Muscle Tissue

1. Specialized junctions
2. Adhering junctions
3. Tight junctions
4. Gap junctions

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

What is the difference between plasmodesmata and gap junction?

1. Ectoderm
2. Mesoderm
3. Endoderm
4. Epiderm

Give examples of muscles that are striated.

1. Perimysium
2. Epimysium
3. Endocardium
4. Endomysium

1. sarcomere
2. neuromere
3. sarcoplasm
4. metamere

Nerve fibres differ from muscle fibres in having

1. Myofibrils

2. Striations

3. Sarcolemma

4. Dendrites

Cuboidal: Epithelial:: Cardiac: _______

1. Muscular

2. Epithelial

3. Nervous

4. Connective

1. epithelial--capillary lining
2. connective--storage of fat
3. nervous--integration of data
4. muscle--protection from pathogens

Which of the following statements concerning the role of Ca2+ in the contraction of skeletal muscle is correct?

1. The mitochondria act as a store of Ca2+ for the contractile process

2. Ca2+ entry across the plasma membrane is important in sustaining the contraction of skeletal muscle

3. The tension of a skeletal muscle fibre is partly regulated by G proteins.

4. A rise in intracellular Ca2+allows actin to interact with myosin

Of the following muscle types, which one does NOT have striations?

1. skeletal muscle

2. cardiac muscle

3. smooth muscle

4. None of the above

1. Voluntary muscle fibre cell
2. Nerve cell
3. Striated muscle fibre cell
4. Cardiac muscle fibre cell.

1. Epithelial tissue--capillary lining
2. Connective tissue--storage of fat
3. Muscle tissue--protection from pathogens
4. Nerve cells -- generate and conduct impulses

1. Skeletal muscles are straited
2. Skeletal muscles are attached to bones by tendons
3. Skeletal muscle is under voluntary System
4. Skeletal muscle contracts the heart to pump blood.

Which of the following is correctly matched?

1. actin -- major component of the A band of a sarcomere

2. myosin -- major component of thick filaments

3. tropomyosin -- calcium binding protein of skeletal muscle

4. troponin -- interferes with the binding of myosin to actin

Myosin filaments are localised in-

1. Z- Band

2. H- Band

3. A- Band

4. None of these

1. Somatopleure
2. Splanchnopleure
3. Somatic mesoderm
4. Primary spermatocyte and spermatid

What is neurogenic ectoderm?

The tissue which is derived from the mesoderm and covers almost 50% of our body is_____.

1. Epithelial

2. Nerve

3. Muscle

4. Connective

The ultrastructure of a muscle contains many micro units are called as ___________

1. Myofibrils

2. Macrofibrils

3. Mesofibrils

4. Microfibrils

1. Made up of many fibres
2. Made up of many proteins
3. Long and slender
4. Multinucleated
5. Swollen in the middle with tapered ends

Muscle cells are also called myofibrils.

Muscle cells are very thin and elongated.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

1. Z-band
2. A-band
3. Myofibril
4. Sarcomere

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

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

1. Part between two H-lines
2. Part between two A-lines
3. Part between two I-bands
4. Part between two Z-lines