Question 1

Which of the following best describes the hierarchical organization of the human body from smallest to largest?

Accepted Answer

Subcellular level, cell, tissue, functional unit, organ, organ system, organism

Question 2

A neuron is specialized for which of the following functions?

Accepted Answer

Initiating, integrating, and conducting electrical signals

Question 3

Which of the following is NOT one of the four general categories of cells that make up the human body?

Accepted Answer

Collagen cells

Question 4

What is the principal function performed by epithelial cells?

Accepted Answer

Forming boundaries between body compartments

Question 5

Which best describes the extracellular matrix (ECM)?

Accepted Answer

It surrounds cells; it contains proteins, polysaccharides, and minerals; it provides a scaffold for cell attachment; and it transmits chemical messengers to cells.

Question 6

Which of the following situations best represents a homeostatic mechanism?

Accepted Answer

A person who becomes very nervous begins to sweat profusely.

Question 7

What is the general purpose of positive feedback mechanisms?

Accepted Answer

To bring about a rapid change in the body

Question 8

Which situation describes a feedforward mechanism?

Accepted Answer

The smell of rotten food on a plate triggers the vomit reflex.

Question 9

If the amount of sodium in the blood decreases, what would a negative feedback control mechanism be expected to do?

Accepted Answer

Increase the amount of sodium in the blood

Question 10

Which of the following is an example of positive feedback in physiology?

Accepted Answer

Blood platelets releasing coagulation factors, attracting more platelets

Question 11

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

Accepted Answer

$$X_{average} \approx X_{set\ point}$$

Question 12

During thermoregulation, which physiological response is triggered when room temperature drops?

Accepted Answer

Blood vessels contract and shivering occurs

Question 13

Which organ system is primarily responsible for the transport of blood throughout the body?

Accepted Answer

Circulatory system

Question 14

Which of the following statements about adaptation and acclimatization is correct?

Accepted Answer

Acclimatization refers to improved functioning of an existing homeostatic system due to prolonged exposure.

Question 15

Which of the following is a correct example of a behavioral adaptation for homeostasis?

Accepted Answer

Seeking shade during high temperatures

Question 16

Which type of epithelial tissue is best suited for rapid diffusion of gases in the lungs?

Accepted Answer

Simple squamous epithelium

Question 17

Which of the following is a function of the extracellular matrix (ECM) in connective tissue?

Accepted Answer

Providing resistance to tensile forces

Question 18

A patient is exposed to a cold environment. Which sequence of events best illustrates negative feedback in thermoregulation?

Accepted Answer

Body temperature drops → blood vessels contract → shivering occurs → heat is produced → body temperature returns to reference

Question 19

Which of the following best explains why homeostasis is essential for survival?

Accepted Answer

It enables dynamic stability while adapting to changing conditions.

F1 - Homeostasis

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