Negative selection is the process by which cells learn self-tolerance.
Answer the following statement true (T) or false (F)
True
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A very thick connective tissue sheath, primarily composed of collagen fibers with scattered bands of elastic fibers, that blends into the surrounding tissues and assists in anchoring the blood vessel, is (the)
A) external elastic membrane. B) media. C) adventitia. D) capillary wall. E) None of the answers are correct.
_________________________ can occur to muscles that are infrequently used.?
Fill in the blank(s) with correct word
Which of the following is not true of the sediments found in urine samples?
A. The presence of epithelial cells that line the urinary tract in urine sediment indicates a urinary tract infection. B. Sediments are examined under a microscope. C. Many types are casts are normal sediments found in the urine. D. Normal sediments include mucus, particular crystals, and various cells. E. All of these are true of the sediments found in urine samples.
Which diagnostic exam can indicate whether there are abnormal cells in the bone marrow?
A. Lumbar puncture B. Lymph node biopsy C. Bone marrow aspiration and biopsy D. X-ray