Module 7 Worksheet (Muscles) BIO 326 1. What are the three main muscle types and

Question

Module 7 Worksheet (Muscles)

BIO 326

1. What are the three main muscle types and describe their characteristics (striated or not, duration of muscle twitch, purpose).

b. Describe how skeletal muscle contracts. What ion is important and what happens when it increases in abundance inside the cell? How does the muscle relax again?

c. Why do t-tubules need to be closely associated with the sarcoplasmic reticulum?

d. Describe how the pacemaker (auto rhythmic) cells generate a repetitive series of action potentials.

e. Why is cardiac muscle not prone to tetanus

Explanation / Answer

Ans. 1 (a)

The three main types of muscles are:

1. Skeletal muscle - it is connected at either or both ends to a bone

2.smooth - muscles found in walls of internal organs such as stomach and intestine

3.cardiac - muscle tissue of the heart

Characterstics of skeletal

Characterstics of smooth:

Characterstics of cardiac:

Ans 1(b)

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