Respiration Control

Question 1

Which spontaneously firing neurons are the
pacemakers of the respiratory rhythm?
A. pre-Bosnian complex
B. pre-Bӧtzingercomplex
C. post-pharynal complex
D. pre-Cambrian complex
E. post- laryngeal complex

Answer 1

B

Question 2

The most important chemical regulator of respiration is
A.oxygen.
B. carbon dioxide.
C. bicarbonate ion.
D. sodium ion.
E. hemoglobin.

Answer 2

B

Question 3

The Hering-Breuer reflex
A. functions to increase ventilation with changes in blood pressure.
B. alters pulmonary ventilation when the PO2 changes.
C. alters pulmonary ventilation when the PCO2 changes.
D. limiting ventilation volumes.
E. is an important aspect of normal, quiet breathing.

Answer 3

D

Question 4

Nerve impulses from __________ will results in inspiration
A. The dorsal respiratory group
B. The ventral respiratory group
C. Broca’s centre
D. The pnuemotaxic center
E. The preoptic nucleus of the hypothalamus

Answer 4

A

Question 5

Which of the following statements is correct?
A. H+ directly acts on central chemoreceptors to decrease rate and
depth of breathing
B. H+ directly acts on central chemoreceptors to increase rate and
depth of breathing
C. Low arterial pH is the most powerful stimulator of respiration
D. Arterial pH does not affect central chemoreceptors directly
E. Arterial pH affects peripheral chemoreceptors directly

Answer 5

B