The correspondence between a unit of DNA information and an amino acid is the genetic ________.
Fill in the blank(s) with the appropriate word(s).
code
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Lymphoid stem cells mature into
A. B-lymphocytes and T-lymphocytes. B. B-lymphocytes. C. B-lymphocytes, T-lymphocytes, and NK cells. D. T-lymphocytes. E. B-lymphocytes, T-lymphocytes, and monocytes.
Match the following:
A) Epidermal dendritic cells B) Keratinocytes C) Merkel disc D) Keratin E) Cornified keratinocytes 1) The most abundant cells of the epidermis. 2) The protein found in the epidermis that is responsible for toughening the skin. 3) Cells plus a disc-like sensory nerve ending that functions as a sensory receptor for touch. 4) Skin macrophages that help activate the immune system. 5) Cell remnants of the stratum corneum.
Tetanus toxin prevents release of serotonin from inhibitory presynaptic inputs terminating at neurons that supply skeletal muscles
a. True b. False Indicate whether the statement is true or false
Which of the following statements about parathyroid hormone is incorrect?
a. It causes localized dissolution of bone. b. It conserves Ca2+ by the kidney. c. It promotes urinary excretion of PO4. d. It directly stimulates Ca2+ absorption from the intestine. e. It is essential for life.