Which of the following statements is correct with respect to the sites of synthesis of B and T cells?
A) In bony fish, B cells are produced in the kidney or spleen.
B) In most vertebrates, B cells are produced in body cells, but in different locations of the body.
C) Jawless fish produce T cells in the thymus.
D) Bony and cartilaginous fish produce T cells in the gill region, referred to as the thymoids.
Answer: A
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T cells mature in the __________.
Fill in the blank(s) with the appropriate word(s).
The vitamin that is a coenzyme in amino acid and nucleic acid metabolism is
A) pantothenic acid. B) pyridoxine (B6). C) folic acid (folate). D) vitamin C. E) vitamin K.
Which disorder is characterized by an exaggerated response of the sympathetic division of the ANS that occurs in most individuals with spinal cord injury at or above T6?
a) Raynaud's phenomenon b) Autonomic dysreflexia c) Reflex sympathetic dystrophy d) Diabetic neuropathy e) Horner's Syndrome
When myosin heads form cross-bridges during muscle contractions, they bind to binding sites found on _____, a component of thin filaments.
a. myosin b. actin c. intrafusal d. extrafusal e. myofibril