Question 1

Which of the following best describes the function of the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate, digestion, and respiratory rate.

Question 2

A patient presents with a fracture in the femur. Which type of bone is the femur classified as, and what is its primary function?

Accepted Answer

Long bone; supports weight and facilitates movement.

Question 3

Which of the following best explains the negative feedback mechanism in homeostasis?

Accepted Answer

A process that reverses a deviation from the set point to maintain stability.

Question 4

During an action potential, which ion is primarily responsible for the depolarization phase in a neuron?

Accepted Answer

Sodium ($Na^+$)

Question 5

A patient is diagnosed with anemia due to a lack of vitamin B12. Which process is most directly affected?

Accepted Answer

Production of hemoglobin in red blood cells

Question 6

Which of the following best describes the function of the sarcomere in skeletal muscle contraction?

Accepted Answer

It is the structural unit where actin and myosin interact to produce contraction.

Question 7

A patient has a blood type of AB. Which statement about their blood compatibility is correct?

Accepted Answer

They can receive blood from any ABO blood type.

Question 8

Which of the following best explains the role of the sinoatrial (SA) node in the heart?

Accepted Answer

It initiates the electrical impulses that set the pace for the heart rate.

Question 9

Which of the following is the correct sequence of structures that air passes through during inhalation?

Accepted Answer

Pharynx → Larynx → Trachea → Bronchi → Alveoli

Question 10

A patient is experiencing metabolic acidosis. Which of the following compensatory mechanisms is most likely to occur?

Accepted Answer

Increased respiratory rate to expel $CO_2$

Question 11

Which of the following best describes the function of the nephron in the kidney?

Accepted Answer

It filters blood, reabsorbs needed substances, and secretes wastes to form urine.

Question 12

A patient with a blocked lymphatic vessel in the leg is most likely to experience which of the following?

Accepted Answer

Edema due to accumulation of interstitial fluid

Question 13

Which of the following best explains why the left ventricle of the heart has a thicker wall than the right ventricle?

Accepted Answer

It pumps blood to the entire body, requiring higher pressure.

Question 14

Which of the following is the correct formula for calculating cardiac output ($CO$)?

Accepted Answer

$CO = HR 	imes SV$

Question 15

A patient is unable to produce sufficient parathyroid hormone. Which of the following imbalances is most likely to occur?

Accepted Answer

Hypocalcemia

Question 16

Which of the following best describes the function of surfactant in the lungs?

Accepted Answer

It decreases the surface tension in the alveoli, preventing collapse.

Question 17

A patient with a spinal cord injury at the cervical level is most likely to experience which of the following?

Accepted Answer

Loss of sensation and movement in both upper and lower limbs.

Question 18

Which of the following best explains the process of synaptic transmission at a chemical synapse?

Accepted Answer

Neurotransmitters are released from the presynaptic neuron and bind to receptors on the postsynaptic neuron.

Question 19

Which of the following best describes the function of the hepatic portal system?

Accepted Answer

It transports nutrient-rich blood from the digestive tract to the liver for processing.

Question 20

A patient is found to have a mutation affecting the structure of collagen. Which tissue type is most likely to be affected?

Accepted Answer

Connective tissue

Anatomy & Physiology I: Syllabus and Core Competencies Study Guide

Study Guide - Practice Questions