University:
Acadia University
Course:
BIOL 2663 | Marine Biology
Academic year:

2024
Views:

381

Pages:

3
Author:

Nabila n.

Quiz on homeostasis 1. What is the primary function of negative feedback loops in homeostasis? A. To cause irreversible changes in the system B. To maintain a dynamic equilibrium C. To amplify deviations from the set point D. To initiate physiological responses Answer: To maintain a dynamic equilibrium (B) Negative feedback loops work to return the system to a normal state,maintaining a dynamic equilibrium. 2. Which mechanism is responsible for regulating body temperature? A. Thermoregulation B. Osmoregulation C. Blood glucose regulation D. Blood pressure regulation Answer: Thermoregulation (A) Thermoregulation involves mechanisms like sweating and shivering for temperature control. 3. What role do sensors play in the homeostatic process? A. They detect changes in the internal environment. B. They generate corrective actions. C. They amplify physiological responses. D. They produce hormones for regulation. Answer: They detect changes in the internal environment. (A) 2 Sensors detect changes in the internal environment and provide information to control centers. 4. What triggers the release of glucagon in the body? A. Low blood sugar levels B. Dehydration of the body C. High blood sugar levels D. Increased blood pressure Answer: Low blood sugar levels (A) Glucagon is released by the pancreas when blood sugar levels fall to stimulate glucose release. 5. What is the signiﬁcance of homeostasis for living organisms? A. It is irrelevant to the health of an organism. B. It helps organisms grow at a faster rate. C. It prevents all diseases from occurring. D. It ensures the organism can thrive in a changing environment. Answer: It ensures the organism can thrive in a changing environment. (D) Homeostasis is fundamental to the survival of organisms, ensuring stability despite environmental changes. 6. In osmoregulation, how do the kidneys primarily maintain water balance? A. By adjusting the concentration of blood B. By producing glucose C. By excreting all unnecessary electrolytes D. By increasing heart rate Answer: By adjusting the concentration of blood (A) 3 The kidneys adjust the concentration of blood by retaining or excreting water as needed. 7. Which of the following is an example of a positive feedback loop? A. Childbirth process B. Maintaining body temperature C. Regulating blood glucose levels D. Adjusting blood pressure Answer: Childbirth process (A) The childbirth process is a classic example of a positive feedback loop amplifying changes. 8. What effect do baroreceptors have on blood pressure regulation? A. They initiate blood vessel constriction. B. They balance glucose levels. C. They detect changes in blood pressure. D. They release glucagon. Answer: They detect changes in blood pressure. (C) Baroreceptors detect changes in blood pressure and communicate this information for regulation.