Which neurotransmitter excites skeletal muscle and inhibits cardiac muscle?
A. Norepinephrine
B. Histamine
C. Dopamine
D. Acetylcholine
E. ?-endorphin
Answer: D
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Since they both connect to bone on one end, how do wrist ligaments differ from wrist tendons?
A) Wrist tendons are connected on the other end to joints. B) Wrist tendons are connected on the other end to muscle. C) Wrist ligaments are connected on the other end to muscle. D) Wrist ligaments are connected on the other end to joints.
Cats go through an estrus cycle every _____ days
a. 5-7 c. 15-21 b. 10-14 d. 15-16
The triceps brachii helps the pectoralis major flex the arm. In this example, the triceps is which of the following?
A. An agonist B. A synergist C. A fixator D. An antagonist
Which of the following is not one of the main divisions of the adult brain?
A) cerebrum B) diencephalon C) prosencephalon D) midbrain E) pons