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Muscular System Answer Key

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General Information
#1 Name the 3 types of muscles. smooth, cardiac, and skeletal
#2 Do muscles push or pull? pull
#3 If the bicep is a flexor, what is the tricep? an extensor
#4 When the biceps contract, the triceps do what? relax
#5 About what percent of your body's weight is muscle? 40%
Smooth and Cardiac Muscles
#1 Are smooth and cardiac muscles voluntary or involutary and what does that mean? Involutary, meaning they work even if you're not trying.
#2 Give one example of a cardiac muscle. heart
#3 Give one example of a smooth muscle. bladder, stomach, esophagus, intestine, etc.
#4 What is the scientific name for 'heart'? myocardium
#5 Smooth muscles are found in the ________ __________ and the __________ ___________. blood vessels and digestive tract
Skeletal Muscles
#1 Are skeletal muscles volutary or involutary and what does that mean? Voluntary, meaning you decide when and how to move them.
#2 Give one example of a skeletal muscle. biceps, triceps, quadriceps, hamstring, gluteus maximus, etc.
#3 Skeletal muscles are connected to the bones by what? tendons
#4 Skeletal muscles help protect inner _______________. organs
#5 Skeletal muscles move __________. bones
Major Muscles in the Human Body
#1 This is a broad thick muscle found in our rear end, it supports the pelvis and upper body so we can stand upright. gluteus maximus
#2 This muscle is located on the front of the upper arm, it is used to rotate the forearm and flex the elbow. biceps
#3 This is the muscle that forms around the shoulders, it is the prime mover of the arm and allows rotation. deltoids
#4 This is the back thigh muscle, which flexes the knee. hamstring
#5 This is a thick fan-shaped muscle found in the chest, it helps for taking deep breaths and picking up heavy objects. pectorals
Identify that Muscle!
#1 What muscle is being shown?'>'> rectus abdominus (abs)
#2 What muscle is being shown?'> triceps
#3 What muscle is being shown? quadriceps (quads)
#4 What muslce is being shown? trapezius (traps)
#5 What is being shown? gastrocnemius (calf)
Final Question