Question 1

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.)
-rapid clotting of blood due to increasing levels of platelet activity at a site of vessel damage

Accepted Answer

Rapid clotting of blood due to increasing levels of platelet activity at a site of vessel damage is an example of positive-feedback control. As platelets aggregate and release more factors, it leads to further aggregation and release of more factors, amplifying the process until a clot is formed.

Question 2

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.)
-the release of a hormone to lower blood calcium level when it gets too high

Accepted Answer

Negative-feedback control is a physiological mechanism in which the output counteracts the input, leading to a stabilization of the system. In this case, the release of a hormone to lower blood calcium level is the output that counteracts the input (high blood calcium level), thus maintaining homeostasis.

Question 3

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.)
-increased blood flow into muscle tissue in response to a localized increase in carbon dioxide

Accepted Answer

Increased blood flow into muscle tissue in response to a localized increase in carbon dioxide is an example of intrinsic control, where the tissue itself regulates blood flow based on its own metabolic demands.

Question 4

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.)
-increased cardiac activity to elevate blood pressure when systemic pressure is low

Accepted Answer

Negative-feedback control mechanisms work to maintain homeostasis by counteracting deviations from normal. In this case, when systemic blood pressure is low, increased cardiac activity works to elevate blood pressure back to normal levels, exemplifying a negative-feedback mechanism.

Quiz 1: The Foundation of Physiology

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.) -rapid clotting of blood due to increasing levels of platelet activity at a site of vessel damage

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.) -the release of a hormone to lower blood calcium level when it gets too high

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.) -increased blood flow into muscle tissue in response to a localized increase in carbon dioxide

Match the terms labelled a. through d. with their correct physiological events. (Options may be used more than once or not at all.) -increased cardiac activity to elevate blood pressure when systemic pressure is low