Question 1

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

Accepted Answer

Because it pumps blood to the entire body, requiring greater force to overcome systemic resistance.

Question 2

A patient has a mutation that prevents the formation of gap junctions in their cardiac muscle cells. Which of the following would most likely result from this mutation?

Accepted Answer

The heart muscle would contract in a less coordinated, unsynchronized manner.

Question 3

Which vessel carries oxygenated blood from the placenta to the fetus during prenatal development?

Accepted Answer

Umbilical vein

Question 4

A blockage in the superior mesenteric artery would most directly affect which digestive organ(s)?

Accepted Answer

Jejunum and ileum

Question 5

Which of the following best describes the function of the juxtaglomerular apparatus in the kidney?

Accepted Answer

It regulates blood pressure by releasing renin in response to low blood flow or sodium.

Question 6

Which of the following is TRUE regarding the hepatic portal system?

Accepted Answer

It directs nutrient-rich blood from the digestive organs to the liver for processing before entering systemic circulation.

Question 7

A patient is unable to produce surfactant in their alveoli. Which of the following is the most likely consequence?

Accepted Answer

Collapse of alveoli due to increased surface tension, making gas exchange difficult.

Question 8

Which of the following best explains why women are more susceptible to urinary tract infections (UTIs) than men?

Accepted Answer

The female urethra is shorter and closer to the anus, making bacterial entry easier.

Question 9

Which of the following is the correct sequence for the path of air from the external environment to the site of gas exchange in the lungs?

Accepted Answer

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

Question 10

Which of the following best describes the main function of the lymph nodes?

Accepted Answer

They filter lymph, trapping pathogens and supporting immune cell activity.

Question 11

A patient is hyperventilating due to anxiety. What effect will this have on their blood pH, and why?

Accepted Answer

Blood pH will increase because more CO$$_2 is $$expelled, reducing carbonic acid.

Question 12

Which of the following is a function of the large intestine?

Accepted Answer

Absorption of water and electrolytes, and formation of feces

Question 13

Which of the following structures is responsible for producing the hormone that maintains the corpus luteum in early pregnancy?

Accepted Answer

Developing embryo (syncytiotrophoblast)

Question 14

Which of the following best describes the role of the ascending limb of the loop of Henle?

Accepted Answer

It is impermeable to water and reabsorbs ions such as Na$$^+$$ and Cl$$^-.$$

Question 15

Which of the following is the correct order of the three primary germ layers formed during gastrulation?

Accepted Answer

Ectoderm, mesoderm, endoderm

Question 16

Which of the following best explains why the testes are located in the scrotum rather than inside the abdominal cavity?

Accepted Answer

To maintain a temperature lower than core body temperature, which is necessary for sperm production

Question 17

Which of the following is a key difference between arteries and veins?

Accepted Answer

Arteries carry blood away from the heart and have thicker, more muscular walls; veins carry blood toward the heart and have valves.

Question 18

Which of the following is TRUE regarding the function of the diaphragm during breathing?

Accepted Answer

It contracts and flattens during inhalation, increasing thoracic volume and drawing air into the lungs.

Question 19

Which of the following best describes the function of the corpus luteum during the luteal phase of the ovarian cycle?

Accepted Answer

It produces estrogen and progesterone to prepare the endometrium for possible implantation.

Question 20

Which of the following is the main function of the villi and microvilli in the small intestine?

Accepted Answer

To increase surface area for nutrient absorption

Question 21

Which of the following best describes the path of blood through the heart, starting with deoxygenated blood returning from the body?

Accepted Answer

Right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary arteries → lungs → pulmonary veins → left atrium → bicuspid (mitral) valve → left ventricle → aortic valve → aorta

Comprehensive Study Notes: Cardiovascular, Lymphatic, Respiratory, Digestive, Urinary, Reproductive, and Embryological Systems

Study Guide - Practice Questions

Study Guide - Flashcards