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Muscular System Quiz ( This is an incomplete study guide. Also review your notes, labs and the power points found on-line. . Learning Target: Compare skeletal, smooth and cardiac muscle cells and tissue. (knowledge). Muscle Cells…. Identifying Types of Muscle Tissue. Smooth. Cardiac.
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Muscular SystemQuiz(This is an incomplete study guide. Also review your notes, labs and the power points found on-line.
Learning Target: Compare skeletal, smooth and cardiac muscle cells and tissue. (knowledge)
Identifying Types of Muscle Tissue Smooth Cardiac Skeletal
Match Types of Tissues With Their Functions Transmits impulses and messages Allows heart to pump blood Allows internal organs and arteries to contract Allows for movement of bones at joints Supplies nutrients and removes wastes Separates, covers and holds muscles in place ____ Nervous Tissue ____ Skeletal Muscle Tissue ____ Blood ____ Smooth Muscle Tissue ____ Connective Tissue ____ Cardiac Muscle Tissue A D E C F B
Learning Target: Identify the major parts of skeletal muscle fiber and the function of each part. (knowledge)
Label a Skeletal Muscle Fiber Actin Filament Myofibril Myosin Filament Sarcomere Sarcoplasmic Reticulum Skeletal Muscle Fiber
Learning Target: Investigate the relationship between bones, tendons, and muscles in producing body movements. (reasoning)
Tendons T/B Tendons attach muscle to muscle. bone
Learning Target: Define the terms action, origin, and insertion. (knowledge)
Fill in the Blank The location where the muscle is attached to the relatively immovable end of the bone is called the ______. The _________ is the end of the muscle that is attached to the ________ bone. immovable insertion movable origin
Truth or Bologna T/B Muscles have to work in pairs so that a muscle doesn’t get stuck in a certain position. T/B A ligament attaches muscle to muscle. bone to bone
Learning Target: State the source of energy, cause, steps and final result of a muscle fiber contraction. (knowledge)
Muscle Contractions T/B Muscle contractions occur when a nerve impulse releases acetylcholine into muscle fibers. What is the energy source for a muscle contraction? a. ADP b. ATP c. calcium True
Sliding Filament Theory Which state does this picture represent? Resting
Step 1: Action potential • A nerve action potential releases acetylcholine/ADP into the synaptic cleft opening the Na+ channels. • Action potential spreads across synaptic cleft/sarcolemma releasing CA into the sarcoplasma. Step 2: Myosin-actin binding Ca/Na+ binds to troponin A shape change in troponin moves tropomyocin out of the way of myosin/actin binding site Actin and myosin bind using energy from cleaved ADP/ATP
Step 3: Power Stroke • Side arms pivot so myosin and actin slide by each other shortening the __________ • ____ and P released (low energy) Step 4: ATP binding and actin-myosin release A different ____ molecule binds to the active site _______ released ADP actin sarcomere ATP
What step does this picture represent? Step 5: ATP cleavage 1. Return to high energy state 2. Cycle will repeat if calcium is still available
What 3 physical changes take place when a skeletal muscle contracts? A. becomes harder B. gets shorter C. diameter increases D. diameter decreases
Muscle Cramps T/B When calcium is not available the muscle stays contracted which causes a muscle cramp. Bologna – when ATP isn’t available the muscle cramps
Rigor Mortis T/B Rigor mortis is a stiffening of the body because of continuous muscle contraction after death. True Why does rigor mortis occur? a. lack of ATP production b. high supply of Ca ions c. low supply of Ca ions d. a & b
Learning Target: Interpret data from an electromyogram. (skill)
What is an EMG? An EMG is a graphical recording of muscle activity/electrical activity within muscles.
Interpret an EMG graph 1 2 3 1 At which point is the muscle undergoing the greatest strength of contraction?
Learning Target: Explain the effects of fatigue on muscle action. (skill)
Truth or Bologna Katie ran a half marathon. When she finished she could barley walk. T/B Katie could barley walk because her muscle cells were low on ATP, which is also known as fatigue.
Learning Target: Investigate the effect of exercise on grip strength. (skill) The following are national grip strength norms for 16 to 19 year olds. Gender Excellent Good Average Fair Poor Male >56 51-56 45-50 39-44 <39 Female >36 31-36 25-30 19-24 <19 Who has a grip strength that is excellent? Todd- 52 Sue- 37 Sue- Her score is excellent. Todd’s score is good.