Psychoactive drugs may act by altering the concentration of neurotransmitters in the brain.

a. true
b. false


Answer: a. true

Biology & Microbiology

You might also like to view...

Most enveloped viruses use the host ________ membrane as their envelope source.

A. mitochondrial B. plasma C. nuclear D. none of these

Biology & Microbiology

Which of the following epithelial tissues secretes mucous and is dense with cilia?  

A.  cuboidal B.  squamous C.  simple D.  stratified E.  pseudostratified columnar

Biology & Microbiology

Which of the following is a nonrenewable resource?

a. copper and gold b. fresh water c. forests d. grasslands e. fish

Biology & Microbiology

Chlorosis is a plant condition referring to the:

A. localized death of tissues B. yellowing of leaves C. stunted growth of stems and leaves D. development of tumors E. healing of wounds

Biology & Microbiology