Which of the following is responsible for involuntary control of breathing?
a) cerebral cortex
b) medulla
c) hypothalamus
d) pons
Emotions acting through the …….of the brain can also affect the respiratory centre?
a) hypothalamus
b) limbic system
c) sympathetic system
d) parasympathetic
Which of the following is responsible for voluntary control of breathing?
a) cerebral cortex
b) medulla
c) hypothalamus
d) pons
A typical aqualung or SCUBA contains about 35% oxygen and 65%.........
a) helium
b) nitrogen
c) argon
d) carbon dioxide
Accumulation of H+ ions in the blood…
a) increase the pH
b) increase alkalinity
c) increase acidity
d) decrease acidity
The pH of blood is maintained at 7.4 by
a) potassium chloride
b) calcium carbonate
c) sodium carbonate
d) both a and c
