Dual innervation of organs with nerve fibers whose actions oppose each other enables precise control over an organ's activity, like having both an accelerator and a brake to control the speed of a car
a. True
b. False
Indicate whether the statement is true or false
True
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Most of the iron that is removed from degraded hemoglobin is
A) excreted by the kidneys. B) excreted by the liver. C) excreted by the intestines. D) recycled to the red bone marrow. E) stored in yellow bone marrow.
In the process known as Wallerian degeneration,
A) macrophages remove the debris of damaged axons. B) Schwann cells completely degenerate. C) the axon proximal to the injury degenerates. D) no trace is left of the path taken by a previous axon. E) All of the answers are correct.
The largest part of the brain, the ________________________________________ is responsible for receiving and processing stimuli, initiating voluntary movement, and storing information
Fill in the blank(s) with correct word
In a process called autoregulation, ________ in response to a decline in dissolved oxygen levels within a tissue
A) blood flow to the area decreases B) the precapillary sphincters relax C) vasomotion is not a factor D) the diameter of the supplying capillaries' entrance narrows E) the volume of blood arriving at the venules decreases