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lara [203]
3 years ago
15

Why do lymph nodes get swollen?

Biology
1 answer:
anzhelika [568]3 years ago
3 0

Answer:

Lymph nodes become swollen in response to illness, infection, or stress.

Explanation:

Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of the responsible agents.

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An inhibitory stimulus has occurred. B. Chemically gated potassium channels have opened. C. Excessive potassium has diffused out
andrezito [222]

Given question is incomplete. Complete question has been attached.

Answer:

C. Excessive potassium has diffused out causing hyperpolarization.

Explanation:

The nerve action potential can be divided into following stages:

  • Stimulus is detected by the cell in resting stage.
  • Sodium channels in the membrane open from where influx of sodium ions occur which is called depolarization
  • After a while, sodium channels close and potassium channels open from where efflux of potassium ions occur which is called repolarization.
  • The membrane potential further lowers due to continous efflux of potassium ions which is called hyperpolarization.
  • After a while potassium channels close and membrane returns to its resting stage.

In the given figure, stage 4 depicts hyperpolarization because the membrane potential has dropped to the lowest point below -70mV. Hence, option C is correct.

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A biome is defined by it
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In grafting, the plant with the root system is called the , and the portion of the plant with the buds is called the .
Vikki [24]
The plant with the root system is called the rootstock And the portion of the plant with the buds is called the scion
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What could be the possible result of founder effect on genetic variation?
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The possible result of the founder effect would be loss of genetic variation. The reason why this is so is because by definition, the founder effect is often considered to be the cause for a essened genetic variation in a specie or a certain area where organisms thrive. 
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Species found in only one place on earth are called ________ species.
pochemuha

Answer:

endemic species

Explanation:

Species found in only one place on earth are called endemic species

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