All of the following are properties of cardiac muscle cells except

intercalated discs

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involuntary

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branching fibers

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shorter in duration of contraction than skeletal muscles.

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Solution

The correct option is D
shorter in duration of contraction than skeletal muscles.

cardiac muscles contract and relax rhythmically

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Q. Study the following and identify the incorrect statements
(i) Muscles of iris and ciliary body are smooth muscles of mesodermal origin
(ii) Slow and sustained involuntary contraction of smooth muscles are called spasms
(iii) Quiescent mononucleate myogenic cells of skeletal muscles are called pericytes
(iv) Skeletal muscles fibre is multinucleate and is a syncytium

Q. Read the following statements carefully and select the correct ones.

(i) Cardiac fibers are branched with one or more nuclei.

(ii) Smooth muscles are unbranched and cylindrical.

(iii) Skeletal muscles can be branched or unbranched.

(iv) Smooth muscles are non–striated.

Q. Assertion :Intercalated discs are important regions of cardiac muscle cells. Reason: Intercalated discs function as boosters for muscle contraction waves.

Question 8
Which of the following types of muscle are involuntary?
(i) Striated muscle
(ii) Smooth muscle
(iii) Cardiac muscle
(iv) Skeletal muscle

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

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All of the following are properties of cardiac muscle cells except

The correct option is D shorter in duration of contraction than skeletal muscles. cardiac muscles contract and relax rhythmically

The correct option is D
shorter in duration of contraction than skeletal muscles.

cardiac muscles contract and relax rhythmically