Respiratory system

Question 1

inhalation definition

Answer 1

where you breathe in

Question 2

exhalation definition

Answer 2

where you breathe out

Question 3

Why does our chest get larger and smaller when breathing

Answer 3

the diaphragm contracts and relaxes, causing the chest to rise and fall.

Question 4

Role of the diaphragm

Answer 4

The diaphragm is a small muscle at the bottom of the thorax, when the diaphragm contracts the stomach flattens to draw air in. When it relaxes the stomach becomes more of a dome shape.

Question 5

What is the order in which air enters the body

Answer 5

nose/mouth, trachea, bronchi, bronchioles, alveoli

Question 6

Where does gas exchange occur

Answer 6

alveoli

Question 7

what do alveoli look like

Answer 7

little air sacs attached to the bronchiole

Question 8

what happens after oxygen reaches the alveoli

Answer 8

oxygen then diffuses into red blood cells in capillaries (blood vessels) that surround the alveoli. These red blood cells deliver the oxygen throughout your body.

Question 9

Difference between where carbon dioxide and oxygen go after reaching the alveoli

Answer 9

Within the alveoli, oxygen from the air we breathe in dissolves across the thin moist membrane to enter the capillaries.
Carbon dioxide in the bloodstream diffuses in the opposite direction, entering the alveoli to travel through the respiratory system to be exhaled.

Question 10

Chemical formula for cellular respiration

Answer 10

glucose + oxygen -

carbon dioxide + water + ATP (energy)

Question 11

What is ATP

Answer 11

Energy stored in the body

Question 12

role of the respiratory system

Answer 12

Role of the respiratory system is to provide oxygen to and to remove carbon dioxide from the body.

Question 13

Recall the levels of organisationn within multicellular organisms

Answer 13

cells - tissues - organs - systems - organisms

Question 14

composition of inhaled and exhaled air particularly the change in oxygen and carbon dioxide levels

Answer 14

when we inhale we absorb some of the oxygen from the air, when we exhale we release carbon dioxide into the air. Thus there is less oxygen and more carbon dioxide.

Question 15

nasal cavity function

Answer 15

Nasal cavity function is to remove tiny airbone particles and debris before the air reaches the lower airways.

Question 16

epiglottis function

Answer 16

epiglottis is a small flap thats function is to protect the airways (tunnel to lungs) with a small flap when eating.

Question 17

pharynx function

Answer 17

The Pharynx routes air coming in your nose and mouth down to your larynx (voice box) which moves air to the trachea and lungs.
The tracheas role is to prevent passage of foreign objects, provides and safe, sturdy passage way for air to travel and regulates the temperature and humidity of air passing into the lungs.

Question 18

bronchus function

Answer 18

Bronchus carries oxygen and carbon dioxide to and from your lungs.

Question 19

bronchioles

Answer 19

At the end of the bronchi the bronchioles carry air to the alveoli.
The alveoli expand during inhalation, taking in oxygen and shrink during exhalation, expelling carbon dioxide.

Question 20

ribs

Answer 20

Ribs are important because they convert intercostal muslce shortening into lung volume expansion.

Question 21

intercostal muscles

Answer 21

Intercostal muscles pull down on the rib cage and push air out of the lungs.

Question 22

diaphragm

Answer 22

The diaphragm contracts and flattens and the chest cavity enlarges. This contractio creates a vacuum which pulls air into the lungs.