Answer:
Sarcomeres are functional units of skeletal muscle fiber.
Explanation:
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The right answer is D. renal regulation.
Among the many factors that modulate tension (vessels, heart strength, blood volume ...), the kidney plays a vital role because it makes an enzyme called renin that helps increase blood pressure and it regulates the outflow of sodium and water, which contribute to the elevation or diminution of blood pressure in the arteries.
Answer:
Explanation:
friction between two rock surfaces grinding away minerals.
