Cardiac Muscles

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.

1. 
   only (iv)
2. 
   (ii) and (iii)
3. 
   (iii) and (iv)
4. 
   only (iii)

Q.

Intercalated discs are present in

1. Striated muscle

2. Unstriated muscle

3. Cardiac muscle

4. All of the above

Q. Difference between cardiac and smooth muscle.

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

1. Only (iv)
2. (ii) and (iii)
3. (iii) and (iv)
4. Only (iii)

Q. The four images given below represent the different types of animal tissues. Which one of these is correctly identified in the options given below?

1. A-Cardiac muscle tissue, B-Bone tissue, C-Columnar epithelium,
   D-Collagen fibres
2. A-Bone tissue, B-Cardiac muscle tissue, C-Collagen fibres,
   D-Columnar epithelium
3. A-Collagen fibres, B-Bone tissue,
   C-Columnar epithelium, D-Cardiac muscle tissue
4. A-Columnar epithelium, B-Bone tissue, C-Cardiac muscle tissue,
   D-Collagen fibres

Q.

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

Q. Which type of muscle has myogenic activity?
I. Cardiac muscle
II. Skeletal muscle
III. Smooth muscle

1. I
2. II
3. II and III
4. I and III

Q. Which one of the following statements describes the cardiac muscle?

1. Striated and involuntary
2. Non-striated and involuntary
3. Non-striated and voluntary
4. Striated and voluntary

Q.

Origin of heart beat and its conduction is represented by

1. A V node - Bundle of His - SA node - Purkinje fibres

2. SA node - Purkinje fibres - AV node - Bundle of His

3. Purkinje fibres - AV node - SA node - Bundle of His

4. SA node - AV node - Bundle of His - Purkinje fibres

Q.

What are the four levels of organisation in the human body?

Q.

Muscles with characteristic striations and involuntary are

1. Muscles in the wall of alimentary canal

2. Muscles of the heart

3. Muscles assisting locomotion

4. Muscles of the eyelids

Q.

Differentiate between voluntary and involuntary muscles. Give one example of each type.

Q. Which type of tissue correctly matches with its location?

	Tissue	Location
(A)	Transitional epithelium	Tip of nose
(B)	Cuboidal epithelium	Lining of stomach
(C)	Smooth muscle	Wall of intestine
(D)	Areolar tissue	Tendons

1. A
2. B
3. C
4. D

Q. Cardiac muscles are

1. striated, voluntary with syncytial condition
2. unstriated and involuntary
3. striated, involuntary with intercalated discs
4. involuntary and unstriated

Q.

All of the following are properties of cardiac muscle cells except

1. intercalated discs

2. branching fibers

3. shorter in duration of contraction than skeletal muscles.

4. involuntary

Q. Read the assertion and reason carefully to mark the correct option in question.

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.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
2. If assertion is true but reason is false.
3. If both assertion and reason are false.
4. If both assertion and reason are true but reason is not the correct explanation of the assertion.

Q. Purkinje's fibres are special types of-

1. Muscle fibres located in heart
2. Nerve fibres located in cerebrum
3. Connective tissue fibres joining one bone to another bone
4. Sensory fibres extending from retina into optic nerve

Q. Which of the following is not one of the four major types of tissues?

1. connective
2. skeletal muscle
3. epithelial
4. nervous

Q. Cardiac muscle fibres are

1. striated and involuntary
2. striated and voluntary
3. non-striated and involuntary
4. non-striated and voluntary

Q.

Intercalated discs containing gap junctions

1. are the Z bands of skeletal muscles

2. are where two cardiac muscles are fused together

3. separate smooth muscles from each other

4. make up the pacemaker in the heart

Q. Cardiac muscle is composed of:

1. Striated, branched and voluntary muscle fibres
2. Unstriated (smooth) spindle shaped and voluntary muscle fibres
3. Unstriated (smooth) spindle shaped and involuntary muscle fibres
4. Striated, branched and involuntary muscle fibres

Q.

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

Q. Which type of muscles are present in the abdominal wall?
(1)smooth muscle
(2)striated muscle

Q.

Intercalated discs are found in ______.

1. In striped muscles

2. Between neurons

3. At the junction of muscles and nerves

4. In cardiac muscles

Q. Identify how many statements are wrong?
(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

1. two
2. one
3. three
4. All four

Q.

What part of a muscle is the muscle fiber?

1. muscle cell itself

2. nuclei and the mitochondria

3. actin and myosin component

4. series-elastic component

Q. Which of the following is common in skeletal and cardiac muscles ?

1. Voluntary
2. Involuntary
3. Striated
4. None of the above

Q. Presence of disc is the characteristic feature of cardiac muscle.

Q.

Which of the following muscles is involuntary and is the most widely found throughout the body?

1. skeletal

2. smooth

3. cardiac

4. somatic

Q.

Movement in legs is brought by

1. striated muscle

2. Smooth muscle

3. unstriated muscle

4. cardiac muscle