Physiological saline is 0.9 percent NaCl; red blood cells placed in such a solution will not gain or lose

water; therefore, one could state that the fluid in red blood cells is hypertonic.



Indicate whether the statement is true or false.


ANS: F, isotonic

Biology & Microbiology

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____________________ could one day be used to screen an individual's genome to reveal genetic predispositions to diseases

Fill in the blank(s) with correct word

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The human body's arterial blood pH is tightly maintained around 7.4 by buffering agents that bind hydrogen ions to stop any change in pH. If an acid-base imbalance overcomes the buffer system, the body changes the ventilation rate, or the rate at which gas enters or leaves the lungs. Changing the ventilation rate changes the concentration of CO2 in the blood, which alters the pH of the blood. In this case, pH 7.4 is the:

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The mixture of food and digestive juices that leaves the stomach is called:

A) trypsin. B) cud. C) chyme. D) pepsin.

Biology & Microbiology