Cardiac Muscles

Q.

Which of the following types of muscles contain intercalated discs and branching fibers?

1. smooth

2. cardiac

3. all of the above

4. skeletal

Q.

Which one of the following differentiates cardiac muscles from skeletal muscles

1. Centrally located single nucleus

2. Fewer mitochondria

3. Difference in myofibrils

4. Fewer myosin and actin bands

Q.

The type of muscle present in

1. Heart is involuntary and unstriated smooth muscle

2. Intestine is striated and voluntary

3. Thigh is striated and voluntary

4. Upper arm is smooth muscle and fusiform in shape

Q.

Cardiac muscles are straited muscles with fibres being

1. Nucleated and voluntary

2. Nucleated and involuntary

3. Multinucleated and voluntary

4. Multinucleated and involuntary

Q. Cardiac muscles are voluntary muscles.

1. False
2. True

Q.

Identify the type of muscles shown in the following figure.

1. a – Smooth muscle, b – Cardiac muscle, c – Skeletal muscle
2. a – Skeletal muscle, b – Smooth muscle, c – Cardiac muscle
3. a –Cardiac muscle, b – Smooth muscle, c – Skeletal muscle
4. a – Smooth muscle, b – Skeletal muscle, c – Cardiac muscle

Q. Fill in the blanks.

$\begin{array}{cccc}& Skeletalmuscle& Smoothmuscle& Cardiacmuscle\\ Movementtype& i.\underset{–}{}& Involuntary& Involuntary\\ Structure& ii.\underset{–}{}& Longcellswith& iii.\underset{–}{}\\ & & pointedendsand& \\ & & uninucleate& \end{array}$

1. i - Voluntary, ii - Cylindrical, branched and uninucleated, iii - Long, cylindrical, unbranched and multinucleated
2. i - Involuntary, ii - Cylindrical, branched and uninucleated, iii - Long, cylindrical, unbranched and multinucleated
3. i - Involuntary, ii - Long, cylindrical, unbranched and multinucleated, iii - Cylindrical, branched and uninucleated.
4. i - Voluntary, ii - Long, cylindrical, unbranched and multinucleated, iii - Cylindrical, branched and uninucleated.

Q. Which of the following is not the characteristic of cardiac muscles?

1. Branched
2. Multinucleated
3. Striated
4. Involuntary

Q.

Identify the incorrect statement.

1. Cardiac muscle is striated muscles and Involuntary in function.

2. Cardiac muscles is non striated muscles and voluntary in function.

3. Skeletal muscle is striated and muscles voluntary in function.

4. Reproductive tract is visceral and smooth muscles involuntary in function.

Q. Cardiac muscles are involuntary muscles.

1. True
2. False