Which of the following best describes the composition of the middle layer of an arterial wall?
A. smooth muscle
B. stratified squamous epithelium
C. skeletal muscle
D. dense fibrous connective tissue
Answer : A. smooth muscle
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The ?-jelly roll of the Lpt system functions to
A. help translocate assembled LPS across the outer membrane of the bacterial cell. B. help attach the O-antigen to core oligosaccharide moieties during synthesis of LPS. C. help anchor the newly positioned LPS on the bacterial cell surface. D. help hide lipid A from the hydrophilic periplasm during LPS transport to the membrane.
Spongy bone is indicated by the letter ____
a. A b. B c. C d. D e. E
An example of a generally inhibitory neurotransmitter is
A) acetylcholine. B) glutamate. C) dopamine. D) GABA. E) serotonin.
With __________ speciation, populations in physical contact speciate.
Fill in the blank(s) with the appropriate word(s).