Author Question: A physician is teaching a group of medical students about the physiological basis for damage to the ... (Read 71 times)

genevieve1028 · **on:** Jun 25, 2018

A physician is teaching a group of medical students about the physiological basis for damage to the circulatory and neurological systems that can accompany hypotension.

Which of the following responses by a student would warrant correction by the physician?
A)
As vessel wall thickness increases, tension decreases.
B)
Smaller blood vessels require more pressure to overcome wall tension.
C)
The smaller the vessel radius, the greater the pressure needed to keep it open.
D)
Tension and vessel thickness increase proportionately.

Question 2

The nurse practitioner working in an overnight sleep lab is assessing and diagnosing patients with sleep apnea. During this diagnostic procedure, the nurse notes that a patient's blood pressure is 162/97.

The nurse explains this connection to the patient based on which of the following pathophysiological principles?
A)
During apneic periods, the patient experiences hypoxemia that stimulates chemoreceptors to induce vasoconstriction.
B)
When the patient starts to snore, his epiglottis is closed over the trachea.
C)
When the airway is obstructed, specialized cells located in the back of the throat send signals to the kidney to increase pulse rate.
D)
When airways are obstructed, the body will retain extracellular fluid so that this fluid can be shifted to intravascular space to increase volume.

patma1981 · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

Ans:
D

Feedback:

Tension and vessel wall thickness are inversely proportionate, in that thinner blood vessels have greater tension and vice versa. Answer choices A, B, and C all express the correct inverse relationship between tension and wall thickness.

Answer to Question 2

Ans:
A

Feedback:

People with sleep apnea also may experience an increase in BP because of the hypoxemia that occurs during the apneic periods. The specialized chemoreceptors are located in carotid bodies and aortic bodies of the aorta. Retention of fluid is not the cause of increased BP during sleep apnea episodes.