Question 1

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

Accepted Answer

Structure and function are inseparable; anatomy focuses on structure, and physiology focuses on function.

Question 2

Which level of organization is correctly matched with its example?

Accepted Answer

Tissue level – layers of tissue in the stomach wall

Question 3

Which of the following is NOT a homeostatically regulated factor?

Accepted Answer

Genetic code sequence

Question 4

Which body system is primarily responsible for transporting nutrients, O$$_2$$, CO$$_2$$, wastes, electrolytes, and hormones throughout the body?

Accepted Answer

Circulatory system

Question 5

Which statement about the internal environment is correct?

Accepted Answer

The internal environment refers to the extracellular fluid (ECF) surrounding cells.

Question 6

Which of the following best describes a negative feedback loop?

Accepted Answer

The response opposes the initial change, stabilizing the variable.

Question 7

Which of the following is an example of positive feedback in the human body?

Accepted Answer

Childbirth contractions

Question 8

During exercise, muscle cells increase their use of O$$_2. $$Which type of control is primarily responsible for adjusting local blood flow to meet this demand?

Accepted Answer

Intrinsic control

Question 9

Which of the following best explains why homeostasis does NOT mean equilibrium?

Accepted Answer

Homeostasis maintains a dynamic steady state with constant movement but no net change.

Question 10

A patient has a disruption in homeostasis that is no longer compatible with survival. What is the likely outcome?

Accepted Answer

The patient will die if homeostasis is not restored.

Question 11

Which of the following is a correct sequence for a negative feedback mechanism?

Accepted Answer

Stimulus → Sensor → Integrating Center → Effector → Response

Question 12

Which system acts through electrical signals to control rapid responses and higher functions such as consciousness and memory?

Accepted Answer

Nervous system

Question 13

Which of the following is a function of the urinary system in maintaining homeostasis?

Accepted Answer

Regulating the volume and electrolyte composition of the internal environment

Question 14

Which of the following best describes the role of the effector in a feedback mechanism?

Accepted Answer

Causes a change to compensate for deviation

Question 15

Which of the following is an example of a feedforward mechanism?

Accepted Answer

Salivation in anticipation of food

Question 16

Which of the following equations best represents the cellular process that requires homeostasis for survival?

Accepted Answer

$$	ext{Food} + 	ext{O}_2 ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{energy}$$

Question 17

Which of the following is a correct statement about positive feedback?

Accepted Answer

It reinforces the stimulus, moving the variable farther from the set point.

Question 18

In the childbirth process shown in the image, which hormone is primarily responsible for stimulating uterine contractions?

Accepted Answer

Oxytocin

Question 19

Which of the following best describes the role of the integrating center in a feedback mechanism?

Accepted Answer

It compares sensor input to a set point and initiates a response.

Question 20

Which of the following is a consequence of severe disruption of homeostasis?

Accepted Answer

Pathophysiology and potential death

Homeostasis: The Foundation of Physiology

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