A patient is diagnosed with a disorder in which deoxygenated ...

[SAVANNAHHOOPER23]

A patient is diagnosed with a disorder in which deoxygenated blood is having difficulty returning to the heart and lungs for reoxygenation. In which part of the peripheral vascular system is the origin of this patient's disorder?
 
  1. arteries
  2. arterioles
  3. capillaries
  4. venules

Question 2

A patient with some blood loss is maintaining a blood pressure of 100/60 mmHg. The nurse interprets this to mean that the patient's blood pressure is being maintained through the help of which structure?
 
  1. arterioles
  2. venules
  3. capillaries
  4. veins

[angrybirds13579]

Answer to Question 1

Correct Answer: 4
In the capillary beds, oxygen and nutrients are exchanged for metabolic wastes, and deoxygenated blood begins its journey back to the heart through venules, the smallest vessels of the venous network. The venous network is where the problem with blood returning to the heart resides. Arteries and arterioles are vessels within the arterial network, not the venous network.

Answer to Question 2

Correct Answer: 1
The smaller arterioles are less elastic than arteries but contain more smooth muscle, which promotes their constriction (narrowing) and dilation (widening). In fact, arterioles exert the major control over arterial blood pressure. With blood loss, the arterioles would constrict as a compensation mechanism to increase blood pressure. This would not happen at the capillary level and is possible in the arterial system, not the venous system.