What is the first structure of a reflex arc?
A. Motor neuron
B. Receptor
C. Effector (muscles or glands)
D. Sensory neuron
Answer: B
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The maintenance of a blood pH of about 7.4 and correct fluid levels are part of the ________ function of blood.
Fill in the blank(s) with the appropriate word(s).
Why does there seem to be a link between smell and memory?
What will be an ideal response?
The condition where the skin and the whites of the eyes appear slightly yellow is due to high blood levels of the substance ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following does NOT affect the tension that can be developed by a muscle fiber?
a. the number of motor units recruited b. the frequency of action potentials conducted by the motor neuron c. the length of the fiber at the onset of contraction d. diameter of the muscle fiber e. All of these affect tension development by a muscle fiber.