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Flashcards in Chapter 10 Muscular Tissue Deck (41)
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1

Decteased or lost muscle tone in which muscles appear flaccid. 

Hypotonia

2

Invagination of the epimysium that divides muscles into bundles

erimysium

3

Inability of a muscle to maintain its strength of contraction or tension; may be related to insufficient oxygen, depletion of glycogen, and/or lactic acid buildup

Muscle fatigue

4

a continuous sheet of areolar connective tissue and adipose tissue between the dermis of the skin and the deep fascia of the muscles. Also called the hypodermis. 

Subcutaneous layer

5

Hypertonia characterized by increased muscle tone, increased tendon reflexes, and pathological reflexes (Babinski sign)

Spasticity

6

The study of muscles

Myology

7

A white fibrous cord of dense regular connective tissue that attaches muscle to bone. 

Tendon

8

The ability to return to its original shape after contraction oor extension

Elasticity

9

A sudden, involuntary contraction of large groups of muscles

Spasm

10

Invagination of the perimysium separating each individual muscle fiber (cell)

Endomysium

11

The cutaneous area developed from one embryonic spinal cord segment and receirving most of it's sensory innervation from one spinal nerve. An instrument for incising the skin or cutting thin transplants of skin. 

Dermatome

12

Rhythmic, involuntary, purposeless contraction of opposing muscle groups. 

Tremor

13

Aneurotransmitter liberated by many peripheral nervous system neurons and some central nervous system neurons. It is excitatory at neuromuscular junctions but inhibitory at some other synapses (for example, it slows heart rate). 

Acetylcholine

14

the middle primary germ latyer the gives rise to conective tissues, blood and blood vessels, and muscles. 

Mesoderm 

15

The record or tracing produced by myograph, an apparatus that measures and records the force of muscular contractions. 

Myogram

16

The abilit of cells or parts of cells to actively generate force to undergo shortening for movements. Muscle fibers (cells) exhibit a high degree of contractility 

Contractility

17

Increased muscle tone that is expressed as spasticity or ridigity. 

Hypertonia 

18

The ability of muscle tissue to stretch when it is pulled

Extensibility

19

Hypertonia characterized by increased muscle tone, but reflexes are not affected. 

Rigidity

20

A sustained, partial contraction of portions of skeletal or smooth muscle in response to activiation of stretch receptors or a basline level of action potentials in the innervating motor neurons. 

Muscle tone

21

Region of the sarcolemma of a muscle fiber (cell) that includes acetylcholine (ACh) receptors, which bind ACh released by synaptic end bulbs of somatic motor neurons. 

Motor end plate

22

A motor neuron together with the muscle fibers (cells) it stimulates 

Motor Unit

23

Any abnormal condition or dissease of muscle tissue

Myopathy

24

Abnormal, spontaneous twitch of a skeletal muscle fibers in one motor unit that is visibele at the skin surface; not associated with movement of the affected muscle; present in progressive diseases of motor neurons, for example poliomyelitis. 

Fasciculation 

25

State of partial contraction of muscles after death due to lack of ATP; myaosin heads (crossbridges) remain attached to actin, thus preventing relaxation. 

Rigor mortis 

26

Fibrous connective tissues around muscles.

Epimysium

27

A group of muscles innervated by the motor neurons of a single spinal segment. In an ambryo, the portion of a somite that  develops into some skeleteal muscles 

Myotome

28

An excessive enlargement or overgrowth of tissue with cell division. 

Hypertrophy

29

A network of saccules and tubes surrounding myofibrilis of muscle fiber (cell), comparable to endoplasmic reticulum; functions to reabsorb calcium ions during relaxtion and releae them to cause contraction. 

Sarcoplasmic reticulum

30

 A complex of three units of muscle fiber composed of a transvers tubule and the sarcoplasmic reticulum terminal cisterns on both sides of it

Triad