Q: Which of the following equations correctly calculates the rate of oxygen delivery ($$Q_{O_2$}) to $$tissues, given the oxygen concentration in blood ($$C_{O_2$}) $$and blood flow rate ($$F$$)?

$$Q_{O_2$} = C_{O_2$} \times F$$

Question 1

Which of the following best describes the role of the cystic fibrosis transmembrane conductance regulator (CFTR) channel in the respiratory tract?

Accepted Answer

It allows chloride ions to move from the cell to the apical side, facilitating the formation of saline solution.

Question 2

A patient with a genetic defect in the NKCC (sodium-potassium-chloride co-transporter) would most likely experience which of the following consequences in their respiratory tract?

Accepted Answer

Decreased chloride transport into the cell, resulting in reduced saline solution and thicker mucus.

Question 3

Which step in the blood clotting process is directly responsible for forming a stable mesh that traps red blood cells?

Accepted Answer

Conversion of fibrinogen to fibrin by thrombin

Question 4

Which of the following best explains why calcium blockers can act as blood thinners?

Accepted Answer

Calcium is necessary for the coagulation cascade; blocking it inhibits the formation of fibrin mesh.

Question 5

A patient is given a drug that inhibits tissue plasminogen activator (tPA). What is the most likely physiological effect?

Accepted Answer

Impaired removal of blood clots, increasing risk of thrombosis

Question 6

Which of the following equations correctly calculates the rate of oxygen delivery ($$Q_{O_2$}) to $$tissues, given the oxygen concentration in blood ($$C_{O_2$}) $$and blood flow rate ($$F$$)?

Accepted Answer

$$Q_{O_2$} = C_{O_2$} 	imes F$$

Question 7

If the oxygen concentration in blood is $$200\ \mathrm{mL/L}$$ and the blood flow rate is $$5\ \mathrm{L/min}$$, what is the total oxygen delivery per minute?

Accepted Answer

$$1,000\ \mathrm{mL/min}$$

Question 8

Which of the following best describes the effect of emphysema on gas exchange in the lungs?

Accepted Answer

It decreases the surface area and elasticity of alveoli, reducing oxygen delivery to the blood.

Question 9

A person with pulmonary edema is likely to experience which of the following changes in their lungs?

Accepted Answer

Increased interstitial fluid, which increases the diffusion distance and decreases oxygen delivery.

Question 10

Which of the following statements about hemoglobin's affinity for oxygen is correct?

Accepted Answer

Hemoglobin's affinity for oxygen is highest near the alveoli, facilitating oxygen loading.

Question 11

The cooperative binding of oxygen to hemoglobin results in which of the following changes to the oxygen-hemoglobin dissociation curve?

Accepted Answer

The curve becomes sigmoidal, reflecting increased affinity as more oxygen binds.

Question 12

Which of the following best explains why oxygen moves from the alveoli into the blood in the lungs?

Accepted Answer

Oxygen moves from areas of high partial pressure in the alveoli to low partial pressure in the blood.

Question 13

Which of the following is a direct consequence of a lower affinity of hemoglobin for oxygen in exercising muscle?

Accepted Answer

Hemoglobin releases more oxygen, increasing delivery to tissues.

Question 14

Which of the following best describes the movement of sodium ions during the formation of saline solution in the respiratory tract?

Accepted Answer

Sodium moves paracellularly from the interstitial fluid to the airway, attracted by chloride ions.

Question 15

Which of the following is an example of a zymogen involved in blood clotting?

Accepted Answer

Fibrinogen

Question 16

A patient with a mutation that prevents the activation of plasminogen would most likely experience which of the following?

Accepted Answer

Impaired clot removal, increasing the risk of embolism.

Question 17

Which of the following best explains why water follows salt during the formation of saline solution in the respiratory tract?

Accepted Answer

Water moves osmotically toward areas of higher salt concentration.

Question 18

Which of the following pathologies would most likely result in increased diffusion distance for oxygen in the lungs, thereby reducing oxygen delivery to the blood?

Accepted Answer

Pulmonary edema

Question 19

If a healthy individual has an oxygen delivery rate of $$1,000\ \mathrm{mL/min}$$ and a patient with lung disease has $$500\ \mathrm{mL/min}$$, what is the most likely consequence for the patient during exercise?

Accepted Answer

The patient will have limited capacity to meet increased oxygen demand, leading to fatigue.

Respiratory Physiology, Blood Clotting, and Oxygen Transport: Key Concepts for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드