Question

multiple choice: read each question carefully. place the letter of the correct answer on
e line next to the question number. please use capital letters only!! (1 point per
question).

1. occasionally a person’s blood pressure may decrease due to dehydration. when

this happens, hormones are released that trigger a reaction in the cells of the
kidneys to reabsorb water. this keeps water in the blood and raises blood
pressure. this is an example of:
a. autoregulation
b. positive feedback
c. extrinsic regulation
d. transverse feedback

Explanation:

To solve this, we analyze each option:

• Option a: Autoregulation is local, internal regulation (e.g., blood vessel constriction in tissues), but here hormones (external to the kidney's local autoreg) are involved. Eliminate a.
• Option b: Positive feedback amplifies a change, but this scenario is about restoring blood pressure (stabilizing), so it's negative feedback - but positive feedback is not correct here. Wait, re - check: The process is about restoring blood pressure (returning to set point), but let's check option c.
• Option c: Extrinsic regulation is regulation by the endocrine or nervous system (external to the organ's own autoreg). Hormones are part of the endocrine system, so this is extrinsic regulation as the kidneys' action is triggered by hormones (external regulatory mechanism) to restore blood pressure.
• Option d: Transverse feedback is not a standard homeostatic feedback term. Eliminate d.

So the correct answer is c.

Answer:

C. Extrinsic regulation