final exam, 8-9 lecture

Final Exam, 8-9 Lecture

JES A121A, Tuesday, May 19,

2-5

Final Exam, 9-10 Lecture

JES A121A, Tuesday, May 19, 9-12

Final Exam, 2-3 Lecture

JES A121A, Friday, May 15, 9 -12

Two major types of muscle

A. SmoothB. Striated

a. skeletal

b. cardiac

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

I know

A. All of this

B. Most of this

C. Some of this

D. None of this

Set-up for the experiment

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?

The length-tension relationship

What is the switch for muscle fiber contraction?

A. ATP

B. Myosin

C. Actin

D. Ca++

Why does skeletal muscle relax?

A. the action potential is over and the muscle fiber returns to its resting membrane potential

B. Ca++ is sequestered into the SR

C. muscle runs out of ATP

D. an inhibitory neurotransmitter is released that causes the muscle to relax.