Which type of chemical reaction breaks larger reactants into smaller products?
a) synthesis
b) decomposition
c) potential
d) exchange
e) activated
Answer: b
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Air flows out of the body during expiration because
A. intrapulmonary pressure is greater than atmospheric pressure. B. intrapleural pressure is greater than intrapulmonary pressure. C. atmospheric pressure is greater than intrapulmonary pressure. D. intrapleural pressure is greater than atmospheric pressure.
____________________ forms flexible but non-elastic fibers or sheets that provide tensile strength
Fill in the blank(s) with correct word
Acetylcholine exerts its effect by
A. binding to receptors at the motor end plate. B. activating acetylcholinesterase. C. allowing calcium to enter the cell. D. stimulating the motor neuron's synaptic knob.
Which of the following is not a characteristic of venous valves?
A) preventing backflow of blood B) channeling blood away from the heart C) channeling blood toward the heart D) permit blood flow in one direction only E) all of the above