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Zarrin [17]
3 years ago
10

1. What causes the autorhythmicity or action potentials of the nodal cells? a. A decrease in chloride permeability b. A gradual

calcium efflux or movement out of the cell c. A gradual depolarization of the cell membrane until threshold is reached d. A gradual repolarization of the cell membrane until threshold is reached
Biology
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

The correct answer will be option-C

Explanation:

The rhythm of the heartbeat is controlled by the pacemaker of the heart called the sino-atrial node.

The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.

This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.

Thus, Option-C is the correct answer.

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Need help ASAP, TY plz answer if you know it
11Alexandr11 [23.1K]

Answer:

root hairs → 1. absorbs water and nutrients from the soil

vascular tissue → 2. consists of xylem and phloem

chloroplast → 3. the site of photosynthesis inside the cell

stem → 4. holds the leaves up high into the sunlight

leaf → 5. acts like an umbrella to absorb light  

terminal bud → 6. the growing part of the stem

taproot → 7. roots that reach deep into the ground

Explanation:

I have been able to match each term to its correct description.

From the above, we will discover that these are parts of a plant. These parts of the plant enable the plant to carry out photosynthesis and to exist.

The root hairs of the plant absorbs water and nutrients from the soil. When such are absorbed, the vascular tissues help to transport them.

The vascular tissue consists of the xylem and phloem. They  transport fluid and nutrients inside the plant. The vascular tissue is associated with two meristems which are the vascular cambium and the cork cambium. It is at the chloroplast that photosynthesis occur; where light energy is converted to chemical energy.

The stem holds the leaves firmly in order to project it to the sunlight. The leaf absorb sunlight which is needed for photosynthesis. The terminal bud is actually the part of the stem that is growing out. Taproot reach deep down the ground in search of water for the plant.

4 0
2 years ago
What is the size of an organism most likely determined by?
ss7ja [257]
(C) it's genes and it's environment.
4 0
3 years ago
N a pond, tadpoles eat algae and fish eat the tadpoles. around the pond, grasshoppers eat grass and, at night, are preyed upon b
Dima020 [189]
I believe that in this community the tadpoles are: the primary consumers. A n ecological community is the set of all populations of all species found in a given place. Primary consumers are mainly herbivores which feed on plants; which are the primary producers of all the energy in an ecosystem. In this case the tadpoles eat algae (primary producer) thus they are primary consumer. 
3 0
3 years ago
Name three ways that good health practices can help prevent gastrointestinal disorders?
Ilia_Sergeevich [38]
Answers should include three of the following ideas:
*The body needs exercise to eliminate wastes properly.
*Food poisoning can be prevented by cooking food properly and by sanitizing areas that come into contact with raw food.
*Some forms of functional dypepsia can be prevented by avoiding overeating, avoiding too many fatty foods, and chewing food adequately.
8 0
3 years ago
Forming glycogen as energy storage in the liver is an example of ________.
lorasvet [3.4K]

Forming glycogen as energy storage in the liver is an example of anabolism.

<h3>What is anabolism?</h3>

Anabolism is a metabolic process that consists of the construction and manufacture of more complex molecules from simpler molecules. This contributes to cell growth and energy storage for tissue maintenance.

The process of anabolism can be seen in processes such as the formation of triglycerides or glycogen for energy reserves within cells or in the formation of muscle proteins, given in the sports world.

In these anabolic processes, a lot of energy is consumed since much more complex molecules are being manufactured.

It is a totally opposite and complementary process to catabolism, in which these complex molecules are broken down into much simpler molecules and the release of energy is generated.

For a correct homeostasis of the body, these two processes have to be balanced and work in a <u>complementary way.</u>

Therefore, we can confirm that forming glycogen as energy storage in the liver is an example of anabolism.

To learn more about anabolism visit: brainly.com/question/16793262?referrer=searchResults

#SPJ1

7 0
2 years ago
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