Tachycardia is an early sign of low cardiac output that occurs because of
A) tissue hypoxia.
B) anxiety.
C) baroreceptor activity.
D) acidosis.

Question

Quizplus · Accepted Answer

A number of compensatory responses are set in motion to restore tissue perfusion and oxygenation in the early stage of shock.Baroreceptors located in the aorta and carotid arteries quickly sense the decrease in pressure and transmit signals to the vasomotor center in the brainstem medulla.The sympathetic nervous system stimulates b₁ receptors,which respond by increasing the heart rate in an attempt to increase cardiac output.Tachycardia is not caused initially by tissue hypoxia.An early sign of low cardiac output is not anxiety.Tachycardia does not occur because of acidosis.

Tachycardia Is an Early Sign of Low Cardiac Output That