$$P \times V = \text{constant}$$

Question 1

Which of the following best explains why arteries are considered resistance vessels?

Accepted Answer

They have thick walls and maintain high pressure, resisting blood flow.

Question 2

A patient presents with severe swelling in the lower limbs. Which mechanism is most likely impaired, leading to edema?

Accepted Answer

Low plasma albumin levels reducing capillary reabsorption.

Question 3

Which equation correctly describes the relationship between blood flow ($$F$$), pressure difference ($$\Delta P$$), and resistance ($$R$$)?

Accepted Answer

$$F = \frac{\Delta P}{R}$$

Question 4

During vigorous exercise, blood flow to skeletal muscles increases dramatically. Which process is primarily responsible for this change?

Accepted Answer

Reactive hyperemia following temporary blockage.

Question 5

A patient with chronic hypertension is at increased risk for which vascular complication?

Accepted Answer

Aneurysm formation due to weakened arterial walls.

Question 6

Which hormone acts to increase blood pressure by promoting water retention in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 7

A patient experiences a transient ischemic attack (TIA). What distinguishes a TIA from a cerebrovascular accident (CVA)?

Accepted Answer

TIA is a temporary neurological deficit without lasting damage.

Question 8

Which of the following best describes the function of the lymphatic system in fluid recovery?

Accepted Answer

It absorbs excess interstitial fluid and returns it to the bloodstream.

Question 9

Which cell type is responsible for the respiratory burst that destroys pathogens during innate immunity?

Accepted Answer

Neutrophils

Question 10

A patient with AIDS is most likely to have a deficiency in which immune cell?

Accepted Answer

Helper T cells

Question 11

Which antibody class is most abundant in plasma and provides long-term protection?

Accepted Answer

IgG

Question 12

Which structure prevents food from entering the airway during swallowing?

Accepted Answer

Epiglottis

Question 13

According to Boyle’s law, what happens to the pressure in the lungs when the volume increases during inhalation?

Accepted Answer

Pressure decreases inversely to volume.

Question 14

Which equation represents Boyle’s law for the relationship between pressure ($$P) $$and volume ($$V$$)?

Accepted Answer

$$P 	imes V = 	ext{constant}$$

Question 15

Most carbon dioxide in the blood is transported in which form?

Accepted Answer

As bicarbonate ions

Question 16

A patient with respiratory acidosis will likely exhibit which physiological response?

Accepted Answer

Hyperventilation to expel excess CO₂

Question 17

Which type of hypoxia is caused by the inability of tissues to utilize oxygen despite adequate delivery?

Accepted Answer

Histotoxic hypoxia

Question 18

Which process is most important for capillary exchange of gases and nutrients?

Accepted Answer

Diffusion

Question 19

Which immune cell directly kills infected or cancerous cells in cellular immunity?

Accepted Answer

Cytotoxic T cells

Question 20

A patient stands for a prolonged period and faints due to widespread vasodilation. Which type of shock is this?

Accepted Answer

Venous pooling shock

Blood Vessels, Lymphatic & Immune Systems, and Respiratory System: Study Notes

Study Guide - Practice Questions