Respiratory System

Question 1

What is the relation between CVS and respiratory system ?

Answer 1

Cardiorespiratory system provides organs and tissues with an supply of O2 .

Both systems regulated by nervous input in response to changes in O2 demand

Question 2

How do respiratory organs increase the rate of gaseous exchange?

Answer 2

Large surface area
Thin diffusion barrier
High blood supply

Question 3

The structure of the lungs ?

Answer 3

Surrounded by pleural membranes

Question 4

The function of the lungs ?

Answer 4

Contraction of large muscular diaphragm

ribcage induces inhalation

Question 5

Where does gas exchange occur ?

Answer 5

Gaseous exchange between air and blood occurs at the alveoli

Question 6

How does gaseous exchange occur ?

Answer 6

1) Diffusion of O2 from alveolus to blood capillary.

2) CO2 from blood diffuses into capillary to be exhaled.

3)Ventilation and blood flow maintain concentration gradients to maximise diffusion

Question 7

how are lung volumes are determined ?

Answer 7

spirometry trace

Question 8

Different types of lung volume ?

Answer 8

Vital capacity
Residual volume

Question 9

What are the 3 types of chemoreceptor ?

Answer 9

central receptors
carotid bodies
aortic bodies