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tia_tia [17]
3 years ago
12

When not enough oxygen is available to cells during rigorous exercise, muscle cells must convert pyruvate to __________ to gener

ate additional ATP.
A) lactic acid
B) NAD+
C) oxygen
D) glucose
Biology
1 answer:
Kipish [7]3 years ago
3 0

The correct answer is: A) lactic acid.

During the exercise, muscle cells use anaerobic respiration in order to make enough energy in the form of ATP. Anaerobic respiration doesn’t require oxygen, but glucose is broken down to produce energy. Glucose is broken down to pyruvate in the process called glycolysis. Next step is convert of pyruvate into lactic acid (or lactate).

During the exercise, the oxygen level in muscle cells decreases, which results in anaerobic respiration of the cells.


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After completing meiosis II, human sex cells have a total of _____ chromosomes
vodomira [7]

Ans.

Meiosis involves a type of cell division in sexually reproducing organisms that results in formation of four daughter cells from a single parent cell, having half of the genetic material as in parent cell. Meiosis is divided into meiosis I and meiosis II.

In gamete forming cells of humans are diploid cells and have 23 pairs of chromosomes (or 46 chromosomes). Each gamete forming mother cell undergoes meiotic division to form haploid daughter cells or gametes, each with 23 chromosomes.

Thus, the correct answer is 'twenty-three' as there are 23 chromosomes present in human sex cells at the end of meiosis II.


4 0
3 years ago
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What is this called???
olga55 [171]

I think what your answer is would be Amphibians? I could be wrong.

Hope this Helps! :)

5 0
2 years ago
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If a person uses up his or her reserve supply of glycogen and still does not eat, sugar comes from the?
Anvisha [2.4K]

If a person uses up his or her reserve supply of glycogen and still does not eat, sugar comes from the muscle.

Although only liver glycogen directly contributes to the release of glucose into circulation, maintaining a healthy blood glucose concentration is one of the glycogen's key functions. Since skeletal muscles lack glucose 6-phosphatase, they are unable to release glucose, and muscle glycogen primarily serves as a local energy source for activity rather than a source of fuel to keep blood glucose levels stable while fasting.

In fact, the breakdown of muscle glycogen into lactate allows for its delivery to the liver, where it participates in the maintenance of euglycemia through the process of gluconeogenesis (Cori cycle).

To learn more about glycogen click here

brainly.com/question/13082214

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6 0
1 year ago
Which term defines a well-tested, scientifically supported statement that explains how something works? A. hypothesis B. law C.
pshichka [43]

Answer:

I think it's (D)... But I'm not sure

7 0
3 years ago
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Is this correct...? ​
choli [55]

Answer:

yea it should be fine. I'm not sure but. it makes sense to me.

4 0
2 years ago
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