How do you distinguish between a skeletal muscle and a cardiac muscle?

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Skeletal muscle  Cardiac muscle 1 The cells of skeletal muscles are unbranched. 1 The cells of cardiac muscles are branched. 2 Intercalated disks are absent. 2 The cells are joined with one another by intercalated disks that help in coordination or synchronization of the heartbeat. 3 Alternate light and dark bands are present. 3 Faint bands are present. 4 They are voluntary muscles. 4 They are involuntary muscles. 5 They contract rapidly and get fatigued in a short span of time. 5 They contract rapidly but do not get fatigued easily.  6 They are present in body parts such as the legs, tongue, hands, etc. 6 These muscles are present in the heart and control the contraction and relaxation of the heart.

λ (nm)	500	450	400
v × 10^–5(cm s^–1)	2.55	4.35	5.35

How do you distinguish between a skeletal muscle and a cardiac muscle?

Solution and Explanation

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Questions Asked in CBSE Class XI exam

Skeletal muscle		Cardiac muscle
1	The cells of skeletal muscles are unbranched.	1	The cells of cardiac muscles are branched.
2	Intercalated disks are absent.	2	The cells are joined with one another by intercalated disks that help in coordination or synchronization of the heartbeat.
3	Alternate light and dark bands are present.	3	Faint bands are present.
4	They are voluntary muscles.	4	They are involuntary muscles.
5	They contract rapidly and get fatigued in a short span of time.	5	They contract rapidly but do not get fatigued easily.
6	They are present in body parts such as the legs, tongue, hands, etc.	6	These muscles are present in the heart and control the contraction and relaxation of the heart.