Respiratory System

Question 1

Respiratory Rate?

Answer 1

16-20 resps

Question 2

Factors influencing resp rate?

Answer 2

Increase carbon dioxide
Decrease oxygen
Vital capacity
Blood pressure

Alcohol
Exercise
Stress
Drugs

Question 3

Inhalation?

Answer 3

Intercostal muscles contract, rib cage moves upwards and outward, diaphragm contracts and flattens so lung volume increases

Question 4

Exhalation?

Answer 4

Intercostal muscles relax, rib cage moves down and inward, diaphragm relaxes and moves up so lung volume decreases

Question 5

Gaseous exchange?

Answer 5

Oxygen diffuses into blood from alveoli and carbon dioxide diffuses from blood into alveoli.

Question 6

Transport of o2 and Co2

Answer 6

Red blood cells transport o2 around the body

Plasma transports co2 around body

Question 7

Structures between the lungs?

Answer 7

Heart
Vena cava
Aorta 
Trachea
Oesophagus

Question 8

Lung layers?

Answer 8

Parietal later is the outer layer of membrane
Visceral layer forms inner layer of membrane
Pleural cavity is hollow space for lungs lubricated by plural fluid

Question 9

Nervous controls of breathing?

Answer 9

Chemical- Chemorecpetors in wall of aorta and caratoid arteries detect change in blood e.g increase of co2 means increased breathing rate.

Control centre in hind of the brain: medulla oblongata and the pons regulates breathing