Immunoglobulin ____, found in tissue fluids and plasma, attacks viruses, bacteria, and toxins
a. A
b. D
c. G
d. E
c
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What is the correct order of events in the sliding filament theory of muscle contraction?1. Myosin head binds to actin2. Calcium ions bind to troponin3. Myosin cross-bridges bend, pulling actin toward center of sarcomere4. ATP is split into ADP and P5. Tropomyosin moves to expose active sites of actin6. Sarcoplasmic reticulum releases calcium ions7. ADP and P released from myosin
A. 1,2,3,4,5,6,7 B. 6,2,5,4,1,7,3 C. 2,4,6,1,3,5,7 D. 4,2,7,1,6,5,3
Using Figure 21.2, match the following:
1) Tidal volume.
2) Inspiratory reserve volume.
3) Residual volume.
4) Expiratory reserve volume.
5) Air that does not participate in the exchange of gases.
The _______________ is the lung volume change between maximal inspiration and maximal forced expiration.
A. tidal volume B. forced expiratory vital capacity C. inspiratory reserve volume D. residual volume E. expiratory reserve volume
Which of the following effects on the body CANNOT be attributed to testosterone?
A. Rapid bone growth B. Increased calcium excretion C. Growth of pubic, axillary, and facial hair D. Hypertrophy of the larynx E. Enlargement of male genitalia