Respiratory regulation

Question 1

Respiratory control centre

Answer 1

• regulates breathing, found in the medulla oblongata.

Question 2

Inspiratory control centre

Answer 2

• stimulates muscles to contract at rest and during exercise.

Question 3

Expiratory control centre

Answer 3

• inactive at rest, stimulates additional muscles to contract during exercise.

Question 4

Respiratory regulation (at rest)

Answer 4

• nerve impulses are generated and stimulate the inspiratory muscles causing them to contract via the:
  Intercostal nerve to the external intercostals
  Phrenic nerve to the diaphragm

Question 5

Respiratory regulation (during exercise)

Answer 5

• breathing rate and depth must increase to meet the rising demands for oxygen supply and CO2 removal.
• sensory nerves relay information to the RCC where a response in initiated by the IC and EC.

Question 6

Chemoreceptors (neural)

Answer 6

• located in the aorta
• detect changes in blood acidity increases and decreases in CO2 and O2 levels.

Question 7

Proprioceptors (neural)

Answer 7

• located in muscle tendons and joints
• detect changes in activity in the muscles and joints.

Question 8

Baroreceptors (neural)

Answer 8

• located in lung tissue and bronchioles.
• detect changes in lung inflation and pressure.

Question 9

Thermoreceptors

Answer 9

• located in blood vessels.
• detect and increase in blood temperature.