Biology 449 - Animal Physiology October 6, 2008

Lecture 16 -Muscle I

Functions and types of muscle

Structure of skeletal muscle

Contraction of the sarcomere

Excitation-contraction coupling

Excitation

Contraction

Tropomyosin and troponin

Cross-bridge cycling

Terms to Know

Smooth muscle
Striated muscle
Skeletal muscle
Cardiac muscle

Muscle
Tendon

Muscle fiber (myofiber)
Sarcolemma
Mitochondria
Sarcoplasmic reticulum
Myofibril

 

Sarcomere
Thick filament
Thin filament
Z-disc (or Z-line)
Actin
Myosin

Cross-bridge cycle
Contraction
Sliding-filament theory

Motor neuron
Neuromuscular junction (aka endplate)
Sarcolemma
Transverse tubules (T-tubules)
Sarcoplasm (aka myoplasm)
T (Transverse) tubules
Dihydropyridine receptors
Ryanodine receptors (or channels)

Tropomyosin
Troponin

 

Readings

Lectures 16-18:   Chapter 8, pages 314-342