Cardiac Muscles
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(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.
only (iv)
(ii) and (iii)
(iii) and (iv)
only (iii)
Intercalated discs are present in
Striated muscle
Unstriated muscle
Cardiac muscle
All of the above
(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
- Only (iv)
- (ii) and (iii)
- (iii) and (iv)
- Only (iii)
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- A-Cardiac muscle tissue, B-Bone tissue, C-Columnar epithelium,
D-Collagen fibres - A-Bone tissue, B-Cardiac muscle tissue, C-Collagen fibres,
D-Columnar epithelium - A-Collagen fibres, B-Bone tissue,
C-Columnar epithelium, D-Cardiac muscle tissue - A-Columnar epithelium, B-Bone tissue, C-Cardiac muscle tissue,
D-Collagen fibres
Which one of the following statement is incorrect?
(a) Heart muscles are striated and involuntary
(b) The muscles of hands and legs are striated and voluntary
(c) The muscles located in the inner walls of alimentary canal are striated and involuntary
(d) Muscles located in the reproductive tracts are unstriated and involuntary
I. Cardiac muscle
II. Skeletal muscle
III. Smooth muscle
- I
- II
- II and III
- I and III
- Striated and involuntary
- Non-striated and involuntary
- Non-striated and voluntary
- Striated and voluntary
Origin of heart beat and its conduction is represented by
A V node - Bundle of His - SA node - Purkinje fibres
SA node - Purkinje fibres - AV node - Bundle of His
Purkinje fibres - AV node - SA node - Bundle of His
SA node - AV node - Bundle of His - Purkinje fibres
What are the four levels of organisation in the human body?
Muscles with characteristic striations and involuntary are
Muscles in the wall of alimentary canal
Muscles of the heart
Muscles assisting locomotion
Muscles of the eyelids
Differentiate between voluntary and involuntary muscles. Give one example of each type.
Tissue | Location | |
(A) | Transitional epithelium | Tip of nose |
(B) | Cuboidal epithelium | Lining of stomach |
(C) | Smooth muscle | Wall of intestine |
(D) | Areolar tissue | Tendons |
- A
- B
- C
- D
- striated, voluntary with syncytial condition
- unstriated and involuntary
- striated, involuntary with intercalated discs
- involuntary and unstriated
All of the following are properties of cardiac muscle cells except
intercalated discs
branching fibers
shorter in duration of contraction than skeletal muscles.
involuntary
Assertion: Skeletal muscles are also known as voluntary muscles.
Reason: The activity of the skeletal muscles are under the voluntary control of the nervous system.
- If both assertion and reason are true and the reason is the correct explanation of the assertion.
- If assertion is true but reason is false.
- If both assertion and reason are false.
- If both assertion and reason are true but reason is not the correct explanation of the assertion.
- Muscle fibres located in heart
- Nerve fibres located in cerebrum
- Connective tissue fibres joining one bone to another bone
- Sensory fibres extending from retina into optic nerve
- connective
- skeletal muscle
- epithelial
- nervous
- striated and involuntary
- striated and voluntary
- non-striated and involuntary
- non-striated and voluntary
Intercalated discs containing gap junctions
are the Z bands of skeletal muscles
are where two cardiac muscles are fused together
separate smooth muscles from each other
make up the pacemaker in the heart
- Striated, branched and voluntary muscle fibres
- Unstriated (smooth) spindle shaped and voluntary muscle fibres
- Unstriated (smooth) spindle shaped and involuntary muscle fibres
- Striated, branched and involuntary muscle fibres
Muscles with characteristic striations and involuntary are
(a) muscles in the wall of alimentary canal
(b) muscles of the heart
(c) muscles assisting locomotion
(d) muscles of the eyelids
(1)smooth muscle
(2)striated muscle
Intercalated discs are found in ______.
In striped muscles
Between neurons
At the junction of muscles and nerves
In cardiac muscles
(a) visceral muscles are striated.
(b) Intercalated discs are a feature of all striated muscles.
(c) smooth muscle fibres are muttinucleated
(d) sarcosomes store calcium ions needed for muscle contraction
- two
- one
- three
- All four
What part of a muscle is the muscle fiber?
muscle cell itself
nuclei and the mitochondria
actin and myosin component
series-elastic component
- Voluntary
- Involuntary
- Striated
- None of the above
Which of the following muscles is involuntary and is the most widely found throughout the body?
skeletal
smooth
cardiac
somatic
Movement in legs is brought by
striated muscle
Smooth muscle
unstriated muscle
cardiac muscle