Gaseous exchange

3 features of an efficient gaseous exchange surface are:

• moist, low surface area, thin walled

• moist, high surface area, thin walled

• dry, high surface area, thin walled

• moist, low surface area, thin walled

Identify the structure.

• Gills

• Gill filament

• Gill filaments

Name part marked A.

• Stomata

• Nucleus

• Stoma

• Epidermal cell

Name the phenomenon illustrated in the diagram shown

• Current flow

• Counter current flow

• Current counter flow

• Gaseous exchange

What is the significance of counter current flow?

• It prevents blood and water from mixing

• To create a steeper concentration gradient

• To prevent Oxygen and Carbon (IV) oxide from mixing

• To remove Nitrogen gas

Which of the following is not true during inhalation?

• Diaphragm flattens

• External intercostal muscles contract

• Internal intercostal muscles relax

• Volume of thoracic cavity decreases

Which of the following is not true during exhalation?

• Diaphragm flattens

• External intercostal muscles relax

• Internal intercostal muscles contract

• Volume of thoracic cavity decreases

What does Bell jar represent in human being?

• Trachea

• Lung

• Rib cage

• Diaphragm

What does Balloon represent in human being?

• Trachea

• Lung

• Rib cage

• Diaphragm

What does Glass tube represent in human being?

• Trachea

• Lung

• Rib cage

• Diaphgram