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klasskru [66]
3 years ago
13

Which of the following is only a muscle-strengthening activity that can be completed in school? Running, Sit-ups, jumping, or st

retching
Health
2 answers:
Alona [7]3 years ago
6 0

Sit-Ups

I hope this helps you! :)

Vinvika [58]3 years ago
5 0
Sit-ups are the muscle strengthening activity. Running and jumping are both cardio, and stretching just warms up the muscles.
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In organisms the most important electrolytes from the point of view of their concentration, therefore, of their osmotic effect, are the sodium and potassium ions. But they predominate in different compartments. Potassium is the most important electrolyte in the cell compartment while sodium is in the extracellular compartment. The concentration of these cations in the compartments indicated is expressed as a characteristic called osmolarity (number of osmoles per liter).

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But also hypovolemia stimulates the secretion of renin by the kidneys. This enzyme causes the formation in the blood plasma of a substance, angiotensin I, which is transformable in another molecule, angiotensin II. This is a peptide that acts as a potent vasoconstrictor, but at the same time stimulates the secretion of aldosterone, a hormone from the adrenal cortex that also acts on the kidney. In this organ it causes the reabsorption of Na +, which passes to the plasma where it acts as a water retention factor, contributing, therefore, to the restoration and / or conservation of plasma volume.

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