Ch10 Flashcards

0
Q

A connective tissue partition that separates adjacent fasciculi in a skeletal muscle.

A

Perimysium

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1
Q

A dense layer of collagen fibers that surrounds a skeletal muscle and is continuous with the tendons/aponeuroses of the muscle and with the perimysium.

A

Epimysium

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2
Q

A small bundle; usually refers to a collection of nerve axons or muscle fibers.

A

Fascicle

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3
Q

A delicate network of connective tissue fibers that surrounds individual muscle cells.

A

Endomysium

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4
Q

Byronic stem cells that function in the repair of damaged muscle tissue

A

Myosatellite Cells

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5
Q

A collagenous band that connects a skeletal muscle to an element of the skeleton.

A

Tendon

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6
Q

A broad tendinous sheet that may serve as the origin or insertion of a skeletal muscle.

A

Aponeurosis

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7
Q

The plasma membrane of a muscle cell.

A

Sarcolemma

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8
Q

The cytoplasm of a muscle cell.

A

Sarcoplasm

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9
Q

The transverse, tubular extensions of the sarcolemma that extend deep into the sarcoplasm, contacting cisternae of the sarcoplasmic reticulum.

A

Transverse tubules

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10
Q

Organized collections of myofilaaments in skeletal and cardiac muscle cells.

A

myofibrils

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11
Q

A cytoskeletal filament in a skeletal or cardiac muscle cell; consists of actin, troponin, and tropomyosin.

A

Thin filaments

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12
Q

A cytoskeletal filament in a skeletal or cardiac muscle cell; composed of myosin with a core of titin.

A

Thick filament

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13
Q

A myosin head that projects from the surface of a thick filament and that can bind to an active site of a thin filament in the presence of calcium ions.

A

Cross bridge

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14
Q

A synapse between a neuron and a muscle cell.

A

Neuromuscular junction

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15
Q

A single stimulus contraction relaxation cycle in a skeletal muscle.

A

Twitch

16
Q

If tension rises in stages like the steps in a staircase; if a skeletal muscle is stimulated a second time immediately after the relaxation phase has ended, the resulting contraction will develop a slightly higer maximum tension.

A

Treppe

17
Q

Occurs when higher stimulant frequency eliminates the relaxation phase

A

Complete tetanus

18
Q

the muscle as a whole does not change length and the tension produces never exceeds the load

A

isometric contractions

19
Q

tension rises and the skeleton muscles length changes

A

isotonic contraction

20
Q

The smallest contractile unit of a striated muscle cell.

A

Sarcomeres

21
Q

A propagated change in the transmembrane potential of excitable cells, initiated by a change in the membrane permeability to sodium ions.

A

Action Potential

22
Q

A narrow space, separates the synaptic terminal of the neuron from the opposing sarcolemmal surface.

A

Synaptic Cleft

23
Q

A chemical neurotransmitter in the brain and peripheral nervous system.

A

Acetylcholine

24
Q

A high-energy compound in muscle cells; during muscle activity, the phosphate group is donate to ADP, regenerating ATP.

A

Creatine Phosphate

25
Q

The complete breakdown of organic substrates into carbon dioxide and water, via pyruvic acid; a process that yields large amounts of ATP but requires mitochondria and oxygen.

A

Aerobic Metabolsim

26
Q

Without oxygen; The anaerobic cytoplasmic breakdown of glucose into lactic acid by way of pyruvic acid, with a net gain of two ATP molecules.

A

Anaerobic Process/Glycolysis

27
Q

A compound produced from pyruvic acid under anaerobic conditions.

A

Lactic Acid

28
Q

The conditions in muscle fibers are returned to normal, preexertion levels.

A

Recovery Period

29
Q

The amount of oxygen required to restore normal, preexertion conditions.

A

Oxygen Debt

30
Q

Also called cardiocytes or cardiac myocytes, are found only in the heart.

A

Cardiac Muscle Cells

31
Q

Regions where adjacent cardiocytes interlock and where gap junctions permit electrical coupling between the cells.

A

Intercalated discs

32
Q

Muscle tissue in the walls of manny visceral organs; characterized as nonstriated, involuntary muscle.

A

Smooth Muscle tissue

33
Q

Muscle tissue within the heart. contracts without neural stimulation.

A

Cardiac Muscle Tissue