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THIS IS With Your Host... Micro anatomy Macro anatomy Function Human muscles arms/legs Human muscles head/trunk Muscle types 100 100 100 100 100 100 200 200 200 200 200 200 300 300 300 300 300 300 400 400 400 400 400 400 500 500 500 500 500 500 Contractile units aligned end-toend along the length of myofibrils (areas between Z lines). A 100 What are sarcomeres? A 100 A protein that composes the thick filaments of a sarcomere. A 200 What is myosin? A 200 Three proteins found in the thin filaments of sarcomeres. A 300 What are actin, troponin, & tropomyosin? A 300 The interconnecting tubules and sacs of this surround each myofibril and store calcium for release on demand when the muscle fiber is stimulated. A 400 What is sarcoplasmic reticulum? A 400 Fingerlike extensions of this structure called T-tubules go deep into the muscle fiber and are in close contact with the sarcoplasmic reticulum. A 500 What is sarcolemma? A 500 Connective tissue covering surrounding individual muscle fibers. B 100 What is endomysium? B 100 A bundle of muscle fibers surrounded by perimysium. B 200 What is a fascicle? B 200 Strong, cordlike structures connected to bone that blend into the epimysium covering whole muscle. B 300 What are tendons? B 300 Bundles of fascicles surrounded by epimysium. B 400 What is a muscle? B 400 A term used in muscle names to indicate the fibers run vertically. B 500 What is “rectus” ? B 500 Muscles produce movement, maintain posture, stabilize joints, and generate _______. C 100 What is heat? C 100 Where the axon of a neuron and the sarcolemma come in close contact. C 200 What is neuromuscular junction? C 200 When an electrical nerve impulse reaches the axon terminal, it is converted to this chemical neurotransmitter which crosses the synaptic cleft and attaches to receptors on the sarcolemma. C 300 What is acetylcholine (Ach)? C 300 DAILY Place A Wager DOUBLE C 400 ACh causes an imbalance of ions on the inside and outside of the sarcolemma, which begins this electrical disturbance that travels the entire sarcolemma. C 400 What is an action potential? C 400 The action potential traveling down the sarcolemma stimulates the release of this from the sarcoplasmic reticulum. C 500 What is/are calcium ions, Ca+? C 500 An antagonist to the biceps brachii. D 100 What is the triceps brachii? D 100 The prime mover for flexing the thigh and for extending the lower leg D 200 What is rectus femoris? D 200 Types of muscles that stabilize joints. D 300 What are fixators? D 300 Muscle that originates on the scapula and clavicle, inserts on the humerus, and raises (abducts) the arm overhead. D 400 What is the deltoid? D 400 This bulky muscle originates on the distal end of the femur, lies dorsal to the tibia, and inserts on the calcaneus. D 500 What is the gastrocnemius? D 500 Muscle that originates on the pubis, inserts on the sternum and ribs, and is commonly known as a “six pack” E 100 What is the rectus abdominus? E 100 Diamond shaped muscle on the back and neck that extends the neck and elevates, depresses, & adducts the scapula. E 200 What is the trapezius? E 200 Muscle that has circular fibers and is often called the “kissing” muscle. E 300 What is the orbicularis oris E 300 Muscle that originates on the sternum & clavicle and inserts on the mastoid process of the temporal bone. E 400 What is the sternocleidomastoid? E 400 Muscle that adducts and flexes (moves in front of you) the humerus. E 500 What is the pectoralis major? E 500 Voluntary muscles that show striations, found on bones. F 100 What are striated/skeletal muscles? F 100 Muscle that is striated but involuntary. Located only in the heart. F 200 What is cardiac muscle? F 200 Smooth muscle is involuntary, not striated, and can be found mainly in the walls of these. F 300 What are hollow visceral organs such as stomach, intestines, & bladder? F 300 This type of muscle has multiple nuclei in each cell (fiber). F 400 What is striated/skeletal muscle? F 400 This type of muscle has intercalated discs joining branched cells (fibers). F 500 What is cardiac muscle? F 500 The Final Jeopardy Category is: Muscle function Please record your wager. Click on screen to begin This provides the energy to release and recock each myosin head so it can attach to the next actin binding site and repeat again and again, causing the thick and thin filaments to slide past each other and the sarcomere to shorten in length. Click on screen to continue ATP Click on screen to continue Thank You for Playing Jeopardy! Game Designed By C. Harr-MAIT