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Art [367]
3 years ago
8

Which statement is correct?

Biology
1 answer:
katovenus [111]3 years ago
6 0

Answer:

D.

Explanation:

The number of neutrons always equals the number of electrons.

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2 years ago
When does primary succession occur?
Alexxx [7]
D. is your correct answer

8 0
3 years ago
What kind of living and non living things does a marine biologist study
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Every thing in the ocean coral, rocks, whales, sea plants..etc..
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4 years ago
For a parasitic organism such as ascaris what would be the selective advantage of a cuticle
vlabodo [156]
Ascaris is a type of parasitic nematode worm that inhabits the small intestine of its host, which includes humans. The intestine can be a harsh environment for biological material as it is alkaline and contains enzymes to facilitate the break down and absorption of nutrients. The presence of a <span>cuticle can act as a physical barrier, protecting the parasite from these elements.</span> 
8 0
4 years ago
Indicate whether each of the following conditions would increase or decrease the effect of acetylcholine. A. addition of a drug
Ede4ka [16]

Answer:

Explanation:

Acetylcholine is a neurotransmitter, an organic chemical that that functions in the body and brain.

It is one of the substance released by the nerve cell, so that it can send signal to cells such as;gland cell, muscle cell. Acetylcholine causes contraction of muscles and also regulates endocrine functions. Lack of acetylcholine in the body can results to muscle weakness.(myasthenia)

To Indicate whether each of the below conditions would increase or decrease the effect of acetylcholine.

A.) addition of a drug that stimulates the GTPase activity of the Gα subunit.

Answer: INCREASE

B.) mutations in the K+ channel that keep it closed all the time.

Answer: DECREASE

C.) modification of the Gα subunit by cholera toxin

Answer: INCREASE

The reason is because Toxin inhibit GTP hydrolysis

D.) a mutation that decreases the affinity of the βγ complex of the G protein for the K+ channel.

Answer: DECREASE

E.) a mutation in the acetylcholine receptor that prevents its localization on the cell surface

Answer: DECREASE

.

F.) adding acetylcholinesterase to the external environment of the cell

Answer: DECREASE

.

5 0
3 years ago
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