities in biology can be observed in an organism's behaviour. For instance, a flock of birds' behaviour is an emergent characteristic of the individual birds that make up the flock.

The behaviour of the flock is a product of interactions among the individual birds and is not exhibited by any one individual bird. Similar to this, a school of fish's behaviour is an emergent characteristic of each fish.

Emergent features in chemistry can be observed in how molecules behave. An emergent attribute of a substance's individual molecules, for instance, is the substance's boiling point. The boiling point is not a property of any one molecule, but rather the outcome of interactions between the molecules.

Particle behaviour in physics exhibits emergent features. An emergent attribute of a material's individual particles, for instance, is the material's electrical conductivity.

The interactions between the individual particles produce the electrical conductivity, which is not a property of any one of the individual particles. As a result, emergent properties are characteristics of a system that develop.

Learn more about emergent properties at:

https://brainly.com/question/28014984

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A gamete is best described as what?
A. The protective outer layer of an egg cell.
B. An enzyme in a sperm used to digest the egg cell's membrane.
C. A haploid cell produced for reproduction.
D. A diploid cell produced for reproduction.

Answers

Answer:

C. A haploid cell produced for reproduction.

Explanation:

The term "gamete" refers to reproductive cells such as sperm and ova. Sperm and ova are both haploid cells that unite to form diploid cells.

Arrange the sentences in order to describe how oxygen from air is transported to the cells in the kidneys.

Answers

Answer:

The pulmonary veins carry oxygenated blood to the heart. Air enters the bronchioles in the lungs and reaches the alveoli. The capillaries join together to reach the arteries, transferring the oxygen. The oxygen-rich blood moves from the aorta and reaches the kidneys through a series of blood vessels.

Place the 4 steps of biofilm formation, listed below, in the correct order.
1. Surface (substratum) is preconditioned by environmental molecules.
2. Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably.
3. Biofilm matures and some microorganisms escape to the planktonic state.
4. Microbes attach and detach from the preconditioned surface.

Answers

Answer:

1. Surface (substratum) is preconditioned by environment molecules.

4. Microbes attach and detach from the preconditioned surface.

2.Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably.

3. Biofilm matures and some microorganisms escape to the plank-tonic state.

Explanation:

Biofilm is a process in which microorganism irreversibly attach and grow on the surface to produce extra cellular polymers that facilitate formation of matrix. The biofilm process takes three days for the formation after which thickness of plaque increases. There are 4 main steps in biofilm formation. Surface is preconditioned by environment molecules. The microbes attach the preconditioned surface. Establishment of extra cellular matrix and finally biofilm matures.

What is biology??And what does it came from??

Answers

Answer:

BIOLOGY IS THE STUDY OF LIFE

Explanation:

Answer:

Biology is studying about life and the human body. The term biology in its modern sense appears to have been introduced independently by Thomas Beddoes (in 1799)

Hope this helps!

What do nitrifying bacteria do?

Answers

Answer: Nitrifying bacteria such as Nitrosomonas play an important role in providing nitrogen to plants and limiting carbon dioxide fixation. They are found widely distributed in soil or water, where there are large amounts of ammonia, such as lakes or streams into which treated and untreated sewage is pumped.

Explanation:

Answer:

They change Nitrogen to Nitrite and ammonia. Which helps plants to use Nitrogen even though it's in another form.

Hope this helps ;) ❤❤❤

why aphids are mostly found in the daytime ?​

Answers

Answer:

When daytime high temperatures are between 90 degrees Fahrenheit

When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). Which two classes of DNA do these different samples represent

Answers

Answer:

Leading strand and Okazaki fragments

Explanation:

The two classes of DNA that the different samples represent include the leading strand and the Okazaki fragments.

The large molecules DNA with thousands/millions of nucleotides constitutes the leading strand of the DNA while the short stretches of DNA with just a few thousand nucleotides in light constitute the Okazaki fragments.

This is because, during replication, the leading strands of DNAs are usually synthesized in a continuous manner and end up forming a long, continuous daughter strand while the lagging strands are usually synthesized in short, discontinuous fragments known as the Okazaki fragments.

The continuous/discontinuous replication of the leading/lagging strands of the DNA is due to the characteristics of the enzyme responsible for adding bases to the growing daughter strands. The DNA polymerase enzyme can only add nucleotides in the 5' to ' direction.

Plants respond to changes in their environment. They detect gravity, light, touch, and seasonal changes, and respond to these stimuli in many ways. Which statement best explains this flexibility in response? A) Phenotypes are controlled by one gene that codes for multiple regulatory proteins. B) The genes that regulate plant responses can be expressed in different ways. C) The genes that regulate plant responses can mutate to adjust to environmental changes. D) Phenotypes control the genotypes of individuals, determining plant responses.

Answers

Answer:

B)

Explanation:

Plants have the ability to detect the changes in their environment and respond accordingly. Plants' responses to stimuli is due to the genes that regulate plant responses can be expressed in different ways.

Genes code for hormones and support transport of hormonal synthesis in plants. Plants hormone such as auxin promotes different changes in plant growth in response to light, gravity, touch or seasonal changes and the auxin respond due to transport inhibitor response 2 gene.

Hence, the correct answer is "B".

Raekwon wanted to see if listening to music would make the basketball players make more
baskets. On day one, he didn't play any music and counted how many baskets they could
make in 10 minutes. On day 2, he played rap music and counted the baskets, and on day 3,
he played classical music and counted the baskets. IV DV control​

Answers

answer

IV-music

DV-baskets in 10 mins

control-the day no music was played

step by step

IV is the variable being adjusted to achieve variety of results

DV is the counts that will depend on the music played

control with no music only one variable was being tested the counts so a control is where one variable is being tested

what is the volume of a cylinder if the height is 6 cm and the radius is 4 cm?​

Answers

Answer:

v = πr²h

v = 3.142*4²*6

v = 301.71cm³

Explanation:

volume of the cylinder = πr²h

name 3 physiological processes of cell membrane?{3mks} plz help me guys

Answers

Answer:

the cell membrane is an extremely pliable structure composed primarily of back -to- back phospholipids (a "bilayer")

Which ecosystem service would suffer from the opening of a mineral mine along a small mountain range?

A. Cultural
B. Provisioning
C. Regulating
D. Supporting

Answers

Answer:

D. Supporting

Explanation:

Ecosystem services include provisioning, regulating, culture and supporting services.

Opening of a mineral mine along a small mountain range will affect the supporting services of ecosystem because supporting services deals with soil formation, provision of habitat and nutrition cycle.

Opening of mineral mine will destroy the tosoil, landscape, forests and wildlife of mountain area which affect the supporting services such as habitat and soil formation.

Hence, the correct answer is "D. supporting".

what in your home would be considered something you could study in biology?

Answers

Answer:

Food and plants!

What is the monomer that’s makes up polysaccharides

Answers

Answer:

glucose

Explanation:

Polysaccharides are long chains of monosaccharides linked by glycosidic bonds. Three important polysaccharides, starch, glycogen, and cellulose, are composed of glucose. Starch and glycogen serve as short-term energy stores in plants and animals, respectively. The glucose monomers are linked by α glycosidic bonds.

What is each half of a chromosome called?
O A. Demisome
OB. Spindle Fiber
C. Chromatid
D. Centromere

Answers

Answer:

cromatidaida

Explanation:

Answer:

the answer is C

''chromatid''

Explanation:

hope this helps :)

Other Questions
A tank contains 15,000 L of brine with 24 kg of dissolved salt. Pure water enters the tank at a rate of 150 L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate.How much salt is in the tank after t minutes Which of the following statements are TRUE regarding the sale of a long position in a restricted long margin account?I. 50% of the proceeds of the sale are credited to SMAII. 100% of the proceeds of the sale are credited to SMAIII. There is a 0% retention requirement of the sale for a restricted accountIV. There is a 50% retention requirement of the sale for a restricted accounta. I and IIIb. I and IVc. II and IIId. II and IV Which of the following descriptions summarizes the political structure of the Bedouins?Question 9 options:sedentary groups controlled by foreign powersherders with tribal leaders but no formal governmentsmall groups headed by emirs, or Arab rulersnomadic groups governed by the Sa'ud family roberta is 6 times danielles age. in 12 years, roberta will only be 2 times danielles age. how old is danielle now? Hughey Co. as lessee records a capital lease of machinery on January 1, 2011. The seven annual lease payments of $350,000 are made at the end of each year. The present value of the lease payments at 10% is $1,704,000. Hughey uses the effective-interest method of amortization and sum-of-the-years'-digits depreciation (no residual value). Round to the nearest dollar. a) Prepare an amortization table for 2 011 and 2012. b) Prepare all of Hughey's journal entries for 2011. Find the value of x. A chemist prepares a solution of sodium chloride by measuring out 25.4 grams of sodium chloride into a 100. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium chloride solution. Be sure your answer has the correct number of significant digits. Communities and States are controlled by the ______________. Yellowstone Corporation has just announced the repurchase of $125,000 of its stock. The company has 39,000 shares outstanding and earnings per share of $3.29. The company stock is currently selling for $76.09 per share. What is the priceearnings ratio after the repurchase? What is the reason: if a+c=b+c then a=b 3.03 times 10^-3 in scientific nation What does it mean to be a good citizen? Why is this important? "Dot painting" is seen today as a unique artistic attribute of Australian Pintupi culture, and has become quite revered on the global art scene. When do anthropologists believe that this art form originated within the Australian settlement of Papunya?a. 1970b. 1972c. 1980d. 1969 Cuntos adjetivos calificativos hay? Los esteroides oculares estn indicados en condiciones inflamatorias de la conjuntiva palpebral, cuando se acepta el riesgo inherente al uso de esteroides en determinadas conjuntivitis infecciosas a)cuatro b)seis c)dos d)ocho e)uno Buckson Framing's cost formula for its supplies cost is $1,350 per month plus $18 per frame. For the month of June, the company planned for activity of 716 frames, but the actual level of activity was 713 frames. The actual supplies cost for the month was $14,820. The supplies cost in the flexible budget for June would be closest to: L Corporation produces and sells 15,100 units of Product X each month. The selling price of Product X is $21 per unit, and variable expenses are $15 per unit. A study has been made concerning whether Product X should be discontinued. The study shows that $72,000 of the $101,000 in monthly fixed expenses charged to Product X would not be avoidable even if the product was discontinued. If Product X is discontinued, the annual financial advantage (disadvantage) for the company of eliminating this product should be: Multiple Choice $10,400 ($61,600) ($39,400) $39,400 Find the Value of X 1. Solve for X algebraically. 2. Using complete sentences, describe your method for finding X. Answer Both Questions Karmen returned a bicycle to Earl's Bike Shop. The sales receipt showed a total paid price of $211.86, including the 7% sales tax. What was the cost of the bicycle without the sales tax? Any help would be very appreciated! Thank you very much! please solution this question now .thank you very much