PQ 8.5 Gas Exchange and O2 and CO2 Transport

What is the primary factor that mediates gas exchange in the lungs and tissues?

• Osmosis

• Diffusion

• Active transport

• Filtration

How is the concentration of specific gases involved in respiration measured?

• Molarity

• Partial pressures

• Volume percentage

• Mass percentage

• 159.1 mmHg

• 105 mmHg

• 40 mmHg

• 760 mmHg

According to Henry's law, the amount of gas that will dissolve in a liquid is proportional to which of the following?

• Temperature and volume

• Partial pressure and solubility

• Concentration gradient and surface area

• Thickness of the barrier and diffusion distance

What is the primary protein responsible for oxygen transport in the blood?

• Myoglobin

• Albumin

• Hemoglobin

• Fibrinogen

What percentage of oxygen is typically transported dissolved in the plasma?

• 2%

• 5%

• 10%

• 20%

What is the term used to describe the relative amount of oxygen carrying capacity that is used?

• Oxygen saturation

• Oxygen capacity

• Oxygen binding

• Oxygen diffusion

What shape does the oxyhemoglobin dissociation curve have?

• Linear

• Exponential

• S-shaped

• Parabolic

Which of the following is NOT a way carbon dioxide is transported in the blood?

• Dissolved in plasma

• Bound to hemoglobin

• As bicarbonate ions

• As carbon monoxide

What enzyme catalyses the reaction of carbon dioxide with water to form carbonic acid?

• Amylase

• Carbonic anhydrase

• Lipase

• Protease