Respiratory System Quiz

What occurs to air as it is inspired into the respiratory system?

• Filtered.

• Humidified

• Warmed

• All of these

The efficiency of gills in fish is derived from ________________

• A. The countercurrent flow of water over the gills

• B. The increasing temperature of blood within the gills

• C. Continuous diffusion of oxygen into the blood

• A and B

• A and C

Describe the primary purpose of countercurrent flow in the gills of fish.

• To maximize oxygen concentration in the water

• To facilitate nutrient absorption

• To maintain a constant water temperature

• To prevent water loss

In countercurrent flow, identify direction does water flow in relation to the blood flow in the gill filaments of fish.

• Same direction

• Opposite direction

• Random direction

• Perpendicular direction

Identify structure in fish gills increases the surface area available for gas exchange during countercurrent flow.

• Gill arches

• Gill rakers

• Gill filaments

• Gill plates

When a bird breathes, air moves from the lung into the _________________.

• Posterior air sacs

• Anterior air sacs

• Trachea

• Pharynx

Adult amphibians are lacking or have a reduced diaphragm, so breathing via lungs is forced. this is called:

• Negative pressure breathing

• Forced air breathing

• Positive pressure breathing

• Terrestrial breathing

• None of the above

All gases exchanged between air and blood in mammals occurs across the walls of the

• Trachea

• Bronchi

• Alveoli

• Bronchioles

What is the primary function of the respiratory system in humans?

• Transportation of nutrients

• Regulation of body temperature

• Gas exchange

• Production of hormones

Which structure in the respiratory system is responsible for filtering and moistening incoming air?

• Larynx

• Trachea

• Alveoli

• Nasal cavity