Respiratory System

are tiny sac-like structures present at the end of bronchioles.

Alveoli

Which of the following processes is highly regulated by a thin muscle to allow the movement of gases in and out of the lungs?

Breathing

are two air passageway tubes that branch out from the trachea and directs the air directly into the lungs. They branch out into smaller tubes known as brionchioles.

Bronchi

takes place within each cell in the body. The cells convert energy from glucose from the food that we eat into adenosine triphosphate (ATP). Resulting ATP is utilized to provide energy for the different chemical and physical processes in the body.

Cellular respiration

Which is not a function of cellular respiration?

Converts sunlight to starch

is a dome-shaped muscle at the bottom of the lungs that expands or contracts when breathing.

Diaphragm

is a flap of cartilage that opens when breathing and closes when swallowing.

Epiglottis

The epiglottis is a cartilage that covers the larynx when swallowing food. What would happen if the food enters the larynx?

Food will block the airways

The respiratory tract tubules tend to decrease in diameter as they approach the lungs. What could be the reason behind this?

It allows the respiratory tribes to penetrate portion of the lungs.

The alveolus is a sac-like structure that expands when air enters the lungs. What is the reason for this expansion?

It increases surface area for faster rate of gas exchange.

also known as the voice box, is involved in sound production.

Larynx

are the main organ for respiration where oxygen is taken into and carbon dioxide is expelled out.

Lungs

The respiratory tract is often covered with specialized cells that secrete mucus. What could be the best explanation for the secretion of this mucus?

Mucus traps foreign particles in the air and prevents infection.

serve as the opening to the respiratory tract.

Nostrils

connects mouth and nasal cavity to the esophagus.

Pharynx

The diaphragm is a thin sheet of muscle that actively contracts and relaxes to allow air movement in the lungs. What could be the effect when this muscle collapses?

The lungs will not be properly filled with air

air from the atmosphere is transported into the lungs. At the same time, carbon dioxide from the different parts of the body is also carried to the lungs and then released to the environment.

breathing

Respiration is divided into two stages

breathing and cellular respiration.

The upper respiratory tract consists of?

nostrils, pharynx, epiglottis, and larynx

Which of the following explains the movement of oxygen during gas exchange between the alveoli and the capillaries?

oxygen moves from the alveoli to the blood in the capillaries.

The process involved in the exchange of oxygen and carbon dioxide between an organism and its environment is called

respiration

is a tube that connects the larynx and pharynx to the lungs

trachea

The lower respiratory tract includes?

trachea, bronchi, lungs, alveoli, and diaphragm