Which of the following statements about the action potentials in contractile myocardial cells (cardiac muscle) is INCORRECT? Compared to skeletal muscle cells, contractile myocardial cells have a lower (more negative) resting membrane potential. Action potentials are propagated between adjacent cardiomyocytes through gap junctions. The duration of an action potential in a contractile myocardial cell is greater than the duration of an action potential in a typical neuron. During the repolarization phase of a contractile myocardial action potential, the cell is highly permeable to sodium, potassium and calcium.

Answers

Answer 1

Answer: During the repolarization phase of a contractile myocardial action potential, the cell is highly permeable to sodium, potassium and calcium.

Explanation:

Apart from the fact that contractile cells conduct impulses, it also helps in contractions which are needed for pumping of blood. It should also be noted that the myocardial conducting cells serves as the heart's conduction system. They also have a lower resting membrane potential.

Of the options given, the answer is the last option i.e. during the repolarization phase of a contractile myocardial action potential, the cell is highly permeable to sodium, potassium and calcium. This is wrong.

Repolarization occurs due to a rise in the permeability of potassium and during repolarization, the calcium channels close.


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High Temperatures
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what structures are found in every living cell

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Answer:

The parts include a plasma membrane, cytoplasm, ribosomes, and DNA.

Explanation:

The structures found in every living cell are:

Plasma membraneCytoplasmDNA

Cells are the smallest anatomical unit of organisms that perform all the characteristic functions of living beings, their structures are functionally related in order to keep the cell alive and reproduce it.

The outer limit of the cell is the plasma membrane.

It has two basic functions:.  

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Therefore, we can conclude that the main structures found in every living cell are the plasma membrane, and the compartment that it encloses, called cytoplasm, which contains the hereditary material (DNA), where cellular activities are governed.

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The Florida panther's population was reduced to zero in Florida due to overhunting. Panthers were reintroduced to Florida in 1995 and small populations now live in the southern swamplands of the state. Wildlife scientists carefully watch to see how the populations change from year to year. Which of the following events would decrease a population of panthers?
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Answer:

B is the correct answer

Explanation:

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Answer:

Explanation:

They can be used to genetically modify organisms, such as the first GMO food, the Flavr Savr Tomato. It was injected with plasmids from modified bacteria in order to give the tomato a much longer shelf life and not spoil. There are much more useful applications for this, such as potentially stopping cancer cells from replicating and multiplying within someone's body, or to make corn grow faster with bigger yields. In the future, it could be the answer to the problem of the quick expansion of our population.

Does a toucan eat a frog ?

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Yes they do, look at the image.

Answer:

Explanation

toucans take delight in eating the eggs of smaller birds, small juicy insects, tree frogs and reptiles including lizards and snakes.

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the river caused erosion, making the river grow wider and the rocks grow smaller

what is the difference between interna and external criticism​

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Answer:

The difference between external and internal criticism is when we say external criticism it examines the authenticity of the document or the evidence being. While internal criticism examines the truthfulness of the content of the evidence. 0.0 (0 votes)

Explanation:

What is heliozoa in the simplest definition? ( Science)

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Answer:

A heliozoa is a phylum of single-celled aquatic animals that are related to the radiolarians

Explanation:

Answer:

heliozoa: microbial eukaryotes (protists) with stiff arms (axopodia) radiating from their spherical bodies, which are responsible for their common name.

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Answers

Answer:

C. The judiciary act of 1789

Explanation:

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Answer:

The correct answer is "Yamnaya".

Explanation:

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How do changes in temperature at a person’s extremities (external environment) affect the person’s core body temperature?

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Answer:

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Explanation:

ANSWER ASAP PLEASE Explain the meaning of the term "soil taxonomy," using taxonomic examples to illustrate application of the field.

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Answer:

Soil in this text is a natural body comprised of solids

(minerals and organic matter), liquid, and gases that occurs

on the land surface, occupies space, and is characterized by

one or both of the following: horizons, or layers, that are

distinguishable from the initial material as a result of additions,

losses, transfers, and transformations of energy and matter or

the ability to support rooted plants in a natural environment

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previous version of Soil Taxonomy (Soil Survey Staff, 1975) to

include soils in areas of Antarctica where pedogenesis occurs

but where the climate is too harsh to support the higher plant

forms.

The upper limit of soil is the boundary between soil and

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(typically more than about 2.5 m) for the growth of rooted

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horizons near the earth’s surface that, in contrast to the

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bedrocks (some densic materials, defined later) have been

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air or other interpretative concerns.

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gleyed soil material may begin a few centimeters below the

surface and, in some areas, continue down for several meters

apparently unchanged with increasing depth. The latter

condition can arise through the gradual filling of a wet basin

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mass of gleyed material that may be relatively uniform. In both

of these situations, there is no alternative but to set the lower

limit of soil at the arbitrary limit of 200 cm.

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genetic horizons, although the presence or absence of genetic

horizons and their nature are of extreme importance in soil

classification. Plants can be grown under glass in pots filled

with earthy materials, such as peat or sand, or even in water.

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plants, but they are non soil here in the sense that they cannot

be classified in the same system that is used for the soils of a

survey area, county, or even nation. Plants even grow on trees

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Answer: to get away from the handler

Explanation:

Comprehensive Biology What process is used in this example?

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Answers

Answer:

The answer is b

Explanation:

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Answers

the answer is cholesterol

Answer:

Cholesterol helps make animal membranes more rigid.

Hope it will help you

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True or False

Answers

Answer:

true

Explanation:

dietary fiber build muscle and flexibility

Dietary fiber is one of the components of a nutrient and balanced diet. Dietary fiber in the diet can build muscle and flexibility. Thus, the statement is true.

What is dietary fiber?

Dietary fiber along with the functional fibers makes the total fiber that makes part of the diet and is considered to be nutritious. They are homopolysaccharides that are made of various similar monomers linked concurrently by the glycosidic linkage.

Dietary fiber is composed of various units of cellulose linked chemically by the beta (1 - 4) glycosidic linkage. They have been known as roughage which are plant parts that are undigestable. Though they cannot be absorbed, but they ensure a smooth digestive and excretory process.

The presence of dietary fiber in the diet increases flexibility and muscle mass by decreasing body fat and is found in beans, broccoli, avocados, berries, apples, etc. It eliminates fats and other wastes from the body by promoting regular bowel movements.

Therefore, the statement is true.

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What is a predator? Give two examples.
PLEASE

Answers

Answer:

Some very common examples are a lion (predator) and a zebra (pray) or a bear (predator) and a salmon (pray).

Explanation:

A predator is an organism (plant or animal) that eats another organism (plant or animal). The prey is the organism that is eaten by the predator. Which means the predator is the thing eating the pray.

Answer:

A Predator can not be eaten but eats the others and a predator is probaly not afraid to get in a fight with another animal

Explanation:

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Answers

Answer:

I believe it's true.

Answer:

true

Explanation:

viruses are an living organism and appear to be the smallest living organisms compared to any other organisms .

DUE BY MIDNIGHT. Just need to make sure it’s correct.

Answers

Answer:

Yes, it is correct, but you should also specify that B stands for black and b stands for gray, it is also important to mention the characteristic in order to have full information.

Which of the following ways are leftover neurotransmitters cleaned up if they
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Pick 2
the neurotransmitters are broken down in the synapse

the postsynaptic neuron absorbs the neurotransmitters

The presynaptic neuron absorbs the neurotransmitters

the neurotransmitters are built up to create a new neuron

Answers

Answer:

The correct answer is -

the neurotransmitters are broken down in the synapse

The presynaptic neuron absorbs the neurotransmitters

Explanation:

The termination of the neurotransmitters is essential as if they can cause harm by continuing the stimulus effect on the muscles or cells. To clean up these neurotransmitters there are two ways- Degradation of neurotransmitters with the help of enzymes in the synapses or synaptic cleft and the presynaptic neurons absorbs or suck up neurotransmitters. The neuron (presynaptic neuron) is that releases the neurotransmitter like dopamine, serotonin, is the one that re-uptake it.

This reuptake is done by transporter proteins that are are symporters in nature as these proteins pump neurotransmitters as well as ions back into the neuron.

I just bombed this test and i have 1 retake left. please help!!

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Answer:

hydrolysis

Explanation:

Dephosphorylation is the removal of a phosphate (PO43−) group from an organic compound by hydrolysis, so therefore hydrolysis is your answer.

Which does a reference point provide? A-a position from which to measure future distanceB- a set of standard units for measuring displacement C-a standard method for evaluating variables D-a method for determining the speed of an object​

Answers

Answer:

A.

Explanation:

Answer:

a position from which to measure future distance

Explanation:

Hope this helps!! :)

what kind of bond forms when atoms in a molecule do not share their electrons equally

a. an ionic bond
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Answers

Answer:

A polar bond

Explanation:

Ionic bond don't share but one atom accepts electron while the other gives away electron Metallic bond are held by metals and they contribute their outer valency electrons to the electron cloud thus making them positive A polar bond deals with the share of unequal electron (I.e. Covalent polar bond) A hydrogen bond is covalently bonded to highly electronegative elements of small atomic size

of which wavelength of light do carotenoids absorb the greatest percentage?
A. 400
B. 500
C. 600
D. 700​

Answers

Answer:technically it is 460 but if u round it is 500

Explanation:

In a chemical reaction, atoms do which of the following?
A
Remain bound to the same atoms
B
Split in half
c
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Answers

C. Combine with new atoms

This is how things are made, like oxygen (O2) and hydrogen (h2) combine to make water (H2O)

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Answer:

Plant cells have rigid walls that contain organs that regulate plant health and growth. Among the plant cell organs are the vacuoles, the largest and main mechanisms for maintaining homeostasis, and chloroplasts, which produce energy

Explanation:

TRUE or FALSE: When an enzyme becomes non-functional as a result of
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O True
O False

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i think that’s it’s true

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growers.

Answers

Answer:

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Explanation:

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