Question 1

Which of the following best describes the primary mechanism of hemostasis immediately following a vascular injury?

Accepted Answer

Vasoconstriction and formation of a platelet plug at the site of injury

Question 2

A patient with type O negative blood requires a transfusion. Which blood type is safest to administer?

Accepted Answer

Type O negative

Question 3

Which structure in the heart is responsible for initiating the electrical impulse that triggers cardiac contraction?

Accepted Answer

Sinoatrial (SA) node

Question 4

During the cardiac cycle, which event occurs immediately after ventricular systole?

Accepted Answer

Ventricular diastole

Question 5

Which equation correctly represents cardiac output ($CO$)?

Accepted Answer

$CO = HR 	imes SV$

Question 6

A patient has a mean arterial pressure ($MAP$) of 90 mmHg, a systolic pressure of 120 mmHg, and a diastolic pressure of 80 mmHg. Which formula is used to calculate $MAP$?

Accepted Answer

$MAP = Diastolic + \frac{1}{3}(Systolic - Diastolic)$

Question 7

Which vessel type is primarily responsible for regulating blood flow and pressure through vasoconstriction and vasodilation?

Accepted Answer

Arterioles

Question 8

Which of the following is a major function of the hepatic portal circulation?

Accepted Answer

Delivering nutrient-rich blood from the digestive tract to the liver for processing

Question 9

Which of the following best explains the significance of Starling forces in capillary dynamics?

Accepted Answer

They regulate the movement of water and solutes between blood and interstitial fluid

Question 10

Which structure is NOT part of the lymphatic system?

Accepted Answer

Pancreas

Question 11

Which of the following is a non-specific defense mechanism of the body?

Accepted Answer

Inflammation at the site of injury

Question 12

Which cell type is primarily responsible for cell-mediated immunity?

Accepted Answer

T lymphocytes

Question 13

Which process is responsible for the exchange of oxygen and carbon dioxide between alveoli and blood?

Accepted Answer

Simple diffusion

Question 14

Which of the following is a primary function of the urinary system?

Accepted Answer

Excretion of metabolic wastes and regulation of fluid balance

Question 15

Which ion is most important for maintaining the resting membrane potential in excitable cells?

Accepted Answer

Potassium ($K^+$)

Question 16

Which buffer system is most effective in regulating blood pH?

Accepted Answer

Bicarbonate buffer system

Question 17

Which digestive process is regulated primarily by the hormone gastrin?

Accepted Answer

Secretion of gastric acid in the stomach

Question 18

Which of the following best describes the mechanical digestion of carbohydrates?

Accepted Answer

Chewing and mixing with saliva in the mouth

Question 19

Which phase of the ovarian cycle is characterized by a surge in luteinizing hormone ($LH$) and subsequent ovulation?

Accepted Answer

Ovulatory phase

Question 20

A patient presents with metabolic acidosis. Which organ system is primarily responsible for compensating by increasing the elimination of $CO_2$?

Accepted Answer

Respiratory system

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