Question

Homework: Smooth and striated muscle share many common features, including ...

Group of answer choices

organization of filaments into sarcomeres

use of actin and myosin in contraction

a ratio of 2:1 thin to thick filaments

dependence on T-tubules for spread of depolarization

Answer 1

The smooth muscles and striated muscles have many differences between them. Among these differences, some of them are:

1. The ratio of thin is to thick filaments in smooth muscles is close to 10:1 when compared to the 2:1 ratio in striated muscles.

2. The smooth muscles depend on the gap junctions for the spread of depolarisation, whereas the striated muscles depend on the T tubules for the conduction of depolarization.

3. The smooth muscles lack the sarcomere whereas striated muscles have the sarcomere present in them.

The only similarity in both smooth and striated muscles is that both of them have actin and myosin filaments.

Hence the correct answer is: use of actin and myosin in contraction.

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