The term "metabolism" refers to
A. reactions involving the breakdown of complex molecules into simpler ones.
B. reactions involving the breakdown of complex molecules or the exchange of atoms between similarly sized reactants.
C. all the chemical reactions in the body.
D. reactions involving the synthesis of complex molecules from simpler ones.
E. digestive system reactions that are either catabolic or exchange reactions.
C
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Answer the following statements true (T) or false (F)
1. The iris is actually an involuntary muscle in the choroid layer. 2. In very dim light the circular fibers of the iris contract, causing the pupil to dilate. 3. Presbyopia is a term for the nearsightedness of old age. 4. Cataracts may be caused by exposure to the ultraviolet radiation of the sun. 5. A cataract is a condition in which the cornea becomes less transparent and “milky” in appearance.
Why do schools require inoculations for childhood diseases such as mumps, measles, and whooping cough? Why are the inoculations of value?
What will be an ideal response
The most moveable fibrous joints are the __________.
a) gomphoses b) syndesmoses c) symphyses d) sutures
Describe the structure and function of the esophageal sphincters. What occurs if the lower sphincter fails?
What will be an ideal response?