Among the three categories of lymphocytes, it is the ________ killer cells that attack abnormal and infected tissue cells.
Fill in the blank(s) with the appropriate word(s).
natural
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Which of the listed cranial bones contain the organs of hearing and balance, and articulate with the mandible?
a) Frontal b) Temporal c) Parietal d) Occipital e) Nasal
The origins of the extrinsic muscles of the hand are the
A) scapula and humerus. B) flexor retinaculum. C) humerus, radius, and ulna. D) carpals and metacarpals. E) ulna and radius.
Vestibular neurons transmit nerve impulses along the vestibulocochlear nerve to all of the following sites except
A. the cerebrum. B. the cerebellum. C. the brainstem. D. the thalamus. E. All of these sites are destinations for neural information from the vestibular neurons.
The underlying cause of Tay-Sachs disease is __________.
A)the muscle cells store excess lipids B)the lack of sufficient lysosomes in the nervous system C)the lysosomes lack an enzyme needed to break down a specific glycolipid in nerve cell membranes D)the ingestion of excess lipids in the diet