Question 1

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at the sides with palms facing forward, and feet parallel

Question 2

A patient presents with a deep cut on the anterior surface of the forearm. Which directional term best describes the location of the injury relative to the elbow?

Accepted Answer

Distal

Question 3

Which of the following is a correct example of a negative feedback mechanism in the human body?

Accepted Answer

Regulation of blood glucose levels by insulin

Question 4

Which of the following best describes the function of mitochondria in a human cell?

Accepted Answer

They produce ATP through cellular respiration, providing energy for cellular activities.

Question 5

A solution has a hydrogen ion concentration of $1 	imes 10^{-7}$ M. What is the pH of this solution?

Accepted Answer

$7$

Question 6

Which of the following best explains why enzymes are essential for metabolic reactions in the body?

Accepted Answer

They lower the activation energy required for reactions to occur.

Question 7

A patient is diagnosed with osteoporosis, a condition characterized by decreased bone mass and density. Which of the following best explains the underlying cause?

Accepted Answer

An imbalance between osteoclast and osteoblast activity, favoring bone resorption

Question 8

Which of the following is a function of the plasma membrane in human cells?

Accepted Answer

Regulating the movement of substances into and out of the cell

Question 9

A patient suffers a burn that destroys both the epidermis and the entire dermis. Which type of burn is this, and what is a likely consequence?

Accepted Answer

Third-degree burn; loss of sensation due to nerve destruction

Question 10

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 11

A patient is unable to extend their knee after an injury. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 12

Which of the following best describes the function of the sodium-potassium pump ($Na^+/K^+$ ATPase) in neurons?

Accepted Answer

It maintains the resting membrane potential by moving $3$ $Na^+$ ions out and $2$ $K^+$ ions into the cell per ATP hydrolyzed.

Question 13

A patient has a tumor compressing the dorsal root of a spinal nerve. Which symptom is most likely to occur?

Accepted Answer

Loss of sensory function in the affected area

Question 14

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

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream, while exocrine glands secrete their products through ducts to an epithelial surface.

Question 15

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

Accepted Answer

Protection against mechanical injury, pathogens, and dehydration

Question 16

A patient is unable to abduct their arm at the shoulder joint. Which muscle is most likely injured?

Accepted Answer

Deltoid

Question 17

Which of the following best describes the function of cerebrospinal fluid (CSF)?

Accepted Answer

It cushions the brain and spinal cord, provides nutrients, and removes waste products.

Question 18

A patient presents with difficulty breathing and numbness in the diaphragm after a neck injury. Which spinal nerve is most likely affected?

Accepted Answer

Phrenic nerve (originating from C3-C5)

Question 19

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

Accepted Answer

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

Question 20

A patient is unable to feel pain or temperature on the left side of their body below the waist after a spinal cord injury. Which tract is most likely damaged?

Accepted Answer

Right spinothalamic tract

Anatomy and Physiology I: Course Competencies and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards