Gaseous Exchange Quiz

What is the main function of the human respiratory system?

• Excretion

• Gas exchange

• Digestion

• Circulation

Which organ is the primary respiratory organ in humans?

• Liver

• Heart

• Lungs

• Kidneys

What is the primary gas exchanged in the alveoli of the lungs?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

What is the role of hemoglobin in the blood?

• Transporting oxygen

• Digesting food

• Producing energy

• Regulating body temperature

What is the significance of the Bohr effect in the dissociation curve of hemoglobin?

• Increases carbon dioxide binding

• Decreases carbon dioxide binding

• Decreases oxygen binding

• Increases oxygen binding

How is carbon dioxide primarily transported in the blood?

• As oxygen molecules

• As bicarbonate ions

• Bound to hemoglobin

• Dissolved in plasma

What controls the opening and closing of stomata in plants?

• Water availability

• Light intensity

• Temperature

• Soil pH

What triggers the activation of membrane proton pumps in guard cells for stomatal opening?

• Red light

• Blue light

• Yellow light

• Green light

What causes guard cells to lose turgidity and close stomata?

• Cytokinins

• Auxins

• Gibberellins

• Abscisic acid

Which center in the brain regulates the basic breathing rhythm?

• Cerebrum

• Hypothalamus

• Medulla oblongata

• Cerebellum