Breathing Mechanics

8.2 Breathing mechanisms in Humans and Animals

Let's recall 8.1 The types of respiratory system

Multiple Choice

Which animal has the same breathing organ as the animal in the picture?

Multiple Choice

Figure shows the head of a grasshopper being immersed in the water. However, the grasshopper was still alive. Why does the grasshopper still alive?

• It breathes through gills

• Air is absorbed through its skin

• Its respiratory organ is located in the abdomen

• It has two respiratory organs which are lungs and skin

Multiple Choice

What helps to draw air into insect tracheae?

• Opening of mouth

• abdominal pumping (due to muscle contraction)

• closing of spiracles

• contraction of external intercostal muscle

Multiple Choice

Why is oxygen transported into insect muscle cells faster when they are active?

• There is less fluid in the tracheoles and diffusion is faster in air

• Lactic acid is secreted into tracheoles

• There is more fluid in the tracheoles and diffusion is faster in water

• Oxygen can be transported into cells by osmosis

Multiple Select

Name the respiratory structure in frog.

• Trachea

• Gills

• Moist outer skin

• Lungs

Multiple Choice

Apakah yang berlaku apabila dasar rongga mulut katak naik?

What happens when the floor of the buccopharyngeal cavity (the mouth) of frog is raised?

• tekanan udara berkurang

  air pressure decreases

• tekanan udara meningkat

  air pressure increases

• lubang hidung buka

  nostrils open

• glotis tertutup

  glotis closes

Multiple Choice

Namakan struktur yang membantu mekanisma pernafasan ikan.

Name the structures that aid the breathing mechanism of fish.

• mulut

  mouth

• operkulum

  operculum

• sisik

  scales

• tindakan mulut dan operkulum

  mouth movement and operculum

Multiple Choice

what causes the water to flow through the operculum opening of the fish during exhalation?

• lower pressure in the buccal cavity

• lower pressure in the opercular cavity

• higher pressure in the buccal cavity

Multiple Choice

gaseous exchange between blood and water in fish occurs through

• diffusion

• active transport

Multiple Choice

Boyle's law says that the volume and pressure of a gase are inversely proportional, what does this mean?

• if volume increases, then pressure increases

• if volume increases, then pressure decreases

• if volume increases, then pressure stays the same

Multiple Choice

Which of the following shows what happens to the chest cavity when air rushes into the lungs?

• decrease in volume

• deflates

• expands

• relaxes

Multiple Choice

Which of the following happens when you exhale?

• chest cavity expands

• your lungs become smaller

• your chest cavity becomes smaller

• your lungs take in and give off oxygen

Multiple Choice

Which of the following is true for inhalation?

• internal intercostal muscles contract

• external intercostal muscles contract

• rib cage moves downwards and inwards

• rib cage move downwards and outwards

Multiple Choice

What material in a lung model represents the diaphragm

• Y plastic tubes

• the plastic jar

• the plastic sheet

• 2 small plastic balloons

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D