Question 1

Which of the following best describes a key difference between the endocrine system and the nervous system in maintaining homeostasis?

Accepted Answer

The nervous system uses neurotransmitters for rapid, short-term responses, while the endocrine system uses hormones for slower, long-lasting effects.

Question 2

A patient experiences a sudden drop in blood pressure. Which system is most likely to respond first to restore homeostasis, and why?

Accepted Answer

The nervous system, because it can send rapid electrical signals to adjust heart rate and vessel diameter.

Question 3

Which of the following is an example of the endocrine system maintaining homeostasis?

Accepted Answer

The pancreas releases insulin to lower blood glucose levels after a meal.

Question 4

Which equation best represents the negative feedback mechanism used by the endocrine system to maintain homeostasis?

Accepted Answer

$$Stimulus \rightarrow Sensor \rightarrow Effector \rightarrow Response \rightarrow Reduced Stimulus$$

Question 5

Which scenario best illustrates the nervous system's role in homeostasis?

Accepted Answer

The hypothalamus detects a rise in body temperature and triggers sweating.

Question 6

Why does the endocrine system generally have longer-lasting effects on homeostasis compared to the nervous system?

Accepted Answer

Hormones are released directly into the bloodstream and act on distant targets over time.

Question 7

A person is exposed to a cold environment. Which system initiates shivering, and what is the primary mechanism?

Accepted Answer

The nervous system, by sending rapid signals to skeletal muscles to generate heat.

Question 8

Which of the following best explains why the nervous system is more suitable for immediate responses to environmental changes?

Accepted Answer

It transmits signals via neurons at high speed, allowing for rapid adjustments.

Question 9

Which of the following is a correct comparison of the signaling molecules used by the nervous and endocrine systems?

Accepted Answer

The nervous system uses neurotransmitters, while the endocrine system uses hormones.

Question 10

A diabetic patient injects insulin to regulate blood glucose. Which system is being supplemented, and what is the effect on homeostasis?

Accepted Answer

The endocrine system is supplemented, restoring glucose homeostasis by lowering blood sugar.

Question 11

Which of the following best describes the speed and duration of responses in the nervous and endocrine systems?

Accepted Answer

Nervous system responses are fast and short-lived; endocrine responses are slower and longer-lasting.

Question 12

Which of the following is an example of a feedback loop involving both the nervous and endocrine systems?

Accepted Answer

The hypothalamus detects low blood osmolarity and signals the pituitary to release ADH.

Homeostasis: Role of the Brain, Nervous System, and Endocrine System

Study Guide - Practice Questions