It may take nearly a half hour for rods of the retina to regenerate a full supply of photopigment during the process of
A. dark adaptation.
B. light adaptation.
C. lateral inhibition.
D. opsinization.
A
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Codons are three contiguous mRNA bases.
Answer the following statement true (T) or false (F)
Which of the following opposes the flow of blood back to the heart?
A) vascular resistance B) peripheral veins have valves to prevent backflow of blood C) muscular pumps squeeze veins and move blood toward the heart D) blood pressure E) blood pressure gradient from arteries to veins
The process of sensation begins in a _____, which can be either a primary sensory neuron or a separate cell
a) sensory receptor cell. b) signal transducer cell. c) secondary sensory neuron. d) effector cell. e) association neuron.
Which of the following activities is a function of the plasma membrane?
A. Digestion of unneeded cell organelles B. Cell metabolism C. Detoxification D. Recognition of bacterial cells by the immune system E. Transport of products from the nucleus to the endoplasmic reticulum