Lecture 2 outline quiz

What is Henry's Law about?

• The amount of gas in a solution is proportional to its molecular weight.

• The amount of gas in a solution is proportional to the temperature of the solution.

• The amount of gas in a solution is proportional to the pressure.

• The amount of gas in a solution is inversely proportional to the pressure.

Where does external respiration occur?

• In the heart

• In the lungs

• In the muscles

• In the brain

What does internal respiration refer to?

• Gas exchange between the lungs and the environment.

• Gas exchange between alveoli and pulmonary capillaries.

• Gas exchange between systemic capillaries and peripheral cells.

• Gas exchange between the heart and systemic capillaries.

What happens to the rate of diffusion when the temperature is increased?

• It decreases

• It stays the same

• It increases

• It is not affected by temperature

What is the primary form in which carbon dioxide is transported in the blood?

• Dissolved CO2 gas

• Carbamino compounds

• Bicarbonate ions

• Carboxyhemoglobin

What enzyme facilitates the conversion of carbon dioxide and water to bicarbonate and hydrogen ions in red blood cells?

• Hemoglobin

• Oxyhemoglobin

• Deoxyhemoglobin

• Carbonic anhydrase

How many polypeptides does hemoglobin contain?

• 2

• 3

• 4

• 5

What is at the center of heme where oxygen attaches?

• Carbon

• Iron

• Magnesium

• Zinc

Which factor does NOT affect hemoglobin's affinity for oxygen?

• pH level

• Partial pressure of CO2 (PCO2)

• Temperature

• Hemoglobin concentration

What happens to the oxygen release when the blood becomes more acidic?

• Oxygen release decreases

• Oxygen release remains the same

• Oxygen release increases

• Oxygen binds more strongly to hemoglobin