When light encounters a medium of different density, it is
A) refracted.
B) diffracted.
C) reflected.
D) angled.
E) absorbed.
A
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The percentage of volume of red blood cells is called the _______________
Fill in the blank with correct word.
Short reflexes of digestion involve the glossopharyngeal and vagus nerves
Indicate whether this statement is true or false.
Lymphocytes known as ________ differentiate into plasmocytes, which secrete antibodies that attack foreign cells or proteins in distant portions of the body.
Fill in the blank(s) with the appropriate word(s).
When the bladder of an infant is filled with urine, the
a. stretch receptors in the bladder wall are inhibited. b. parasympathetic nerve supplying the bladder is inhibited, allowing the bladder to relax. c. motor neuron supplying the external urethral sphincter is stimulated, causing the sphincter to open. d. motor neuron supplying the external urethral sphincter is inhibited, allowing the sphincter to open. e. parasympathetic nerve supplying the internal urethral sphincter is stimulated, causing the sphincter to close.