One advantage of a four-chambered heart is that it ____
a. prevents mixing of oxygenated and deoxygenated blood
b. prevents deoxygenated blood from entering the heart
c. allows for better flow of blood to the tissues
d. prevents mixing of oxygenated and deoxygenated blood and allows tissues to be bypassed
e. prevents mixing of oxygenated and deoxygenated blood and allows better flow of blood to the tissues
e
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The process of ____ is the exchange of gases between a respiratory surface and the circulatory system
a. ventilation b. cellular respiration c. perfusion d. bulk flow e. physiological respiration
What happens first following a neuronal stimulation?
a. Sodium ions enter the cell. b. Sodium ions leave the cell. c. Potassium ions enter the cell. d. Potassium ions leave the cell. e. Potassium ions are involved in positive feedback.
Urine passes out of a kidney and through a _____ on it's way to the urinary bladder
Fill in the blank(s) with correct word
The clearing made by bacteriophages in a "lawn" of bacteria on an agar plate is called a ________
A) plaque B) phage zone C) lysogenic zone D) host range E) prophage