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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Solution

(b) (ii) and (iii)

Smooth muscle and Cardiac muscles are involuntary muscles which are found in organs where voluntary movement is impossible, like the alimentary canal or the heart.

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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)

Q. Read the following statements carefully and select the correct ones.
(i) Cardiac fibres are branched with multiple nuclei
(ii) Smooth muscles are unbranched and cylindrical
(iii) Skeletal muscles can be branched or unbranched
(iv) Smooth muscles are non-striated

Fill in the blanks.

$\begin{matrix} Skeletal muscle & Smooth muscle & Cardiac muscle Movement type & i. - -------- - & Involuntary & Involuntary Structure & ii. - -------- - & Long cells with & iii. - -------- - pointed ends and uninucleate \end{matrix}$

Q. Study the following and identify the incorrect statements.
(I) Muscles of the iris and ciliary body are the smooth muscles of mesodermal origin
(II) Slow and sustained involuntary contractions of smooth muscles are called spasms.
(III) Quiescent mononucleate myogenic cells of skeletal muscles are called pericytes.
(IV) The skeletal muscle fibre is multi nucleate and is a syncitium.

Q. Match column I with column II and select the correct option from the codes given below.

Column I	Column II
A. Smooth muscle	(i) Myoglobin
B . Tropomyosin	(ii) Thin filament
C. Red muscle	(iii) Sutures
D. Skull	(iv) Involuntary

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Muscular Tissue

Standard IX Biology

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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)

(b) (ii) and (iii) Smooth muscle and Cardiac muscles are involuntary muscles which are found in organs where voluntary movement is impossible, like the alimentary canal or the heart.

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)

(b) (ii) and (iii)

Smooth muscle and Cardiac muscles are involuntary muscles which are found in organs where voluntary movement is impossible, like the alimentary canal or the heart.