Q: Which equation correctly represents the Henderson-Hasselbalch equation for blood pH?

$$pH = pK_a + \log_{10} \left( \frac{[$$HCO_3$$^-]}{0.03 \times P_{CO_2$}} \right)$$

Question 1

Which of the following best describes the primary difference between innate and adaptive immunity?

Accepted Answer

Innate immunity provides immediate defense against infection, while adaptive immunity develops more slowly and is highly specific.

Question 2

A patient is exposed to a new strain of influenza virus. Which immune cells are primarily responsible for producing antibodies against this virus?

Accepted Answer

B lymphocytes

Question 3

Which of the following is NOT a function of the conducting zone of the respiratory system?

Accepted Answer

Gas exchange between air and blood

Question 4

During inspiration, which of the following pressure changes occurs in the thoracic cavity?

Accepted Answer

Intrapleural pressure becomes more negative

Question 5

Which equation correctly represents the Henderson-Hasselbalch equation for blood pH?

Accepted Answer

$$pH = pK_a + \log_{10} \left( \frac{[$$HCO_3$$^-]}{0.03 	imes P_{CO_2$}} ight)$$

Question 6

A patient with chronic bronchitis is experiencing difficulty exhaling air from the lungs. Which of the following best describes the underlying mechanism?

Accepted Answer

Bronchoconstriction increases airway resistance, making expiration more difficult.

Question 7

Which of the following statements about B and T lymphocyte activation is correct?

Accepted Answer

Both B and T lymphocytes require antigen presentation by MHC molecules for activation.

Question 8

Which of the following best explains why carbon dioxide is more soluble in blood than oxygen?

Accepted Answer

Carbon dioxide reacts with water to form bicarbonate, increasing its solubility.

Question 9

A patient is experiencing metabolic acidosis. Which compensatory mechanism will the body use to restore acid-base balance?

Accepted Answer

Increase respiratory rate to expel CO$$_2$$

Question 10

Which of the following is the correct sequence of events in urine formation in the nephron?

Accepted Answer

Filtration → Reabsorption → Secretion

Question 11

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

Accepted Answer

Surfactant decreases surface tension, making it easier for the alveoli to expand during inspiration.

Question 12

A patient with severe asthma is given a bronchodilator. What is the expected physiological effect?

Accepted Answer

Decreased airway resistance and increased airflow

Question 13

Which of the following is a function of the kidneys?

Accepted Answer

Regulation of blood pH

Question 14

Which of the following best describes the role of the pleural cavity in lung function?

Accepted Answer

It maintains a negative pressure that keeps the lungs inflated.

Question 15

A patient is found to have a blood pH of 7.25, a low bicarbonate level, and a normal CO$$_2$$ level. Which acid-base disturbance is most likely present?

Accepted Answer

Metabolic acidosis

Question 16

Which of the following is a correct description of the function of alveoli?

Accepted Answer

Alveoli are the primary site of gas exchange between air and blood.

Question 17

Which of the following mechanisms is responsible for the majority of oxygen transport in the blood?

Accepted Answer

Bound to hemoglobin

Question 18

A patient with emphysema has decreased alveolar surface area. What effect does this have on gas exchange?

Accepted Answer

Decreases the rate of oxygen and carbon dioxide exchange

Question 19

Which of the following best describes the effect of hyperventilation on blood pH?

Accepted Answer

Hyperventilation decreases CO$$_2$$ levels, causing alkalosis.

Exam 5

Guida di studio - Domande di pratica

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