Question

1. In reference to muscle histology, describe at least TWO major histological similarities that may be seen in H&E sections of skeletal muscle and cardiac muscle? To answer this question, you will need to imagine both longitudinal and cross sections of the two types of muscle.

2. In reference to muscle histology, describe at least THREE histological differences that may be seen in H&E sections of skeletal muscle and cardiac muscle? To answer this question, you will need to imagine both longitudinal and cross-sections of the two types of muscle

3. The Purkinje fibres found in the heart are very important for the physiology of cardiac muscle contraction. Discuss.

Answer 1

1.

Two major histological similrities

Both skeletal muscle and cardiac muscle has Ca2+  as cheif ions

Both skeletal and cardiac muscle Invaginating network of T-tubules and sarcoplasmic reticulum

2.

Three Histological differences

cardiac

Skeletal

3.

The importance of purkinje fibers