Control of respiration

Question 1

The control of respiration

Answer 1

• Voluntary control of respiration is exerted during activities such
  as speaking and singing but is overridden if blood carbon dioxide
  rises
• Chemoreceptors

Question 2

chemoreceptors

Answer 2

are receptors that respond to changes in the
partial pressures of oxygen and carbon dioxide in the blood and
cerebrospinal fluid

Question 3

hypoxaemia

Answer 3

A small reduction in partial pressure of oxygen

Question 3

hypercapnia

Answer 3

Arterial partial pressure rise of carbon dioxide.

Question 3

what happens when hypercapnia occurs

Answer 3

the central chemoreceptors respond by
stimulating the respiratory centre thereby increasing ventilation
of the lungs and reducing arterial partial pressure of carbon
dioxide

Question 3

what happens when hypoxaemia occurs

Answer 3

produces the same effect as in hypercapnia

Question 3

what forms the respiratory centre

Answer 3

is formed by groups of nerves in the
medulla (the respiratory rhythmicity centre) which control the
respiratory pattern, i.e. the rate and depth of breathing.

Question 4

the respiratory rhythmicity centre

Answer 4

groups of nerves in the
medulla