The biceps brachii causes flexion of the elbow. The triceps brachii causes extension of the elbow, so it is a(n) ________.
A. agonist
B. abductor
C. levator
D. antagonist
Answer: D
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Cytokinesis is the division of the nucleus during mitosis
Indicate whether the statement is true or false
Amniotic fluid:
a. is similar in composition to ECF b. is found in the placenta c. is made by the chorion d. is found outside the chorion e. none of the above
Muscles that move the thumb will be named using the term:
A) superficialis. B) carpi. C) digiti. D) pollicis.
Which of the following statements regarding contraction in skeletal and smooth muscle is TRUE?
A. In skeletal muscle, calcium initiates contraction by binding to troponin, while in smooth muscle calcium initiates contraction by binding directly to myosin. B. In skeletal muscle, calcium ions bind to a regulatory protein on thin filaments; in smooth muscle, calcium ions bind to a regulatory protein on thick filaments. C. In skeletal muscle, calcium initiates contraction by binding to myosin light-chain kinase, while in smooth muscle calcium initiates contraction by binding directly to tropomyosin. D. In skeletal muscle, calcium initiates contraction by binding to troponin, while in smooth muscle calcium initiates contraction by binding to calmodulin. E. All of the choices are true.