At rest, the tropomyosin molecule is held in place by
A) actin molecules.
B) myosin molecules.
C) troponin molecules.
D) ATP molecules.
E) calcium ions.
Answer: C
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The head of the humerus fits into the ________ of the scapula
A) acromion process B) glenoid cavity C) suprascapula notch D) coracoid process
If a decline in blood pressure or oxygen concentrations occurs, the cardiac centers then call for a(n)
A) decrease in cardiac output. B) decrease in sympathetic motor neuron activity. C) decrease in stroke volume. D) increase in parasympathetic motor neuron activity. E) increase in cardiac output.
Immature bone cells that produce the organic bone matrix are called ______.
a. osteocytes b. osteoclasts c. chondrocytes d. osteoblasts
The urethra is ________ in the male than in the female.
Fill in the blank(s) with the appropriate word(s).