Question 1

Which of the following best describes the Frank-Starling law of the heart?

Accepted Answer

The more the cardiac muscle is stretched during filling (increased preload), the stronger the force of contraction, up to a physiological limit.

Question 2

Which type of blood vessel is primarily responsible for regulating blood pressure and flow to tissues?

Accepted Answer

Arterioles

Question 3

Given the equation for blood flow $$Q$$ through a vessel: $$Q = \frac{\Delta P}{R}$$, where $$\Delta P is $$the pressure difference and $$R is $$resistance, what would happen to blood flow if vessel radius doubles, assuming all other factors remain constant?

Accepted Answer

Blood flow would increase by a factor of 16.

Question 4

Which of the following is NOT a function of the lymphatic system?

Accepted Answer

Producing red blood cells in adults

Question 5

A patient has edema in their lower limbs. Which of the following mechanisms is most likely impaired?

Accepted Answer

Lymphatic drainage of interstitial fluid

Question 6

Which structure is responsible for filtering blood and removing old or damaged red blood cells?

Accepted Answer

Spleen

Question 7

Which of the following best describes the role of surfactant in the alveoli?

Accepted Answer

It decreases surface tension, preventing alveolar collapse during exhalation.

Question 8

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 9

Which of the following statements about capillaries is correct?

Accepted Answer

They are the main site of nutrient and gas exchange between blood and tissues.

Question 10

Which immune cell is primarily responsible for antibody production?

Accepted Answer

Plasma cell

Question 11

A patient is exposed to a pathogen for the first time. Which type of immune response will be activated?

Accepted Answer

Both innate and adaptive immune responses, but the innate response acts first

Question 12

Which of the following best explains why lymph flows in one direction through lymphatic vessels?

Accepted Answer

Lymphatic vessels contain valves that prevent backflow.

Question 13

Which of the following is the correct sequence of airflow during inhalation?

Accepted Answer

Nasal cavity → Pharynx → Larynx → Trachea → Bronchi

Question 14

Which of the following is a function of MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

Providing immune defense at mucosal surfaces

Question 15

Which equation correctly relates respiratory volumes during normal breathing?

Accepted Answer

$$Vital\ Capacity = Tidal\ Volume + Inspiratory\ Reserve\ Volume + Expiratory\ Reserve\ Volume$$

Question 16

Which of the following best describes the function of CD8+ T cells?

Accepted Answer

They directly kill infected or cancerous cells.

Question 17

A patient has a mutation in the gene encoding surfactant protein. What is the most likely consequence?

Accepted Answer

Increased alveolar surface tension and increased risk of alveolar collapse

Question 18

Which of the following is true regarding the regulation of blood pressure?

Accepted Answer

Baroreceptors in the carotid sinus and aortic arch detect changes in blood pressure and send signals to the brainstem.

Question 19

Which of the following best describes the process of gas exchange in the alveoli?

Accepted Answer

Oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli.

Comprehensive Study Guide: Blood Vessels, Lymphatic/Immune Systems, and Respiratory System

Study Guide - Practice Questions

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