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Final Exam, 8-9 Lecture

Explore the two major types of muscle, smooth and striated, diving into their structure, contraction process, and relaxation mechanisms. Gain insights into nerve control, sliding filament hypothesis, and length-tension relationship.

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Final Exam, 8-9 Lecture

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  1. Final Exam, 8-9 Lecture BUR 106, Tuesday, May 13, 9 am-12 noon

  2. Final Exam, 9-10 Lecture ART 1.102, Friday, May 9, 2-5 pm

  3. Final Exam, 2-3 Lecture BUR 106, Monday, May 12, 9 am-12 noon

  4. Two major types of muscle • Smooth • Striated a. skeletal b. cardiac

  5. My knowledge about striated muscle I know the structure: A, I bands, Z lines I know the sliding filament hypothesis, the cycling of actin and myosin I know how muscle relaxes I understand how muscle contractions are controlled by nerves (motor units) I know what twitch and tetanus mean

  6. I know • All of this • Most of this • Some of this • None of this

  7. Set-up for the experiment

  8. How does a muscle fiber contract?How does the nerve command the contraction?How does a muscle fiber relax?How is smooth, graded force generated in a muscle?

  9. The length-tension relationship

  10. What is the switch for muscle fiber contraction? • ATP • Myosin • Actin • Ca++

  11. Why does skeletal muscle relax? • the action potential is over and the muscle fiber returns to its resting membrane potential • Ca++ is sequestered into the SR • muscle runs out of ATP • an inhibitory neurotransmitter is released that causes the muscle to relax.

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