Ch 15 Muscle Phys. Word Scramble

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Question	Answer
Muscle Fiber	A muscle cell.
Sarcolemma	Plasma membrane of a muscle fiber.
T Tubules	Extensions of sarcolemma that penetrate deep into the muscle fiber enable action potential to penetrate interior of muscle cell.
Nuclei	Many nuclei located below sarcolemma of one muscle cell.
Sarcoplasm	The cytoplasm of a muscle fiber.
Sarcoplasmic Reticulum	Endoplasmic reticulum of muscle; stores Calcium.
Terminal Cisternae	Enlarged end regions of sarcoplasmic reticulum.
Triad	One T tubule with terminal cisternae on each side.
Myofibrils	Bundles of myofilaments surrounded by T tubules and sarcoplasmic reticulum.
Myofilaments	Protein fibers involved in muscle contraction.
Actin	Thin filament in muscle contraction.
Tropomyosin	Covers actin binding sites so myosin heads cannot bind.
Troponin	Binds calcium during muscle contraction and pulls tropomyosin off acting filaments so myosin heads can bind to actin.
Myosin	Thick filament in muscle contractions.
Myosin Heads	Bind to actin.
Sarcomere	Contractile units of muscle.
Z Line	Anchors the acting filaments.
M Line	Anchors the myosin filaments.
A Band	Dark band where myosin filaments are located; in center of sarcomere.
I Band	Light band where only actin filaments are located; at the ends of sarcomere.
Neuromuscular Junction	Site where somatic motor neuron connects a skeletal muscle fiber, located only on skeletal muscle fibers.
Motor End Plate	Specific region where synaptic terminal of a motor neuron synapses with one muscle fiber.
Motor Unit	All the muscle fibers innervated by one motor neuron.
Epimysium	Surrounds entire muscle.
Perimysium	Surrounds Fascicles (bundles of muscle fibers)
Endomysium	Surrounds individual muscle fibers.

Created by: Paiger89

Popular Biology sets

Genetics: Monohybrid, Dihybrid, & Non-Mendelian

Unit 2- Requirements of Life

Evidence of Evolution