Question 1

Which of the following best explains why arteries are considered elastic and how this property affects blood flow during the cardiac cycle?

Accepted Answer

Elasticity enables arteries to stretch and recoil, maintaining continuous blood flow during diastole.

Question 2

A patient has elevated levels of ANP (Atrial Natriuretic Peptide) and BNP (Brain Natriuretic Peptide). What is the most likely effect on their cardiovascular system?

Accepted Answer

Decreased blood volume and reduced blood pressure due to increased sodium excretion.

Question 3

Which vessel has the highest elastic fibers and why is this important for its function?

Accepted Answer

Aorta, to absorb the pressure from ventricular contraction and maintain blood flow.

Question 4

If a person experiences hypoxia, which physiological response is most likely to occur in the respiratory system?

Accepted Answer

Increased respiratory rate and depth to enhance oxygen uptake.

Question 5

Which equation correctly represents Boyle's Law as it applies to pulmonary ventilation?

Accepted Answer

$$P_1$$ $$V_1$$ = $$P_2$$ $$V_2$$

Question 6

Which of the following best describes the function of alveolar macrophages in the respiratory system?

Accepted Answer

They phagocytose pathogens and debris within the alveoli.

Question 7

A patient has a blockage in the superior mesenteric artery. Which organ system is most likely to be affected?

Accepted Answer

Digestive system

Question 8

Which of the following is a correct description of the function of cytotoxic T cells in the immune response?

Accepted Answer

They directly kill infected or abnormal cells.

Question 9

During exercise, which physiological change occurs to increase oxygen delivery to tissues?

Accepted Answer

Increased heart rate and vasodilation of skeletal muscle arteries.

Question 10

Which of the following best explains the role of the lymphatic system in maintaining fluid balance?

Accepted Answer

It returns excess interstitial fluid to the bloodstream via lymphatic vessels.

Question 11

Which structure is responsible for the production of immunoglobulins?

Accepted Answer

B lymphocytes (plasma cells)

Question 12

A patient is diagnosed with asthma. Which of the following best describes the underlying pathophysiology?

Accepted Answer

Chronic inflammation and bronchoconstriction causing airway narrowing.

Question 13

Which of the following is the main function of the respiratory defense system?

Accepted Answer

To filter, warm, and humidify incoming air and trap pathogens.

Question 14

Which of the following best describes the effect of increased CO$$_2 in $$the blood on the respiratory system?

Accepted Answer

It stimulates chemoreceptors, increasing respiratory rate and depth.

Question 15

Which of the following is a correct application of the concept of resistance in blood vessels?

Accepted Answer

Resistance is inversely proportional to vessel diameter, so smaller vessels have higher resistance.

Question 16

Which of the following best describes the function of the thymus gland?

Accepted Answer

It is the site of T lymphocyte maturation and differentiation.

Question 17

Which of the following is the correct sequence of airflow from the nose to the alveoli?

Accepted Answer

Nose → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

Question 18

Which of the following best explains why it is better to breathe through the nose rather than the mouth?

Accepted Answer

Nasal breathing filters, warms, and humidifies air before it reaches the lungs.

Question 19

Which of the following is the main function of lymph nodes?

Accepted Answer

To filter lymph and trap pathogens for immune response.

Question 20

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

Accepted Answer

It decreases surface tension, allowing alveoli to remain open during respiration.

Chapters 21-23: The Circulatory, Lymphatic, and Respiratory Systems – Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard