Excitatory postsynaptic potentials are generally caused by _______channels opening, while inhibitory postsynaptic potentials may be caused by _______ channels opening.
a. Na+; Cl–
b. K+; Cl–
c. Ca2+; K+
d. Cl–; K+
Answer: a. Na+; Cl–
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membrane, no blood supply, and is one layer thick. This tissue type is
a. stratified epithelium. b. simple epithelium. c. connective. d. muscle. e. nervous
The role of CAP in the lac operon is:
a. repression of RNA polymerase binding to the promoter. b. negative control of the lac operon. c. enhancement of RNA polymerase binding to the promoter. d. to inactivate the repressor by binding to its allosteric site. e. the activation of allolactose binding to the repressor protein
Botulism is often referred to as lockjaw.
Answer the following statement true (T) or false (F)
A large group (cluster) of similar bacteria:
A. Capsule B. Strep C. Diplo D. Staph