The root of the nail lies in a groove and is hidden by a fold of skin called the:
a. cuticle
b. nail bed
c. lunula
d. nail body
a. cuticle
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Nerves, blood vessels, and lymphatic vessels all pierce the periosteum and enter the bone in the ________
A) None of the listed responses is correct. B) canaliculi C) lacunae D) perforating canal
Which of the elements of a reflex arc is responsible for delivering motor impulses from the central nervous system to effector organs?
A) motor neuron B) sensory neuron C) integration center D) sensory receptor
A spinal nerve carries information from the CNS to effectors as well as information from receptors to the CNS. How could these nerves be classified functionally?
A. Sensory B. Mixed C. Motor
You are in a car that stops suddenly. Your head jerks forward, then returns to its original position. Your brain is able to interpret this motion because of the action of ________ cells in the ________.
A. hair; semicircular canals B. basiliar; tectorial membrane C. retinal; cochlea D. ganglion; olfactory mucosa E. hair; saccule