Presentation is loading. Please wait.

Presentation is loading. Please wait.

Types of Muscle, structure and Function. Types of muscle ► 3 General types ► 1) Smooth (visceral) muscle ► Loosely associated fibers ► Peristalsis ► Found.

Similar presentations


Presentation on theme: "Types of Muscle, structure and Function. Types of muscle ► 3 General types ► 1) Smooth (visceral) muscle ► Loosely associated fibers ► Peristalsis ► Found."— Presentation transcript:

1 Types of Muscle, structure and Function

2 Types of muscle ► 3 General types ► 1) Smooth (visceral) muscle ► Loosely associated fibers ► Peristalsis ► Found in dig. tract, lungs, arteries

3 Cardiac Muscle ► Tightly associated fibers ► Gap junction and intercalated discs allow for quick exchange between cells ► Found only in the heart

4 Skeletal Muscle ► Tightly associated fibers ► Responsible for moving the skeleton ► Found everywhere in the body attached to skeleton

5 Structure of Skeletal Muscles ► Long thin fibers of sarcomeres connected end-to- end ► Fibers bundled into fascicles

6 Sarcomere

7 Sarcomere ► Basic unit of contraction ► Sarcolemma surrounds it ► Actin – thin filament ► Mysosin- thick filament ► Tropomyosin covers myosin clubs to prevent bonding during relaxation

8 How contraction occurs ► Brain triggers muscle to contract ► Message travels down nerve ► Crosses synapse and hits sarcolemma

9 Next…. ► Sarcolemma releases Calcium ions into sarcomere ► Ca binds with troponin ► Triggers tropomyosin to move

10 Contraction begins ► With tropomyosin out of the way, myosin clubs attach to actin filament ► Forms cross bridges

11 Finally… ► ATP binds to cross bridge ► Causes club position to move ► Pulls actin fiber with it ► Shortened sarcomere = contraction

12 After contraction ► ATP is required to break bonds and relax muscle ► Rigor mortis


Download ppt "Types of Muscle, structure and Function. Types of muscle ► 3 General types ► 1) Smooth (visceral) muscle ► Loosely associated fibers ► Peristalsis ► Found."

Similar presentations


Ads by Google