Question 1

Which cell type in the stomach is responsible for secreting hydrochloric acid, and what is the primary function of this secretion?

Accepted Answer

Parietal cell; denatures proteins and activates pepsinogen

Question 2

A patient presents with jaundice due to excessive breakdown of red blood cells. Which molecule is most directly responsible for the yellow coloration seen in this condition?

Accepted Answer

Bilirubin

Question 3

Which of the following best describes the role of transferrin in the body?

Accepted Answer

It transports iron in the bloodstream after RBC destruction.

Question 4

Which structure in the heart is responsible for initiating the electrical impulse that triggers each heartbeat?

Accepted Answer

Sinoatrial (SA) node

Question 5

A blockage in which artery would most directly reduce blood flow to the brain, potentially causing a stroke?

Accepted Answer

Carotid artery

Question 6

Which part of the lymph node is primarily responsible for filtering lymph and housing immune cells such as lymphocytes?

Accepted Answer

Cortex

Question 7

During inhalation, air passes through several structures before reaching the alveoli. Which is the correct order of airflow?

Accepted Answer

Nasal cavity → pharynx → larynx → trachea → bronchi → alveoli

Question 8

Which lung structure is the primary site of gas exchange between air and blood?

Accepted Answer

Alveoli

Question 9

A patient with kidney stones is experiencing pain in the area where urine passes from the kidney to the bladder. Which structure is most likely affected?

Accepted Answer

Ureter

Question 10

Which endocrine gland secretes insulin, and what is the primary function of this hormone?

Accepted Answer

Pancreas; decreases blood glucose

Question 11

Which hormone is correctly matched with its function?

Accepted Answer

Aldosterone; promotes sodium reabsorption in the kidneys

Question 12

A patient is diagnosed with syphilis. Which of the following best describes this sexually transmitted disease?

Accepted Answer

It is caused by a bacterium and can progress to affect the nervous system if untreated.

Question 13

Which of the following best describes the function of macrophages in the context of red blood cell destruction?

Accepted Answer

They engulf and digest old or damaged RBCs.

Question 14

If the atrioventricular (AV) node is damaged, which of the following is the most likely immediate effect on heart function?

Accepted Answer

The electrical signal from the atria to the ventricles will be delayed or blocked.

Question 15

Which of the following arteries is a direct branch of the aorta and supplies blood to the lower limbs?

Accepted Answer

Femoral artery

Question 16

Which hormone is released in response to low blood calcium levels, and what is its effect?

Accepted Answer

Parathyroid hormone; increases blood calcium

Question 17

A patient with a blocked trachea would have difficulty with which physiological process?

Accepted Answer

Transporting air to the lungs

Question 18

Which part of the nephron is primarily responsible for the filtration of blood in the kidney?

Accepted Answer

Glomerulus

Question 19

Which of the following best describes the function of the pulmonary veins?

Accepted Answer

They carry oxygenated blood from the lungs to the left atrium.

Question 20

A patient with Addison's disease has low levels of aldosterone. Which of the following symptoms would most likely be observed?

Accepted Answer

Low blood sodium and high blood potassium

Comprehensive Study Guide for Anatomy and Physiology Lab Final Exam

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