Q2M1_Quiz 1

Oxygen

What essential gas does the body need to acquire from the air to survive?

Doesn't need much oxygen

When you are resting, your body requires what level of oxygen?

External respiration occurs in the lungs, while internal respiration takes place between blood and body cells.

What is the main difference between external and internal respiration?

- External respiration refers to breathing out carbon dioxide, while internal respiration only involves oxygen.
- External respiration occurs in the lungs, while internal respiration takes place between blood and body cells.
- External respiration involves oxygen exchange in cells, while internal respiration occurs in the lungs.

To trap dust, dirt, and other particles from entering the respiratory systemFilters, warms, and moistens incoming air

What is the primary function of the cilia in the nostrils?

To trap dust, dirt, and other particles from entering the respiratory system
To produce mucus to keep the nasal passages moist
To detect scents and odors in the air
To warm the air before it reaches the lungs

Nasal Cavity

Filters, warms, and moistens incoming air

Trachea

Main airway connecting the throat to the lungs

Diaphragm

Primary muscle that increases lung volume during inhalation

Alveoli

Tiny air sacs where gas exchange occurs

Bronchi

Branches that carry air from the trachea to the lungs

Larynx

What is another name for the voice box?

Diffusion

is a passive process where particles spread out evenly by moving from a region of higher concentration to one of lower concentration, until equilibrium is reached.

The mouth is connected to the windpipe.

If your nose is clogged, why can you breathe through your mouth?

carbon dioxide

Which of the following is a waste product of the body?

carbon dioxide
nitrogen
sulfur
oxygen

Blood carries the oxygen throughout the body.

How does oxygen get to the cells of the body?

Carbon dioxide travels through the blood.
Oxygen passes through the lungs and goes where it is needed.
Blood carries the oxygen throughout the body.
The brain tells the oxygen where to go.

Exhalation

Air pressure in the lungs increases

Exhalation

Diaphragm relaxes and moves upward

Inhalation

Air pressure in the lungs decreases

Inhalation

Lungs expand as they fill with air

Inhalation

Diaphragm contracts and moves downward

inhalation

the diaphragm contracts and moves downward, expanding the chest cavity. This expansion reduces the air pressure within the lungs, making it lower than the atmospheric pressure outside the body. As a result, air flows into the lungs to balance the pressure, bringing in oxygen that will be delivered to the bloodstream.

exhalation

the diaphragm relaxes and moves upward, which decreases the space in the chest cavity. This process increases the air pressure in the lungs, causing air to flow out as the body expels carbon dioxide.

5

How many lobes does human lungs have?

intercostal muscles

The _____ are the most important respiratory muscles for normal speech and singing, for they are the muscles that propel air out through the mouth and nose. These are situated in between the ribs that create and move the chest wall.