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Definition
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Term
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Definition
| the contracile unit between two discs |
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Definition
| composed of thick filaments |
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Term
| myofible, fibercells, myofilament, sarcomere, facile from largest to smallest |
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Definition
1.fascile
2. fibercell
3.myofible
4. sarcomere
5.myofilament |
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Term
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Definition
| expose myosin binding sites on actin |
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Term
| Mechanical force of contraction |
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Definition
| sliding of thin filaments past thinck ones |
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Term
| Axon terminals of the motor neuron |
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Definition
| release neurotransmitters |
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Term
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Definition
| myosin cross bridges attach to active sites of |
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Term
| CP functions with in the muscle cell |
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Definition
| by storing energy that will go from ADP to ATB |
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Term
| Anerobic glycolysis occurs with out |
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Definition
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Term
| Anerobic glycolysis and lactic acid |
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Definition
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Definition
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Definition
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Definition
| located on the ventral side of the body |
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Definition
| not responsible for flexion or extension of the arm |
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Term
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Definition
| a contraction in which a skeletal muscle does not shorten but its tension increases |
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Definition
| a smooth, sustained contraction |
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Term
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Definition
| the gap between the motor neuron and the muscle fiber it supplies at the neuromuscular junction |
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Definition
| the area between two intercalated disk |
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Definition
| composed of myosin protein |
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Definition
| insufficient intracellular quantites of ATP due to excessive consuption |
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Term
| What is the effect of aging on skeletal muscles? |
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Definition
| With aging, the amount of connective tissue in muscle increases and the amount of skeletal muscle tissue decreases, thus the muscles become stringier (more sinewy). Since skeletal muscle represents a larger portion of body weight, it begins to decline in elderly persons as this normal loss of muscle mass occurs. Another result of the loss in muscle mass is a decrease in muscle strength—strength decreases by about 50% by the age of 80. Regular exercise can help offset the effects of aging on the muscular system, and frail elders who begin to "pump iron" can rebuild muscle mass and significantly increase their functional strength. |
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Term
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Definition
| when muscles shorten and movement occurs due to the sliding of the myofilaments. Flexion and extension of the arm are just two examples of isotonic contractions. |
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Term
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Definition
| one neuron and all of the skeletal muscle cells it stimulates. |
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Term
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Definition
| occurs between the axon terminals of one neuron and the sarcolemma of a skeletal muscle cell |
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Term
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Definition
.actin is anchored at the Z line
. located at the ends of a sarcomere |
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Term
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Definition
| part of the muscle that contracts |
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Definition
| smaller units that make up muscle fibers |
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Definition
| have great endurance and store a lot of oxygen |
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Term
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Definition
| protein filaments that make up myofibrils |
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Term
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Definition
| adapted for strenght and store little oxygen |
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Term
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Definition
| energy for muscles probided by cellular respiration |
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Term
| Steps of Muscle contraction |
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Definition
1. A nerve impulse travels to the muscle
2. calcium is released into the myofibrils
3.Calcium causes Myosin and actin to attach to each other
4. thin filaments are pulled to the center of the sarcome
5. The muscle contracts |
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Term
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Definition
| a delicate connective tissue sheath |
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Definition
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Definition
| composed of protein called actin |
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Definition
| single brief, jerk contractions |
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Term
| resitstance or isometric exercises |
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Definition
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Term
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Definition
| attached to the movable bone and when the muscle contracts, the insertion moves toward the origin |
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Term
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Definition
a movement, generally in the sagittal plane, that decreases the angle of the joint and brings two bones closer togehter
.typical of hinge joints and beding forward at the hip |
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Term
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Definition
opposite of flexion, so it is a movement that increases the ange or the distance, between two bones or parts of the body.
.straightening the knee or elbow |
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Term
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Definition
movement of a bone around its longitudinal axis
.rotation is a common movement of ball and socket jointsw and decribes the movement of the atleas around the dens of the axis |
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Term
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Definition
| moving a limb away from the midline or median plane of the body |
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Term
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Definition
| Adduction is the opposite of abduction, so the movement of a limb toward the body midline |
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Term
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Definition
| a combination of flexion, extension, abduction and adduction commonly seen in ball and socket joints such as the shoulder. the proximal end of the limb is stationary and its distal end moves ina a circle. the lmb as a whole outlines a cone |
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