(4) .
List the chemoreceptors concerned with regulation of respiration.
Indicate their locations and the stimuli to which each of them respond.
(5).
A man resident at sea level travelled to a mountainous area (barometric pressure 600 mmHg) for the weekend.
His respiratory rate increased to 28 cycles per minute.
His arterial PCO2 was reduced and arterial pH increased.
Explain these observations.
(6) .Explain the physiological basis of the following.
The vital capacity of a person is higher in the upright posture than in the supine.
In the supine posture, a higher value for vital capacity is obtained if Valsalva maneuver is performed just before its measurement.
(7). Explain the below statements.
- Hyperventilation may produce tetany.
- This condition may be improved by breathing in and out of a paper bag.