An elderly person decides to get a tattoo. The tattoo artist will have to set the needle depth to a deeper setting because the epidermis of the elderly is thicker and tougher than in younger skin.
Answer the following statement true (T) or false (F)
False
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Isotopes differ from each other only in the number of electrons the atom contains
Indicate whether the statement is true or false
The blood cells with the longest circulating life span are the:
a. red blood cells b. granular white blood cells c. nongranular white blood cells d. both B and C have equal life spans
All of the following are true about the cabbage water tests, except
A. baking soda is used in this experiment as an example of a basic substance. B. distilled water is used in this experiment as an example of a neutral substance. C. vinegar is added to one of the test tubes as an example of an acidic substance. D. red cabbage contains a pigment that functions as a colorimetric pH indicator. E. All of the choices are correct.
During a muscle action potential, calcium is released into the sarcoplasm, near the actin and myosin molecules. Which of the following is the best explanation of what the calcium does?
A) The calcium binds to the actin and myosin and makes them work together. B) The calcium breaks apart ATP to ADP and P. C) The calcium removes the tropomyosin block. D) The calcium causes the release of acetylcholine.