The primary determinant of blood flow to a particular region of the body during normal physiological function is

A. the radius of arterioles.
B. blood hematocrit.
C. the length of arterioles.
D. venous return regulated by sympathetic activation.
E. leakage of fluids from the capillaries.


A. the radius of arterioles.

Biology & Microbiology

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Cardiac muscle fibers are electrically coupled by junctions called intercalated discs

____________________ Indicate whether the statement is true or false.

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One of the complications of Alzheimer's disease is an interference with learning and memory. This disease would most likely involve _____

A) changes in the concentration of ions in the extracellular fluid surrounding neurons B) changes in myelination of axons C) molecular and structural changes at synapses D) structural changes to ion channels in axons

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In an organism's genome, autosomes are __________.

a. the chromosomes that differ between sexes b. chromosomes that are involved in sex determination c. only inherited from the mother (maternal inheritance) d. all of the chromosomes other than sex chromosomes

Biology & Microbiology