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White raven [17]
3 years ago
15

Why does the body switch between cellular and anaerobic respiration?

Biology
1 answer:
34kurt3 years ago
7 0
<span>The body needs oxygen for cellular respiration. When doing strenuous activity, such as lifting weights, the mitochondria cannot get enough oxygen. Without oxygen to act as an electron receptor, the body creates lactic acid to "reset" coenzymes to continue respiration.</span>
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What evidence suggests that RNA appeared before DNA? ribozymes, catalytic RNA, play pivotal roles in modern cells ribosomes are
mote1985 [20]

Answer:

<em>The evidence that suggests  RNA  appeared before DNA is the fact that RNA can act as an enzyme to self-edit their own genetic code. </em>Moreover, it has the ability to store genetic information, while transfer and ribosomal RNA have the ability to translate genetic information into proteins.

Explanation:

RNA has a great capability as a genetic molecule, it once had to carry on hereditary process on its own. It is absolutely sure that RNA was the first molecule of heredity. However, a single stranded RNA is rather unstable and easily damaged by enzymes. By essentially multiplying the existing RNA molecule, and using deoxyribose sugar instead of ribose.

<em>The DNA evolved as a much more stable form to pass genetic information with accuracy.  It shows a biological evolutionary purpose .</em>

<em />

7 0
2 years ago
Read 2 more answers
Aldosterone stimulates an increase in sodium reabsorption at the same time it stimulates an increase in potassium secretion. ald
Katarina [22]
A. True
Aldosterone stimulates the Na+/K+ pump in renal tubules to exchange Na+ (sodium) for K+ (potassium). This, using ATP energy for active transport, leads to reabsorption of sodium into the bloodstream and secretion of potassium into the urine.
7 0
3 years ago
Explain the effect that extreme vagus nerve stimulation had on the heart. how well did the results compare with your prediction?
BaLLatris [955]
For the answer to the question above, I believe that the answer to your question is that the heart rate will decrease if there's an extreme vagus nerve stimulation <span>The vagus nerve is part of the parasympathetic nervous system. The sympathetic nervous system is the "fight or flight" part of the autonomic nervous system, whereas the parasympathetic is the "feed or breed" part. The sympathetic side acts to speed things up; it increases heart rate, the blood pressure, also the respiratory rate, it dilates pupils, shunts blood away from the GI tract, and so on...
The parasympathetic the opposite in which acts to slow things down; it lowers down the heart rate or decrease blood pressure, it increases salivation, increase blood flow to the GI tract, and so on. The two systems are always balancing each other. The confusing part is that when you INCREASE the activity of the parasympathetic nervous system you DECREASE the activity of the heart; so increased vagal tone will slow the heart rate, decreases the contractility, and lowers blood pressure. When the heart is excitable and has certain types of arrhythmia, increasing the vagal stimulation can slow the heart down enough to allow the normal pacemaker functions to take over again also called as converting.</span>
6 0
3 years ago
Read 2 more answers
Drug-induced neutropenia is a disease that has significantly increased in incidence over the last several decades. What is the a
Marta_Voda [28]

The attributing factor in the increased incidence of drug-induced neutropenia is; treatment of cancer by chemotherapuetic drugs such as alkylating agents.

Drug-induced neutropenia is a condition in which there is reduction in absolute neutrophil count (ANC), caused by exposure to a medication. Drug-induced neutropenia usually occurs within the first few weeks after the introduction of drugs. Drug-induced neutropenia is a common adverse effect associated with many chemotherapy agents (drugs used in the treatment of cancer).



7 0
3 years ago
PLEASE HELP 50 POINTS!!
Sav [38]

Answer:

non renewable

erosion

reforestation

Explanation:

as for the last one I'm not sure but the most effective way or measure is supposed to be reforestation

4 0
2 years ago
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