Question 1

Which of the following best explains why simple squamous epithelial cells are found lining the alveoli of the lungs?

Accepted Answer

Their thin, flat shape facilitates rapid diffusion of gases.

Question 2

A patient is experiencing muscle cramps due to an imbalance of potassium ions. Which organ system is primarily responsible for regulating this electrolyte balance?

Accepted Answer

Urinary system

Question 3

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

Accepted Answer

Blood clotting after a vessel injury

Question 4

A solution has a pH of 5. Another solution has a pH of 7. How many times more hydrogen ions are present in the first solution compared to the second?

Accepted Answer

$$100$$

Question 5

Which of the following best describes the difference between saturated and unsaturated fats?

Accepted Answer

Unsaturated fats have one or more double bonds, preventing tight packing and making them liquid at room temperature.

Question 6

Which of the following best explains why water is considered vital for life?

Accepted Answer

It has a high heat capacity, acts as a universal solvent, and participates in chemical reactions.

Question 7

A red blood cell placed in a hypotonic solution will:

Accepted Answer

Swell and possibly burst as water enters the cell.

Question 8

Which of the following best describes the function of the sodium-potassium pump in cells?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell against their concentration gradients.

Question 9

Which of the following is true regarding the structure and function of DNA and RNA?

Accepted Answer

DNA is double-stranded and stores genetic information; RNA is single-stranded and involved in protein synthesis.

Question 10

A patient with a third-degree burn on their arm is at risk for which of the following complications?

Accepted Answer

Increased risk of infection due to loss of the protective barrier.

Question 11

Which of the following best describes the role of buffers in maintaining blood pH?

Accepted Answer

Buffers resist changes in pH by accepting or donating protons as needed.

Question 12

Which of the following is a correct sequence of the levels of structural organization in the human body, from simplest to most complex?

Accepted Answer

Chemical, cellular, tissue, organ, organ system, organismal

Question 13

Which of the following best explains why the epidermis is able to regenerate quickly after minor injuries?

Accepted Answer

The most mitotically active cells are located near the basement membrane, close to the dermal blood supply.

Question 14

Which of the following is a function of the integumentary system?

Accepted Answer

Protection against mechanical injury and pathogens

Question 15

Which of the following best describes the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream; exocrine glands secrete their products through ducts to body surfaces or cavities.

Question 16

A patient is diagnosed with jaundice, resulting in yellowing of the skin. Which pigment is most likely responsible for this change?

Accepted Answer

Bilirubin

Question 17

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

Joining monomers to form polymers by removing a molecule of water

Question 18

Which of the following is a property of enzymes that makes them essential for life?

Accepted Answer

They lower the activation energy required for chemical reactions.

Question 19

Which of the following best describes the function of keratin in the skin?

Accepted Answer

It resists desiccation and provides protection from mechanical trauma.

Question 20

A patient is found to have a genetic mutation that alters the sequence of amino acids in a protein. Which level of protein structure is directly affected by this mutation?

Accepted Answer

Primary structure

Module #1 Study Guide: Overview of Anatomy & Physiology, Basic Chemistry, Cells and Tissues, Skin and Body Membranes

Study Guide - Practice Questions

Study Guide - Flashcards