Which of the following is not one of the three main factors influencing blood pressure?
A) cardiac output
B) peripheral resistance
C) emotional state
D) blood volume
C) emotional state
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Modified capillaries that are lined with phagocytes are called ________.
A) sinuses B) sinusoids C) thoroughfare channels D) anastomoses
More tension is developed during twitch summation than during a single twitch because the duration of elevated cytosolic Ca2+ concentration increases during summation, thus increasing the availability of cross-bridge binding sites
Indicate whether the statement is true or false
The ________ show(s) a remarkable degree of degeneration (involution) with age.
A. spleen B. lymph nodes C. appendix D. thymus E. pharyngeal tonsils
Which of the following does not bend (refract) the light rays in the eye?
A. cornea B. aqueous humor C. pupil D. lens E. vitreous humor