Which of the following factors is most important in matching the blood flow through a specific tissue with the metabolic needs of that tissue?
a. sympathetically induced vasoconstriction of the arteries supplying a tissue forces more blood to flow into the tissue.
b. parasympathetically induced vasodilation of the capillaries within a tissue allows more blood to flow into the tissue.
c. local changes within a tissue resulting from increased metabolic activity can produce local arteriolar vasodilation to allow more blood to flow into the tissue.
d. widespread venous vasoconstriction allows blood to dam up at the tissue level.
e. the amount of blood flowing through each tissue remains constant through reflex controls to ensure that metabolic needs are continuously met.
C
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An injection of a local anesthetic into the spinal column is called a(n) ________
A) epidural B) subdural C) cutaneous D) epiphysis
Identify the FALSE statement.
A) The trigger zone is the integrating center of the neuron. B) IPSPs depolarize the membrane. C) EPSPs that reach threshold can initiate an action potential. D) All of the statements are true.
Which of the following is an advantage of sheep?
a. industry competition c. excellent scavengers b. low meat production d. susceptible to disease
Which of the following is NOT true of Meissner's corpuscles?
A. They are most abundant in the hypodermis. B. They are stimulated by light touch. C. They are also called tactile corpuscles. D. They are numerous in the hands, feet, joints, and external genital organs. E. All of these are true of Meissner's corpuscles.