A nonsteroid hormone acts on a target cell by
A) promoting phagocytosis.
B) causing synthesis of a second messenger.
C) stimulating cell division.
D) directly causing protein synthesis.
B
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Which of the following statements describes a common response of an autonomic effector during the "fight-or-flight" response?
a) Gastric motility and secretory activity increases. b) Blood vessels serving skeletal muscles constrict. c) Adipose tissues stores away triglycerides for later use. d) The pupils of the eyes dilate. e) Blood vessels serving the kidneys and digestive organs dilate.
Explain why the composition of the phospholipid bilayer determines how readily water passes through it.
What will be an ideal response?
Describe the concentration gradients associated with the resting membrane potential
What will be an ideal response?
The function of serous fluid is to reduce friction between organs.
Answer the following statement true (T) or false (F)