Term
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Definition
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Term
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Definition
| cell membrane of a muscle fiber |
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Definition
| cytoplasm of a muscle fiber |
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Definition
| endoplasmic reticulum of a muscle fiber |
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Definition
| causes heart to beat and pump blood. involuntary. 1 cell nuclei. branched. |
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Definition
| gap junctions that allow coordination of the heartbeat |
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Definition
| moves food through body; controls blood pressure |
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Term
| Where is smooth muscle located? |
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Definition
| walls of hollow organs and blood vessels |
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Definition
| allows movement; facial expression; threadlike; voluntary |
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Definition
| a thin layer of connective tissue that covers each individual muscle fiber |
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Definition
| a bundle of muscle fibers |
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Definition
| the layer of connective tissue that surrounds a muscle fascicle and holds it together |
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Term
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Definition
| tough layer of connective tissue that covers the outside of a muscle |
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Term
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Definition
| a delicate, web-like layer of connective tissue that surrounds each muscle and loosely connects it to other muscles |
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Term
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Definition
| a cord-like extension of the epimysium that binds muscle to bone |
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Term
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Definition
| broad, flat sheets of epimysium that connect muscles to bones or to other muscles |
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Term
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Definition
| thin organelles that fills each muscle fiber |
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Definition
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| Sarcomeres have the ability to make themselves... |
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Definition
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Definition
| when large numbers of muscle fibers shorten at the same time, the entire muscle gets shorter |
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Definition
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Definition
| a thick myofilament with arm-like "heads" |
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Definition
| membrane at each end of the sarcomere that separates the sarcomeres from each other like the lids on a can |
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Term
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Definition
| the ability of a cell to receive and respond to a stimulus |
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Definition
| the ability to shorten when adequate stimulus is received |
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Term
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Definition
| nerves that stimulate skeletal muscles |
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Term
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Definition
| one motor neuron and the muscle fibers it stimulates |
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Term
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Definition
| the long, threadlike extension that carries a nerve impulse from a motor neuron out to a muscle fiber |
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Term
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Definition
| process of an axon where it comes in contact with a muscle fiber |
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Term
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Definition
| the connection between an axon terminal and the sarcolemma of a muscle fiber |
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Term
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Definition
| the depressed, folded area of sarcolemma that an axon terminal fits down into |
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Term
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Definition
| small gap between the axon terminal and motor end plate |
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Term
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Definition
| any chemical released by nerve cells that has the ability to stimulate other cells or nerves |
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Term
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Definition
| the specific neurotransmitter that stimulates skeletal muscle cells |
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Term
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Definition
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Term
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Definition
| the binding of ACh to the motor end plate receptors causes a change in the electrical charge across the sarcolemma |
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Term
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Definition
| an electrical current that depolarization of the sarcolemma generates |
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Definition
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Definition
| a muscle's attachment to an immovable or less movable bone. |
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Definition
| a muscle's attachment to a movable bone. |
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Term
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Definition
| the muscle with the major responsibility for causing a particular movement |
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Term
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Definition
| the muscles that oppose or reverse a movement by the prime mover |
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Term
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Definition
| muscles that help the prime mover- they may make the same movement or reduce undesirable movements |
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Term
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Definition
| specialized synergists; they stabilize the origin of the prime mover so that all tension is used to move the insertion |
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Term
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Definition
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Definition
| when a muscle is in a sustained contraction |
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Term
| three sources for ATP regeneration |
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Definition
| creatine phosphate; aerobic respiration; anaerobic glycolysis |
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Term
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Definition
| the muscle shortens and movement occurs |
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Term
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Definition
| the muscle contracts, muscle tension increases, but the muscle does not shorten |
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Term
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Definition
| projections that are able to link to actin filaments |
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Term
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Definition
| acetylcholine is released into the neuromuscular junction by the axonal terminal |
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Term
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Definition
| acetylcholine diffuses across the neuromuscular junction and binds to receptors on the sarcolemma |
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Term
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Definition
| depolarization occurs, and the action potential is generated |
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Term
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Definition
| the action potential, carried deep into the cell, causes the sarcoplasmic reticulum to release calcium ions |
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Term
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Definition
| the calcium ion concentration at the myofilaments increases, the myofilaments slide past one another and the cell shortens |
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Term
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Definition
| as calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the myofilaments decreases |
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Term
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Definition
| the muscle cell relaxes and lengthens |
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