Mapa mental

Module 5

toriwickxo Inglês

Conteúdo do mapa

Module 5

muscular system performs three tasks
- movement
- posture
- heat production
three kinds of muscle tissue
- skeletal
  - striated (distinct, orderly, striped pattern)
  - voluntary muscles (muscles you can control)
    - includes all the muscles that move the bone, the tongue, and the diaphragm
  - long thin cells that are multinucleated
  - skeletal muscle structure
    - attached to bone with a tendon
      - tendon = dense regular connective tissue
- cardiac
  - only found in the heart
  - striated
  - each cell only has one nucleus
  - involuntary (you cannot control it)
- smooth
  - involuntary
  - called smooth because the cells are nonstriated (not striped)
  - cells are small & have one nucleus
muscle tissue has four major functional characteristics
- contractility (can contract forcefully)
- excitability (can produce action potential signals)
- extensibility (can passively stretch out / relaxing to normal length after being pulled on)
- elasticity (when a muscle is extended, it tends to recoil back to a shorter length)