How much of the total volume of body fluid is intracellular fluid?
a) 10%
b) 50%
c) 1/3
d) 2/3
e) 99%
d
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Dehydration can be caused by endocrine disturbances such as diabetes mellitus or diabetes insipidus
Indicate whether the statement is true or false
The normal pacemaker of the heart is the
a. SA node. b. AV node. c. bundle of His. d. Purkinje system. e. ventricular myocardium.
While sitting at your desk, you drop your pencil onto the floor. You bend over to pick up the pencil. In order to straighten up and continue your exam, you must use which of the following muscles?
A. Tibialis anterior B. Erector spinae C. Semimembranosus D. Tibialis anterior and semimembranosus E. Extensor hallucis longus
Answer the following statements true (T) or false (F)
1. The epiglottis is a smooth muscle that covers the glottis during swallowing. 2. Valsalva's maneuver involves closing off the glottis (preventing expiration) while contracting the muscles of expiration, causing an increase in intra-abdominal pressure. 3. Smoking diminishes ciliary action and eventually destroys the cilia. 4. Tracheal obstruction is life threatening. 5. The parietal pleura lines the thoracic wall.