Question 1

Which of the following best describes the primary function of the plasma membrane in human cells?

Accepted Answer

It regulates the movement of substances into and out of the cell.

Question 2

A patient presents with muscle weakness and fatigue. Laboratory tests reveal a deficiency in ATP production. Which organelle is most likely malfunctioning?

Accepted Answer

Mitochondrion

Question 3

Which of the following equations correctly represents the process of cellular respiration?

Accepted Answer

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$

Question 4

A person suffers a deep cut that damages the dermis. Which of the following layers must be repaired for proper healing?

Accepted Answer

Stratum basale

Question 5

Which bone is classified as an irregular bone?

Accepted Answer

Vertebra

Question 6

A patient is unable to extend their forearm at the elbow. Which muscle is most likely injured?

Accepted Answer

Triceps brachii

Question 7

Which of the following best describes the role of calcium ions ($Ca^{2+}$) in muscle contraction?

Accepted Answer

They bind to troponin, causing a conformational change that exposes binding sites on actin.

Question 8

Which of the following is the correct sequence of events in the transmission of a nerve impulse across a synapse?

Accepted Answer

Action potential arrival, calcium influx, neurotransmitter release, postsynaptic response

Question 9

A patient has a spinal cord injury at the level of T12. Which of the following functions is most likely to be affected?

Accepted Answer

Lower limb movement

Question 10

Which of the following best explains why the skin is considered an organ?

Accepted Answer

It consists of multiple tissue types working together to perform specific functions.

Question 11

A patient with osteoporosis is at increased risk for which of the following?

Accepted Answer

Bone fractures

Question 12

Which of the following equations represents the calculation of cardiac output ($CO$)?

Accepted Answer

$CO = HR 	imes SV$

Question 13

A person is exposed to a cold environment. Which physiological response helps maintain core body temperature?

Accepted Answer

Shivering

Question 14

Which of the following best describes the function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

It stores and releases calcium ions ($Ca^{2+}$) during muscle contraction.

Question 15

A patient is unable to feel sensations on the lateral side of their forearm. Which nerve is most likely damaged?

Accepted Answer

Musculocutaneous nerve

Question 16

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

Accepted Answer

Returning interstitial fluid to the bloodstream

Question 17

A person with a blocked thoracic duct would most likely experience which of the following?

Accepted Answer

Edema in the lower limbs

Question 18

Which of the following best describes the role of acetylcholine at the neuromuscular junction?

Accepted Answer

It stimulates muscle contraction by binding to receptors on the muscle cell membrane.

Question 19

A patient is diagnosed with multiple sclerosis, a disease that damages the myelin sheath of neurons. Which of the following is a likely consequence?

Accepted Answer

Slower transmission of nerve impulses

Question 20

Which of the following best explains why red blood cells are biconcave in shape?

Accepted Answer

To increase their surface area for gas exchange

BIO 206: Human Anatomy & Physiology I – Course Syllabus and Schedule Overview

Study Guide - Practice Questions

Study Guide - Flashcards