What is the adaptation of the lungs of the frog for gaseous exchange?

• Thin and flat

• Thin and moist

• Smooth surface and dry

• Large surface and moist

Which of the following is the correct sequence of the pathway of oxygen entering the tracheal system?

• Spiracles, trachea, tracheol, body cells

• Trachea, spiracles, tracheol, body cells

• Tracheol, trachea, spiracles, body cells

• Body cells, trachea, tracheol, spiracles

Asthma is one of the diseases related to the human respiratory system. What is cause of asthma?

• Bronchiole tube becomes smaller

• Alveolus loses its elasticity

• Bronchiole tube is blocked

• Alveolus wall is damaged

What happens to the external intercostal muscle of human during inhalation?

• Relax and become dome shaped

• Contract and become dome shaped

• Contract and flatten

• Relax and flatten

What structure in the respiratory system of the fish increases the surface area for gaseous exchange?

• Gill arch

• Filament

• Operculum

• Base of the mouth

Which of the following structures is the main site of gas exchange in humans?

• Trachea

• Bronchus

• Alveolus

• Diaphgram

During inhalation, the diaphragm ________.

• Relaxes and moves downward

• Contracts and moves upward

• Relaxes and moves upward

• Contracts and moves downward

Which of the following animals uses spiracles for respiration?

• Fish

• Grasshopper

• Earthworm

• Frog

In fish, gaseous exchange occurs in the?

• Skin

• Gills

• Trachea

• Lungs

Which of the following statements about frogs is correct?

• Frogs can only breathe through lungs

• Frogs breathe using gills as adults

• Frogs can breathe through the mouth and lungs

• Frogs breathe using spiracle