What best characterizes the function of the parasympathetic nervous system?
A) The parasympathetic nervous system prepares the body for emergency situations.
B) The parasympathetic nervous system prepares the body for physical activity.
C) The parasympathetic nervous system maintains homeostasis when the body is at rest.
D) The parasympathetic nervous system is the "fight or flight" system.
Answer: C
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The __________ body is a jelly-like substance that fills the space posterior to the lens and helps to maintain the shape of the eyeball.
Fill in the blank(s) with the appropriate word(s).
Using the appropriate equations, predict the effects in each scenario.
A. Vessels X and Y have the same diameter. X is 5 cm long and Y is 10 cm long. Which has the faster velocity of flow for the same fluid? B. A blood vessel has a radius of 4 cm. Vasoconstriction reduces the radius to 1 cm. In order to maintain the same flow, by what factor must pressure increase? C. The blood vessel in B above dilates from 1 cm to 4 cm. Does the flow rate increase or decrease? D. A new subdivision is built between your house and the water storage tower. If the water company makes no adjustments, will the water pressure at your house change? If so, in which direction? Why?
What serves as the link between the hydrophilic hormone serving as the first messenger and the second messenger?
A.)protein kinase B.) G-protein C.)adenylate cyclase D.)cAMP
What is the function of an adhesion junction?
A. To keep cells from pulling apart B. To create an impermeable barrier between cells C. To allow materials to pass from cell to cell D. None apply.