Question 1

Which of the following best describes the primary function of the Golgi apparatus in a eukaryotic cell?

Accepted Answer

It packages and modifies proteins for secretion or delivery to other organelles.

Question 2

A patient presents with muscle weakness and delayed reflexes. Laboratory tests reveal abnormal sodium and potassium levels. Which cellular structure is most likely malfunctioning?

Accepted Answer

Plasma membrane ion channels

Question 3

Which of the following equations correctly represents the relationship between force, mass, and acceleration as used in biomechanics?

Accepted Answer

$$F = m 	imes a$$

Question 4

During a biceps curl, which type of muscle contraction occurs as the weight is slowly lowered back to the starting position?

Accepted Answer

Eccentric contraction

Question 5

A patient has a genetic disorder affecting the acetylcholine receptors at the neuromuscular junction. Which process will be most directly impaired?

Accepted Answer

Initiation of muscle contraction

Question 6

Which of the following best explains why the triceps brachii acts as an antagonist during elbow flexion?

Accepted Answer

It relaxes and lengthens to allow the biceps brachii to contract.

Question 7

Which of the following is the correct sequence of events in the sliding filament theory of muscle contraction?

Accepted Answer

Calcium binds to troponin, myosin heads bind to actin, ATP is hydrolyzed, power stroke occurs

Question 8

A 25-year-old athlete suffers a fracture in the diaphysis of the femur. Which type of bone tissue is primarily affected?

Accepted Answer

Compact bone

Question 9

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

Accepted Answer

It stores and releases calcium ions to trigger muscle contraction.

Question 10

A patient is unable to dorsiflex the foot after a sports injury. Which nerve is most likely damaged?

Accepted Answer

Common fibular (peroneal) nerve

Question 11

Which of the following best explains the role of the sodium-potassium pump in maintaining the resting membrane potential of a neuron?

Accepted Answer

It actively transports 3 sodium ions out and 2 potassium ions into the cell, using ATP.

Question 12

Which equation correctly represents the calculation of body mass index (BMI)?

Accepted Answer

$$BMI = \frac{weight\ (kg)}{$$height^2$$\ (m^2$)}$$

Question 13

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

Accepted Answer

Pathological bone fractures

Question 14

Which of the following best describes the function of the central nervous system (CNS)?

Accepted Answer

It integrates sensory information and coordinates responses.

Question 15

A 60-year-old patient has difficulty with voluntary movement and coordination. Which part of the brain is most likely affected?

Accepted Answer

Cerebellum

Question 16

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

Accepted Answer

Release of insulin to lower blood glucose after a meal

Question 17

A patient is diagnosed with a herniated intervertebral disc compressing the spinal cord. Which of the following symptoms is most likely?

Accepted Answer

Loss of sensation and motor function below the level of injury

Question 18

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at sides, palms facing forward

Question 19

A patient is unable to extend the knee after a traumatic injury. Which muscle is most likely damaged?

Accepted Answer

Rectus femoris

Question 20

Which of the following best explains why calcium is essential for muscle contraction?

Accepted Answer

It binds to troponin, causing a conformational change that exposes binding sites on actin.

Anatomy & Physiology I: Course Topics and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards