118exam2-fall05 - BIOLOGY 118 - EXAM 2 Oct. 26, 2005 -...

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BIOLOGY 118 - EXAM 2 Oct. 26, 2005 - VERSION A ..) on your answer sheet. You can keep this list of exam questions. You may write on it if you wish. Each question has only 1 correct answer. Indicate your choice on the answer sheet - scantron. If you are stumped by a question, place a mark by it, and return to it later. > = greater than < = less than Ach = acetylcholine PTH = parathyroid hormone BBB = Blood Brain Barrier PNS = peripheral nervous system interneuron = association neuron SR = sarcoplasmic reticulum CNS = central nervous system stapes = stirrup CSF = cerebrospinal fluid synaptic terminal = synaptic bulb or knob CP = creatine phosphate VNO = vomeronasal organ NE = Norepinephrine VO 2 max = maximum oxygen consumption 1. Bones are not brittle because they contain the protein _______, in addition to the calcium phosphates. This same protein is found in _______. a. collagen - tendons b. fibrin - tendons c. collagen - Schwann cells d. fibrin - Schwann cells 2. Osteoclasts are large cells that have a ________ surface area across which they ______ H + ions to digest bone. a. small - actively transport b. small - diffuse c. large - actively transport d. large - diffuse 3. When plasma calcium (Ca +2 ) is low, ______ helps increase plasma calcium back to normal. a. increased calcitonin secretion b. decreased Vitamin D activation c. increased PTH secretion d. decreased osteoclast activity 4. When UV light penetrates deeply through pale skin, your body’s plasma _______. a. Vitamin D decreases b. Vitamin A increases c. folate decreases d. iodine increases 5. Which food is a good source of both Vitamin D and calcium? a. cashews b. mackerel c. tomatoes d. rice 6. Which of the following can decrease your bone density? a. smoking b. amenorrhea c. anabolic steroids d. all of these 7. In figure B, the 4 lines represent average changes in bone density between male & female Caucasians & African Americans. Which line describes the bone density for an average African-American female? a. K b. J c. L d. N 8. Tendons connect bones to _______, but tendons repair more _____ than bone tissue because of their limited blood supply. a. muscle - easily b. muscle - poorly c. bones - easily d. bones - poorly
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9. Which line in figure A, best describes the production or proliferation of myoblasts (muscle stem cells) on the Y-axis if the X-axis is age from birth to maturity? a.
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118exam2-fall05 - BIOLOGY 118 - EXAM 2 Oct. 26, 2005 -...

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