Reactive oxygen species include all of the following except
a. hydroxyl radical
b. oxygen molecules
c. superoxide anion
d. peroxide radic
Ans: b. oxygen molecules
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A unique feature of the diaphragm is that it is_____
a. the only smooth muscle in the human body b. the only smooth muscle that can be voluntarily controlled c. only found in humans d. the only skeletal muscle that is under involuntary control e. easily replaceable
Which one of the following is characteristic of an isotonic muscle contraction but not an isometric muscle contraction?
A) generates a force B) moves an object or part of the skeleton C) helps an individual maintain an upright position D) requires energy E) helps an individual maintain posture
Organisms that can contain genes introduced from other species are referred to as
A) bacteria. B) plasmids. C) manipulated. D) genomic. E) transgenic.
Identify the labeled structures that are involved in olfaction. Briefly describe the function of each structure. 
A: ________B: ________C: ________
What will be an ideal response?