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Igoryamba
2 years ago
11

Um i need help please and thank you...

Biology
1 answer:
AysviL [449]2 years ago
8 0

Answer:

A or c

Explanation:

they are the closest to the human bar

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Why do you think this is important for aquatic animals that live in very cold places?
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1 year ago
1.) Librarians organize books according to a classification system. Describe another type of classification system you have seen
Mila [183]

Answer:

1) 5 kingdom system of classification is a type of classification in which all the living organisms are classified into 5 kingdoms i. e. protista, monera, fungi, plantae and animalia.

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3 years ago
Which of the following characteristics are true for an action potential?
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I, II, III

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A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.

Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.

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