Regulation Of Breathing

Question 1

Respiratory control centre

Answer 1

Situated in the brain and controls respiration rate and depth

Question 2

Inspiration centre

Answer 2

Part of the respiratory control centre that controls inspiration

Question 3

Expiration centre

Answer 3

The part of the RCC that controls expiration

Question 4

Phrenic nerve

Answer 4

The nerve that stimulates the diaphragm to contact

Question 5

Intercostal nerve

Answer 5

The nerve that stimulates the external intercostals to contact

Question 6

Regulation of breathing sequence

Answer 6

Receptors detect changes
These inform the RCC which controls the IC and EC
The IC increases the stimulation of the phrenic and intercostal nerves so the diaphragm and intercostal contract with more force. This also stimulates the additional muscles to contract.
Volume of chest cavity increase, pressure drops, air rushes in

Question 7

External respiration At lungs

Answer 7

O2 moves from alveoli to capillaries
CO2 moves from capillaries to alveoli
Moves by diffusion (high to low)

Question 8

Internal respiration (at muscles)

Answer 8

Happens at muscles 
Between muscles and capillaries 
O2 moves from capillaries to muscles 
C02 moves from muscles to lungs 
Higher pp then diffusion