MUSCULAR SYSTEM

Presentation By: Chris Bryant Jesse Curran

Overview

• All movements of the human body require muscles.

• Whether you punch a friend, or digest food, you are using your muscles.

Functions of the Muscle System

Muscle tone

Heart Beat

Distribution of heat

Propel body fluids/food

Structure of Skeletal Muscle

Structure of a Muscle Fiber

How a Muscle Contracts

https://www.youtube.com/watch?v=9ahYCeeoabc

Energy

Creatine phosphate ADP +ATP Glycolysis Cell Respiration

Anaerobic & Aerobic

Anaerobic: without oxygen Aerobic: with oxygen

Summation Definition: A

muscle fiber exposed to a series of stimuli of increasing frequency reaches a point when it is unable to completely relax before the next stimulus in the series.

Sustained Contractions & Muscle Tone

Even when muscles appear to be at rest they are sustaining some contraction giving them Muscle Tone.

Recruitment: An increase in the number of motor units being activated during intense activity.

Major anterior and posterior Muscles

Parts of Muscle

Origin: immovable end of a muscle

Insertion: the movable end

Prime mover: main muscle moving

Synergists: stabilizer muscles

Antagonist: opposing the prime mover Example: triceps and biceps

Diseases and Disorders

Dushenne Muscular Dystrophy: protein dystrophin is missing Helps attach cell to surrounding extracellular

matrix. Fatty and connective tissue replaces muscle.

Chariot-Marie-Tooth Disease: slowly progressing weakness in muscles of the hand and feet and decrease in tendon reflexes. Extra gene impairs insulting sheath around

nerve cells so cannot correctly stimulate involved muscles.

Works Cited stepson-clipart-5767-exhausted-female-marathon-runner-drinking-water-

clipart-illustration1 http://www.bing.com/images/search?q=muscle%20system%20diagram&qs=

IM&form=QBIRMH&pq=muscle%20system%20&sc=8-14&sp=1&sk=#view=detail&id=466F1F368100C1C8A6A94940EDA3EE779287BD27&selectedIndex=67

http://www.bing.com/images/search?q=muscle%20system%20diagram&qs=IM&form=QBIRMH&pq=muscle%20system%20&sc=8-14&sp=1&sk=#view=detail&id=59316EC2CCCA3E8E418EB55DD02E53C6D58C5AE9&selectedIndex=135

http://www.bing.com/images/search?q=heart%20beating%20gif&qs=n&form=QBIRMH&pq=heart%20beating%20gif&sc=5-17&sp=-1&sk=#view=detail&id=AE6F352726C7DEC7E999F05F56F7D9C1588C3D52&selectedIndex=91

http://www.wpclipart.com/energy/atom/atomic_particle.png