Which of the following best explains how the phenomenon of "tolerance" develops with use of psychoactive drugs over time?
A. Psychoactive drugs can up-regulate receptors for endogenous neurotransmitters.
B. Psychoactive drugs can inhibit production of endogenous neurotransmitters.
C. Psychoactive drugs often produce euphoria.
D. Psychoactive drugs can alter blood flow to the brain.
E. Psychoactive drugs can cross the blood-brain barrier.
Answer: B
You might also like to view...
Metacarpal V is located at the base of the thumb.
Answer the following statement true (T) or false (F)
Many lipid-soluble medications can be delivered by diffusion across the skin. This process is called transdermal administration and is commonly done by applying patches that contain the medication to the surface of the skin. These patches can be attached anywhere on the skin except the palms of the hands and the soles of the feet. Why?
Hemostasis is the production of formed elements of blood.
Answer the following statement true (T) or false (F)
The condition where fluid compresses the heart and limits its ability to contract is called ________
A) cardiac tamponade B) myocardial infarction C) pericarditis D) angina pectoris