G cells of the stomach secrete
A) pepsin.
B) secretin.
C) enterokinase.
D) gastrin.
E) cholecystokinin.
D) gastrin.
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Compared to skeletal muscle, smooth muscle
A. contracts more rapidly and relaxes more slowly. B. contracts more slowly and relaxes more rapidly. C. contracts more rapidly and relaxes more rapidly. D. contracts more slowly and relaxes more slowly.
The ________________________________________ system is responsible for the intake and breakdown of food and water, the absorption of nutrients, and the elimination of solid waste products
Fill in the blank(s) with correct word
Functionally, how is cardiac muscle tissue controlled, compared to that of skeletal muscle tissue?
A. Both cardiac and skeletal muscle tissue are controlled by pacemaker cells within the respective tissues. B. Cardiac muscle tissue is controlled by pacemaker cells within the heart, while skeletal muscle tissue is regulated by somatic motor neurons. C. Both cardiac and skeletal muscle tissue are controlled by somatic motor neurons. D. Cardiac muscle tissue is controlled by somatic motor neurons, while skeletal muscle tissue is controlled by pacemaker cells within the tissue. E. Cardiac and skeletal muscle tissue are controlled by both somatic motor neurons and by pacemaker cells within the respective tissues.
Which number indicates a dermal papilla?
A. 1 B. 2 C. 3 D. 4 E. 5