Which of the following cell types binds to antigens on plasma membranes of target cells and directly destroys the cells?
A. Cytotoxic T cells (CD8 cells)
B. B cells
C. Helper T cells (CD4 cells)
D. NK cells
E. Neutrophils
Answer: A
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Which of the following is NOT a cause of an aural hematoma?
a. otitis b. ear mites c. bite wound d. all of the above are causes of aural hematomas
As a general rule, the nervous system coordinates ________ while the endocrine system regulates ________
a. nervous activity, endometrial activity b. rapid responses, long lasting activities c. nail-biting, immune responses d. feeding behavior, digestion
Muscles located entirely within an organ are called
A) internus. B) extrinsic. C) profundus. D) intrinsic. E) externus.
what are the actions of the trapezius?
a) flexes the lumbar vertebral column b) flexes the back; stabilizes scapula during arm flexion c) extends and laterally flexes neck d) rotation of vertebral column