A nurse is administering an agonist drug that acts on postganglionic neurons of the sympathetic nervous system. Which response will the nurse expect to see?
a. Decreased sweating
b. Bronchodilation
c. Increased cardiac output
d. Pinpoint pupils
C
Norepinephrine (NE) is the most common neurotransmitter released by all postganglionic neurons of the sympathetic nervous system except those going to sweat glands where ACh is the neurotransmitter. NE acts on alpha1, alpha2, and beta1 receptors to increase the force and rate of cardiac contraction, thus increasing cardiac output. ACh would increase sweating. Bronchodila-tion occurs when epinephrine activates beta2 receptors on bronchial smooth muscle. NE affects alpha1 receptors to dilate the pupils.
You might also like to view...
After teaching a group of students about the various settings for community health nursing, the instructor determines that this teaching was successful when the students identify which of the following as an example of an ambulatory service setting?
A) Preschool B) Halfway house C) Continuing care center D) Family planning clinic
When a nurse asks a client to focus on an object in the distance and then move her gaze to a nearby object, what process is the nurse assessing?
a. accommodation c. pupil shape test b. direct light reflex d. pupil size test
The nurse is examining a 2-year-old child who was adopted from Guatemala. Which of the following would be a priority screening for this child?
A) Screening for congenital defects B) Screening for abuse C) Screening for childhood illnesses D) Screening for infectious diseases
A nurse is evaluating teaching when discussing care of a new tracheostomy. Which statement, made by the client, indicates that the client does not accept the new tracheostomy?
A) "I must carry tissues with me." B) "I must give up my love of pool aerobics." C) "I will not be able to have the tracheostomy removed." D) "Tell my wife about it, I do not want to touch it."