33.3(respiratory System)

Question 1

Respiration

Answer 1

Process of gas exchange between a body and the environment. Release of carbon dioxide and uptake of oxygen

Question 2

How is breathing controlled

Answer 2

Nervous system controls breathing muscles. It’s initiated by breathing center in part of brain stem(medulla oblongata). Sensory neurons gather info about CO2 levels and send to breathing center

Question 3

Hemoglobin

Answer 3

A protein located in the red blood cells that carries oxygen to your body’s organs and tissues. Transports CO2 from organs and tissues back to lungs.
Carries oxygen from respiratory organs to rest of the body

Question 4

Pharynx

Answer 4

Serves as a passageway for both air and food

Question 5

Trachea

Answer 5

Windpipe transports air to the lungs

Question 6

Epiglottis

Answer 6

It is a flap that covers entrance to the trachea. It ensures that the food/liquid go into the esophagus

Question 7

Larynx

Answer 7

Two elastic folds of tissue known as vocal cords. They vibrate and produce sounds(speech)

Question 8

Bronchi

Answer 8

Two large tubes in the chest. They both transport oxygen to one lung each. Then get into smaller passageways(bronchus)

Question 9

Alveoli

Answer 9

Millions of tiny air sacs at dead ends. Receive air from bronchioles

Question 10

Diaphragm

Answer 10

Large dome-shaped muscle found at the bottom of the chest cavity. When you inhale and exhale it contracts and flattens

Question 11

How does diaphragm aid in breathing

Answer 11

It helps make the air pressure in the chest cavity greater than the atmospheric pressure

Question 12

True or False: the breathing center in the brain responds to levels of carbon dioxide in the brain, not oxygen

Answer 12

False

Question 13

What does the respiratory system consist of

Answer 13

Nose, pharynx, larynx, trachea, bronchi, lungs

Question 14

Where does gas exchange take place

Answer 14

Alveoli

Question 15

What is breathing primarily controlled by

Answer 15

Medulla oblongata.