h phys exam III--spring 2011--answer key

h phys exam III--spring 2011--answer key - Name: Trask Zool...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: 1 | Page Trask Zool 2200: Human Physiology Exam 3 03/26/11 Section I: Multiple Choice Section I: Multiple Choice. Answer each of the following questions by filling in the circle on your answer key that corresponds with the BEST answer. (52 points total). 1.) T tubules can be best described to: a.) Function to increase skeletal muscle membrane surface area. b.) Serve a structural supportive role. c.) Function as an extension of the cell membrane into the interior of a muscle fiber. d.) Serve as an anchor for the RyR (ryodine receptor). e.) Bind to the Z disc of a sarcomere. 2.) The movement of a skeletal muscle cell is responsible for generating an action potential. a.) Sodium / out of b.) Sodium / into c.) Calcium / into d.) Potassium / out of e.) Potassium / into 3.) The movement of into the is responsible for skeletal muscle relaxation of a skeletal muscle cell. a.) Sodium / extracellular space b.) Sodium / cytoplasm c.) Calcium / extracellular space d.) Calcium / sarcoplasmic reticulum e.) Potassium / extracellular space f.) Potassium / cytoplasm g.) Both a. and f. h.) Both b. and e. i.) Both c. and d. 4.) Creatine kinase functions: a.) To phosphorylate creatine b.) To synthesize myoglobin c.) To contribute to the dark color of ‘dark meat’ muscles. d.) More in cardiac muscles than in skeletal muscles due to their continual contraction. e.) Depend upon nutritive supplements.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 | Page 5.) Which of the following is likely associated with generation of the most contractile force? A. B. C. D. It is impossible to tell 6.) Which of the following does not contribute to the amount of force generated by skeletal muscles? a.) The degree of actin-myosin overlap in a sarcomere. b.) The frequency of action potentials generated through nervous stimulation. c.) The number of muscle motor units recruited. d.) The amount of Ca ++ available to bind troponin. e.) The types of muscle cells recruited. f.) All of the above contribute to the amount of force generated. 7.) Temporal summation in skeletal muscles results in: a.) More frequent action potentials. b.) More frequent twitches. c.) More forceful contraction. d.) Unfused tetanus. e.) All of the above. f.) None of the above. 8.) Which type of athlete would you expect to have the greatest number of fast twitch muscle fibers? a.) A sprinter. b.) A marathon runner. 9.) The myosin in which of the following muscle types has the slowest rate of ATP hydrolysis? a.) Fast twitch skeletal muscle fibers. b.) Slow twitch skeletal muscle fibers. c.) Single unit smooth muscle fibers. d.) Cardiac muscle fibers. 10.) The ability of slow twitch muscles to resist fatigue is at least partially dependent upon: a.) The absence of myoglobin b.) Relatively high vascularization c.) Large storage reserves of ATP d.) Large motor units e.) Both a. and b.
Background image of page 2
3 | Page 11.) Which of these muscle types contains gap junctions? a.)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

h phys exam III--spring 2011--answer key - Name: Trask Zool...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online