Question 1

Which layer of the heart is responsible for the contractile function and is composed primarily of cardiac muscle tissue?

Accepted Answer

Myocardium

Question 2

A patient presents with a blockage in the left coronary artery. Which chamber of the heart is most likely to be affected first?

Accepted Answer

Left ventricle

Question 3

During an EKG, the $$QRS$$ complex represents which of the following events?

Accepted Answer

Ventricular depolarization

Question 4

Which of the following best describes the flow of blood in the pulmonary circulation?

Accepted Answer

Right ventricle → pulmonary arteries → lungs → left atrium

Question 5

Which type of capillary is most commonly found in the kidneys and is specialized for rapid filtration?

Accepted Answer

Fenestrated capillaries

Question 6

A blood sample reveals a high concentration of neutrophils. This finding most likely indicates:

Accepted Answer

A bacterial infection

Question 7

Which of the following equations correctly represents cardiac output ($$CO$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 8

Which vein is considered superficial and is commonly used for venipuncture in the forearm?

Accepted Answer

Cephalic vein

Question 9

Which of the following is NOT a function of plasma in the blood?

Accepted Answer

Carrying oxygen directly

Question 10

The thoracic duct drains lymph from which of the following regions?

Accepted Answer

Left arm, left side of head, and both lower limbs

Question 11

Which structure acts as the first line of defense against pathogens entering through the skin?

Accepted Answer

Keratinized epidermis

Question 12

A patient with a fever is experiencing which type of immune response?

Accepted Answer

Second line of defense

Question 13

Interferons are best described as:

Accepted Answer

Proteins that inhibit viral replication

Question 14

Which of the following is a correct sequence for the activation of the complement system?

Accepted Answer

Antigen binding → complement activation → cell lysis

Question 15

Which cell type is primarily responsible for the secondary immune response?

Accepted Answer

Memory B cells

Question 16

A patient receives a vaccine containing inactivated pathogens. Which immune cells are activated to produce antibodies?

Accepted Answer

B cells

Question 17

Which of the following best describes the function of the heart valves?

Accepted Answer

To prevent backflow of blood

Question 18

A patient with a deficiency in thrombocytes is most likely to experience which of the following?

Accepted Answer

Impaired blood clotting

Question 19

Which of the following equations correctly represents the relationship between blood pressure ($$BP$$), cardiac output ($$CO$$), and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$BP = CO 	imes TPR$$

Question 20

A patient with a severe allergic reaction is experiencing rapid swelling and redness. Which immune response is primarily responsible for these symptoms?

Accepted Answer

Inflammation (second line of defense)

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