Refer to PowerPoint on BV_s and Circulation If BP drops, hormones are released.

Question

Refer to PowerPoint on BV_s and Circulation If BP drops, hormones are released. Name 1 target site and the effect at this target site to increase BP back to homeostatic range If BP drops, hormones are released. Name 1 target site and the effect at this target site to decrease BP back to homeostatic range If BP rises, hormones are released. Name 1 target site and the effect at this target site to decrease BP back to homeostatic range If BP rises, hormones are released. Name 1 target site and the effect at this target site to decrease BP back to homeostatic range

Explanation / Answer

When Bp rises: Juxta glomerular cells of kidney. These cause release of renin which by the renin angiotensin aldosterone mechanism lower the blood pressure. They act on various sites on the nephron like PCT and the loop of henle and DCT

he release of the hormone atrial natriuretic peptide decreases BP by vasodialation and increased excretion of H2O and sodium. The target is the heart muscle

When BP decreases

ADH Secreted by hypothalamus decreases urine output and hence increases BP. The target is the kidney nephrons.

Epinephrine and norepinephrine are secreted by the adrenal medulla increase heart rate and heart muscle contractility and by causing vasoconstriction of arteries and veins

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