A group of nurses are discussing the benefits of the blood-brain ...

[moongchi]

A group of nurses are discussing the benefits of the blood-brain barrier, which statement made by one of the nurses regarding the blood-brain barrier demonstrates a need for further teaching?
 
  a. It can protect the brain from injury by potentially toxic substances.
  b. It can be a significant obstacle to entry of therapeutic agents.
  c. It is not fully developed at birth.
  d. Infants are not as sensitive to central nervous system drugs as older children and adults.

Question 2

A nurse assesses a patient with severe venous incompetence. When the patient stands, blood pressure decreases. Which compensatory change should the nurse expect?
 
  a. Tachycardia
  b. Increase in cardiac output
  c. Bradycardia
  d. Pulmonary edema

[ms_sulzle]

Answer to Question 1

D
Infants are much more sensitive to central nervous system drugs than older children and adults, as the blood-brain barrier is not fully developed at birth.
From a therapeutic perspective, the blood-brain barrier is a mixed blessing. On the positive side, it protects the brain from injury by potentially toxic substances. However, it also makes it difficult to treat diseases affecting the brain.
The blood-brain barrier is not fully developed at birth; no further teaching is required.

Answer to Question 2

A
Postural hypotension is caused by the pooling of blood in the veins, which reduces venous return, resulting in venous dilation and tachycardia as compensatory mechanisms.
An increase in cardiac output would not occur.
The heart rate would actually increase, not decrease.
Pulmonary edema would not occur.

[moongchi]

Thank you!

[ms_sulzle]

Always glad to help...