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Xelga [282]
3 years ago
6

BRAINLIESTTTT ASAP!!! Identify the structures and shapes of viruses

Biology
1 answer:
Stolb23 [73]3 years ago
8 0

A virus structure can be  on of the following: icosahedral, enveloped,  complex and helical. These viruses can appear to in a shape but a closer, more steady look reveals that they are actually icosahedral.

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An envelope is used by viruses to
Lerok [7]

Answer:

Spread

Explanation:

People use envelopes very often. The germs people carry are put into the envelope and then it's sent out to many others.

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2 years ago
Plz help!
S_A_V [24]

Answer:

1.The pleural cavity aids optimal functioning of the lugs during breathing. It transmits movements of the chest wall to the lungs, particularly during heavy breathing. The closely approved chest wall transmits pressures to the visceral pleural surface and hence to the lung (10-19.

2.The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarge.

Explanation:

3 0
2 years ago
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A certain mRNA molecule has the following sequence:
jarptica [38.1K]
A. There are 4 codons
Idk B
7 0
3 years ago
Why is the nucleus command center of the cell
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It codes for all the processes within the cells and contains the DNA.
5 0
2 years ago
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An action potential causes the release of neurotransmitters by:________.
seraphim [82]

Answer:

b) opening calcium pores in the membrane

Explanation:

The opening of calcium  ions channels facilitates the migration of vesicles containing neurotransmitters in the pre-synaptic neurons  to the tip of the post-synaptic membrane. at the <u>neuromuscular  junction </u>These neurotransmitters can either be <u>cholinergic or non-chorlinergic.</u>   <u>At the tip  of the pre-synaptic membranes the vesicles empty their neurotransmitter contents into the synapse.</u>

The neurotransmitters,  diffuse through the neuromuscular junction to bind  with the receptors on the <u>post-synaptic membrane on the post-synaptic neuron.</u> This  stimulates opening of<u> ligand gated sodium ions,</u> and sodium ions  diffuse into the post-synaptic neuronal membrane, to cause <u>depolarization</u>. if the stimulus is  up to the threshold levels   it  generate action potential.

Therefore , more calcium ions channels opening produces; more diffusion of neurotransmitters;leading to opening of more sodium channels for depolarization; and IPSP or EPSP  generation.

5 0
3 years ago
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