Which of the following adult structures is not derived from the same primary germ layer as the others?
A. Muscles
B. Bones
C. Blood vessels
D. Nerves
Answer: D
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Cardiac muscle is able to use a variety of fuel types for cellular respiration.
Answer the following statement true (T) or false (F)
The action potentials from the sympathetic neurons ________, while the action potentials from the parasympathetic neurons ________.
A. increase heart rate and contraction strength; decrease heart rate and contraction strength B. increase heart rate and contraction strength; decrease heart rate but do not affect heart contraction strength C. decrease heart contraction and contraction strength; increase heart rate and contraction strength D. increase heart rate but do not affect heart contraction strength; decrease heart rate but do not affect heart contraction strength
Answer the following statements true (T) or false (F)
1. The tympanic membrane is considered the organ of hearing. 2. The organ of Corti is considered the organ of hearing. 3. Specialized cells on the tongue called taste buds provide the sense of taste. 4. Papillae are microscopic receptors that can be found on the taste buds. 5. Gustatory cells are responsible for the sense of taste.
Calcium is involved in all of the following important body functions EXCEPT
a) blood clotting. b) nervous system communication. c) muscle contraction. d) acting as a cofactor in some enzymatic reactions. e) being the primary cation that regulates osmotic balance in cells.