Which statement best describes the action of norepinephrine?
1. An enzymatic substance released at receptors at the end of postganglionic nerves
2. The neurotransmitter that binds to adrenergic receptors to produce a physiologic response
3. The activation of beta receptors to constrict coronary blood vessels
4. The stimulation of alpha receptors to decrease blood pressure
Correct Answer: 2
Rationale 1: Norepinephrine is not an enzyme.
Rationale 2: This best describes the action of norepinephrine. Norepinephrine binds to adrenergic receptors to produce a physiologic response.
Rationale 3: Activation of beta receptors causes dilation of coronary blood vessels.
Rationale 4: Norepinephrine acts on alpha and beta receptors, and its stimulation causes an increase in blood pressure by binding with alpha-2 receptors.
Global Rationale: The neurotransmitter that binds to adrenergic receptors to produce a physiologic response is the best statement that describes the action of norepinephrine. Norepinephrine is not an enzyme. Activation of beta receptors causes dilation of coronary blood vessels. Norepinephrine acts on alpha and beta receptors, and its stimulation causes an increase in blood pressure by binding with alpha-2 receptors.
You might also like to view...
A nurse in the ICU not only is excellent in providing care for her patients but has also earned the credential of CCRN and is tireless in lobbying for federal legislation that protects patients' rights
She is also the first nurse in the ICU to recognize problems with process and to develop solutions. However, this nurse's husband has begun to complain that he never sees her, and she feels like she has lost touch with her teenage daughter. Which professional practice attribute or attributes does this nurse demonstrate? Select all that apply. A) Passion B) Mastery C) Balance D) Action
During the preoperative interview, the client's statement that would alert the nurse to an increased risk during surgery is "I
a. am a reformed smoker; I haven't had a cigarette in 10 years." b. rarely eat red meat; it usually makes me feel bloated." c. take a couple of aspirin every day for my headaches." d. take a large assortment of vitamins daily."
An older adult client shares with the nurse that, "I don't know what it is but it seems that I need more light for reading or even watching television as I get older." The nurse explains that aging may cause this change due to the:
a. Slower ability of the pupil to adjust to changes in lighting. b. Impact arcus senilis has on visual acuity c. Flattening and thinning of the cornea. d. Retinal changes that begin to occur with aging.
Assertiveness is more complicated than it seems because of the personal work required on the part of individuals and the need for psychologically safe environments
Indicate whether this statement is true or false.