Epinephrine blocks the contraction of muscles in the airways. Which of the other activities of epinephrine is most likely to be regulated by the same type of pathway?
A. promotes the breakdown of glycogen in skeletal muscle cells
B. stimulation of heart muscle cell contraction
C. increased sweating
D. inhibition of saliva production in salivary glands
E. contraction of smooth muscle cells in blood vessels
Answer: D
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Contrast typical embryonic development in protostomes and deuterostomes
What will be an ideal response?
When a cell undergoes mitosis,
a. the daughter cells have identical genes. b. the daughter cell has genes identical to those of the mother cell that produced it. c. the amount of cytoplasm in the mother cell and in each of the daughter cells is equal. d. there is an exact duplication and division of all of the organelles between daughter cells. e. the daughter cells have identical genes, and the daughter cell has genes identical to those of the mother cell that produced it
Infections, stress or factors that speed up peristalsis may cause
a. diarrhea. b. constipation. c. impaction. d. Crohn's disease. e. Salmonellosis.
Building roads, parking lots, buildings and bridges all contribute to:
a. biotic pollution. b. commercial harvest. c. habitat destruction. d. ex situ conservation. e. restoration ecology.