Practical- Muscle Tissue, Nervous Tissue and Skin

Question 1

What are the characteristics of skeletal muscle fibers?

Answer 1

Long, unbranched, striated

Question 2

Characteristics of skeletal muscle fiber nuclei?

Answer 2

Multinucleate, flattened, found in periphery of muscle fibre

Question 3

Major component of I band

Answer 3

Actin

Question 4

Characteristics of cardiac muscle fibers

Answer 4

Striated, branched, involuntary

Question 5

Characteristics of cardiac muscle fiber nuclei

Answer 5

Single central nucleus, connected by specialized junctions

Question 6

3 cell-cell junctions present in intercalated discs of cardiac muscle

Answer 6

Fascia adherens junction
Expanded desmosomes
Gap junctions

Question 7

Characteristics of smooth muscle fibers

Answer 7

Spindle shaped

Question 8

Characteristics of smooth muscle fiber nuclei

Answer 8

Uninucleated, present in center of the cell

Question 9

Why does myelin sheath appear empty?

Answer 9

Because it is made of lipids and gets washed away during tissue prep