C8: RESPIRATORY SYSTEM IN HUMAN AND ANIMALS (PART 1)

The diagram above shows the respiratory system of an insect. What is K?

• Tracheole

• Muscle

• Spiracle

• Trachea

Which of the following is true about the structural adaptation of the tracheoles in insects for gaseous exchange?

I. A large number of tracheoles provides a large total surface area for the exchange of gases.

II. The tracheole wall is thin and moist. This allows oxygen gas to diffuse into the cells while carbon dioxide quickly diffuses out of the cells into the tracheole

• I and II

• I only

• II only

• None of the above

Which of the following are adaptations of a fish gill filaments for respiration?

I. The gill filaments has thin membrane to filter the bacteria in the water.

II. The gill filaments are supplied with numerous blood capillaries.

III. The gill filaments have many lamellae to increase the respiratory surface.

IV. The direction of blood flow in gill filament is opposite of the direction of water flow.

• I and II only

• III and IV only

• II, III and IV only

• I, II, III and IV only

Which of the following structure is involved in breathing in a frog?

• Buccopharyngeal cavity

• Diaphragm

• Intercostal muscles

• Rib cage

Which of the following is the adaptation of skin of frogs for gaseous exchange?

• Moist and cold

• Slippery and slimy

• Thin and folded

• Moist and rich in blood capillaries

The diagram shows the condition of the rib cage and diaphragm during breathing. What happens to muscle X and Y during this process?

• Muscle Y relaxes

• Muscle Y contract

Which one is not features to ensure an efficient gaseous exchange with the surroundings?

• Moist surface of respiratory structures

• Thin respiratory structures such as the walls of blood capillaries

• Dry outer skin causes the respiratory gases to dissolve and diffuse easily

• Large surface area of respiratory structures

Name the respiratory structure in fish.

• Lungs

• Gills

• Moist outer skin

• Trachea

Name the respiratory structure in frog.

• Trachea

• Gills

• Moist outer skin

Name the respiratory structure in insects.

• Lungs

• Gills

• Moist outer skin

• Trachea