Which receptor hyperpolarizes the axon terminal to slow or cancel the action potential when norepinephrine binds

1 answer:

3 0

Which receptor hyperpolarizes the axon terminal to slow or cancel the action potential when norepinephrine binds? Nicotinic and muscarinic receptors are classified as: cholinergic receptors.

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Difference between Hilum and micropyle.

Alex_Xolod [135]

Answer:

Hilum is an elliptical scar on the seed, which marks the point of attachment of the funicle.

Micropyle is the small end of the helium in which the pollen tube go through prior to fertilization.

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What is the difference between mitosis and cytokinesis? which one has to occur first? why?

madreJ [45]

Both Mitosis and Cytokinesis are a part of cell division. Basically, Mitosis is a process by which the duplicated genome in a cell is separated into halves that are identical in nature. Cytokinesis is the process where the cytoplasm of the cell divides to form two 'daughter' cells.

During mitosis, when the nucleus divides, the two chromatids that make up each chromosome separate from each other and move to opposite poles of the cell. Which allows cytokinesis to take place.

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Which organelle provides support for the cell and may also help the cell move?

Olin [163]

Cytoskeleton because it maintains cell's shape, secures organelles in specific positions, allows cytoplasm and vesicles to move within the cell

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Which of these tools is used to transfer a gene into an animal?

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B they are used for the process of gene transfer

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4 years ago

Which element is most likely to replace hydrogen in a displacement reaction?

LUCKY_DIMON [66]

Answer: The correct option is (D) lithium (Li).

Explanation: Hydrogen is the element which belong to period 1. The atomic number of hydrogen is, 1

The electronic configuration of hydrogen is,

The number of valence electrons present in hydrogen is, 1.

(A) Helium is the element which belong to period 1. The atomic number of helium is, 2

The electronic configuration of helium is,

The number of valence electrons present in helium is, 2.

(B) Oxygen is the element which belong to period 2. The atomic number of oxygen is, 8

The electronic configuration of oxygen is,

The number of valence electrons present in oxygen is, 6.

(C) Nitrogen is the element which belong to period 2. The atomic number of nitrogen is, 7

The electronic configuration of nitrogen is,

The number of valence electrons present in nitrogen is, 5.

(D) Lithium is the element which belong to period 2. The atomic number of lithium is, 3

The electronic configuration of lithium is,

The number of valence electrons present in lithium is, 1.

From this we conclude that the lithium element has the same number of valence electrons as hydrogen.

Hence, the correct option is (D) lithium (Li).

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3 years ago