Vasoconstriction:
A. decreases peripheral resistance
B. increases arterial blood pressure
C. is caused by relaxation of smooth muscle in the blood vessel walls
D. decreases cardiac output
Answer: B. increases arterial blood pressure
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Indicate whether the statement is true or false
Which of the following is incorrect pertaining to the inguinal canal?
A) It transmits an indirect inguinal hernia. B) It is traversed prenatally by the processes vaginalis, which later occludes. C) It is traversed prenatally by the primordial testis. D) Its roof is formed by the inguinal ligament. E) Its superficial opening is the superficial (external) inguinal ring.
What role do the tonsils play in the respiratory system?
A) Tonsils produce mucus which drains into the nasal cavities. B) Tonsils humidify and warm incoming air. C) Tonsils moisten the air entering the respiratory passageways. D) Tonsils protect the body from infection. E) Tonsils sweep contaminated mucus toward the throat.
Vasodilation in skeletal and cardiac muscle tissue results from the signal molecule _____ binding to ______ receptors
A. Epinephrine; beta 2 B. Epinephrine; alpha C. Acetylcholine; beta 2 D. Acetylcholine; alpha