Stephanie is in a car accident, flung from her vehicle and landing on her back on pavement. At the scene, an emergency medical technician checks her Babinski reflex, in which the great toe extends upward and the smaller toes fan apart. This reflex
A. is meaningless in assessing an emergency situation.
B. is normal in adults.
C. may indicate aging of the corticospinal tract.
D. may indicate an injury to the corticospinal tract.
Answer: D
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Fill in the blank with correct word.
What's the name of the process in which the spinal interneurons inhibit the antagonist motor neurons?
A. Inhibitory Stimulus B. Reciprocal Inhibition C. Contraction D. hyperpolarization
Which of the following cells produce renin?
A. Mesangial cells B. Macula densa C. Juxtaglomerular cells D. Principal cells E. Intercalated cells
Thyroid hormone, epinephrine, and melatonin are examples of what category of hormone?
A. Amino acid derivatives B. Proteins C. Steroids D. All of these answers are correct.