MUSCULAR SYSTEM - PAGES 76-77

ANTAGONISTIC PAIRS
1. skeletal muscles work together to provide movement of the joints.
2. whilst one muscle contracts, other relaxes to create movement.
3. Muscles working together like this ^ are called antagonistic pairs .. lol pears
  1. REMEMBER THIS PLZ!! - muscles are connected to bones by tendons.
    1. When muscles contract they pull on the tendon which pull on the bone. This creates MOVEMENT.
4. Relaxing muscle = ANTAGONIST.
BICEPS AND TRICEPS
1. BICEPS
  1. front of upper arm.
    1. ROLE= flexion of arm @ elbow
      1. EG - upwards phase of a bicep curl
        During this movement the triceps is the ANTAGONIS - relaxes to allow biceps to contract
2. TRICEPS
  1. Back of upper arm
    1. ROLE= extension of arm @ elbow
      1. EG - straightening the arms in a chest press.
        bicep is antagonist - relaxes to let the triceps to contract
QUADRICEPS AND HAMSTRINGS
1. QUADRICEPS
  1. front of upper leg.
    1. ROLE = extension of leg at knee
      1. EG - straightening the leading leg going over a hurdle
2. HAMSTRING
  1. Back of upper leg
    1. ROLE = flexion of upper leg at knee
      1. EG - bending the trailing leg going over a hurdle
Skeletal muscles move the point at joints. words 2 use are :
1. flexion and extension

Resource summary

	Created by olivialouise1236 about 9 years ago