$$\sum \text{(opposing forces)} = \text{balance}$$

Question 1

Which of the following best describes the relationship between anatomy and physiology?

Accepted Answer

Anatomy focuses on structure and physiology focuses on function; both are closely integrated.

Question 2

A patient’s blood pressure rises above the normal range. Which homeostatic mechanism is most likely to restore it to normal?

Accepted Answer

Negative feedback loop

Question 3

Which of the following is an example of autoregulation at the cellular level?

Accepted Answer

A cell takes up $$K^+ to $$maintain proper cytoplasmic $$[K^+]$$

Question 4

In the control of room temperature, what role does the thermostat play in the homeostatic regulatory mechanism?

Accepted Answer

Control center

Question 5

Which of the following best illustrates a positive feedback loop in human physiology?

Accepted Answer

Blood clotting after vessel injury

Question 6

A person is exposed to cold temperatures. Which sequence correctly describes the negative feedback response to restore homeostasis?

Accepted Answer

Thermoreceptors detect cold → Control center signals → Effectors decrease blood flow to skin and increase shivering

Question 7

Which of the following statements about serous membranes is correct?

Accepted Answer

Serous membranes protect internal organs and allow them to change shape.

Question 8

Which equation best represents the concept of dynamic equilibrium in homeostasis?

Accepted Answer

$$\sum 	ext{(opposing forces)} = 	ext{balance}$$

Question 9

Which of the following is NOT a component of a homeostatic regulatory mechanism?

Accepted Answer

Stimulus generator

Question 10

A patient’s body temperature rises rapidly due to infection. Which feedback mechanism is most likely to be activated?

Accepted Answer

Negative feedback to decrease temperature

Question 11

Which of the following best describes extrinsic regulation?

Accepted Answer

Responses controlled by nervous and endocrine systems

Question 12

Which of the following scenarios is an example of a failure in homeostasis?

Accepted Answer

Persistent high blood pressure leading to disease

Question 13

Which of the following is the correct sequence for a homeostatic regulatory mechanism?

Accepted Answer

Receptor → Control center → Effector

Question 14

Which formula best represents the concept of maintaining a variable close to a set point in homeostasis?

Accepted Answer

$$|X - 	ext{set point}| \leq \epsilon$$

Question 15

Which of the following is a real-life example of negative feedback in the human body?

Accepted Answer

Regulation of blood glucose by insulin

Question 16

Which anatomical term describes the position of the body when standing upright, facing forward, with arms at the sides and palms facing forward?

Accepted Answer

Anatomical position

Question 17

A cell in the intestine secretes digestive enzymes in response to food. Which type of homeostatic regulation does this illustrate?

Accepted Answer

Autoregulation

Question 18

Which of the following best describes the effect of positive feedback on homeostasis?

Accepted Answer

It amplifies the original change and moves the body away from homeostasis.

Question 19

Which of the following is a correct application of medical terminology in anatomy and physiology?

Accepted Answer

Using precise anatomical terms to describe directions and sections

Question 20

Which of the following best explains why failure of physiological systems to maintain homeostasis results in disease?

Accepted Answer

Dynamic equilibrium is lost, leading to abnormal conditions.

Chapter 1

Study Guide - Practice Questions