Which statement is true?
A) The sympathetic division increases heart contractions but decreases gastrointestinal tract activity.
B) The sympathetic division increases heart and gastrointestinal tract muscle contractions.
C) The sympathetic division decreases all visceral organ activity.
D) The sympathetic division increases all visceral organ activity.
Answer: A
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The pronator teres and pronator quadratus cause pronation of the forearm. What muscle opposes this movement?
A. Pectoralis major B. Subscapularis C. Supinator D. Biceps brachii E. Triceps brachii
Which of the following is not an accessory structure of the integumentary system?
a. Hair b. Skin c. Nails d. All of the above are appendages
During rapid depolarization of a ventricular contractile cell, the voltage-gated sodium channels close when the membrane potential reaches approximately
A) -90 mV. B) -30 mV. C) 0 mV. D) +30 mV. E) +90 mV.
Identify the highlighted region of the small intestine.
