The normal pH of blood is 7.35-7.45
Indicate whether the statement is true or false
TRUE
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A chemical secreted from astrocytes that can trigger synapse formation is
a. protein tau b. nitric oxide c. thrombospondin d. dopamine e. NMDA
The major means of decreasing heat loss in response to a cold environmental temperature is
a. skin vasoconstriction b. skin vasodilation c. increasing the temperature gradient between the skin and environment d. formation of "goose bumps" e. both a and d
Answer the following statement(s) true (T) or false (F)
1. Several muscles of facial expression are stimulated by the facial nerve. In other words, these muscles are innervated by the facial nerve. 2. Most athletic injuries can be prevented by conditioning, stretching, and warm-up exercise. 3. Injury to the deep fibular nerve would cause inability to extend one's toes. 4. As axon diameter increases, the conduction speed of an action potential decreases. 5. The nervous system employs exclusively electrical means to send messages, whereas the endocrine system communicates by means of chemical messengers.
In the astigmatism test, astigmatism is present if some groups of radiating lines on the astigmatism chart appear red, while others appear black.
Answer the following statement true (T) or false (F)