CHAPTER 8.2 : BREATHING MECHANISM IN ANIMALS

CHAPTER 8.2: BREATHING MECHANISM IN ANIMALS

Have you ever wondered how they inhale and exhale air?

Multiple Choice

Recall 1: Name the respiratory structure in insects.

• Gills

• Lungs

• Tracheal system

• Moist skin

Multiple Choice

Recall 2: Which of the following is NOT the respiratory structure of a salamander?

• Moist skin

• Lungs

• Buccal-pharyngeal

• Gills

Multiple Choice

Recall 3: Name the structure that has a large surface area for gaseous exchange in gill?

• Gill rakers

• Gill arch

• Lamella

• Opercullum

Multiple Choice

Q1: Name the structure that controls the movement of air into and out of the tracheal system of an insect.

• Abdominal muscle

• Trachea

• Tracheoles

• Wings

Multiple Choice

Q2: Name the pore found in the insect body that allows the entering of air from the atmosphere?

• Stoma

• Hydathode

• Spiracle

• Lenticel

Multiple Select

Q3: How the carbon dioxide can be released out from the tracheal system?

• Abdominal muscle contracts

• Abdominal muscle relaxes

• Increase air pressure in tracheal system

• Decrease air pressure in tracheal system

Multiple Choice

Q4: Which breathing structure is used in frogs during the inactive state or hibernation?

• Moist skin

• Lungs

• Bucco-pharyngeal

Multiple Choice

Q5: Which of the following is NOT involved during the inhalation of a frog?

• Air enters nostril

• Floor of bucco-pharyngeal cavity lowered

• Glottis opens

• Air pressure increases in lungs

Multiple Choice

Q6: How the air is forced out from the nostril of a frog?

• Mouth opens

• Lungs contract

• Glottis closes

• Air pressure increases in bucco-pharyngeal cavity

Multiple Select

Q7: What happens during inhalation in a fish?

• Mouth opens

• Mouth closes

• Opercullum opens

• Opercullum closes

Multiple Choice

Q8: Which of the following is NOT involved during inhalation of a fish?

• Water is entering through the mouth

• Buccal cavity floor is lowered

• Pressure in buccal cavity decreases

• Opercullum opens

Multiple Select

Q9: What happens during exhalation in a fish?

• Mouth opens

• Mouth closes

• Opercullum opens

• Opercullum closes

Multiple Choice

Q10: Which of the following is NOT involved during the exhalation of a seahorse?

• Water flows through the lamellae for gaseous exhange

• Opercullum opens

• Pressure increases in buccal cavity

• Volume in buccal cavity increases

Multiple Choice

Bonus: The changes in volume and pressure in the respiratory cavity control the breathing mechanism of humans and animals.

• TRUE

• FALSE