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Bio 340-Ashley > Muscle > Flashcards

Flashcards in Muscle Deck (15):
0

A contractile protein that is a part of thin filaments in muscle fibers.

Actin

1

A neurotransmitter 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.

Acetylcholine (ACh)

2

The ability of cells or karts of cells to actively generate force to undergo shortening for movements. Muscle fibers (cells) exhibit a high degree of it.

Contractility

3

The ability of tissue to return to its original state after contraction or extension.

Elasticity

4

The ability of muscle tissue to stretch when it is pulled.

Extensibility

5

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

Motor End Plate

6

A motor neuron together with the muscle fibers/cells it stimulates.

Motor Unit

7

The oxygen-binding, iron containing protein present in the sarcoplasm of muscle fibers (cells); contributes the red color to muscles.

Myoglobin

8

The contractile protein that makes up the thick filament of muscle fibers.

Myosin

9

The cell membrane of a muscle fiber (cell), especially of a skeletal muscle fiber.

Sarcolemma

10

A contractile unit in a striated muscle fiber (cell) extending from one Z disk to the next Z disk.

Sarcomeres

11

The cytoplasm of a muscle fiber (cell).

Sarcoplasm

12

A network of saccule sand tubes surrounding myofibrils of a muscle fiber (cell), comparable to endoplasmic reticulum; functions to store/absorb calcium ions during relaxation and to release them during contraction.

Sarcoplasmic Reticulum

13

Invagination of the epimysium that divides muscles into bundles.

Perimysium

14

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

Tendon