Describe the structure of a taste bud
What will be an ideal response?
A taste bud is a cluster of cells (supporting, stem, and taste receptor cells) embedded in papillae on the tongue. A pore connects the center of the taste bud to the surface and allows chemicals to contact microvilli from the receptors.
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Cross-talk between second messenger pathways is probably involved in particular types of olfactory signal
transduction in many animals.
a. True b. False
Which of the following includes all the others?
a. actin b. myofibril c. myosin d. myofilament e. muscle fiber
As blood glucose levels fall below normal, ____
a. insulin secretion stops b. glucagon secretion increases c. the beta cells of the pancreas are stimulated d. glucose is converted to glycogen in the liver e. somatostatin levels rise
Restriction enzymes
A. cut only single-stranded DNA molecules. B. can cut randomly along a double-stranded DNA molecule. C. cut DNA molecules at specific sites. D. cut only single-stranded RNA molecules. E. function in DNA replication.