Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Eastham
Muscle's
| Question | Answer |
|---|---|
| Contractility | shorten muscle with force |
| Excitability | muscle response to stimulus |
| Extensibility | muscle stretch |
| elasticity | muscle recoils in original position |
| epimysium | a tissue sheath that surrounds skeletal muscle |
| fascia | it surrounds and seperates muscles |
| perimysium | loose connective tissue surrounding muscle fasciculi |
| fibers | single muscle cells |
| myofibrils | threadlike structure that extends from one end of the fiber to the other |
| actin myofilaments | thin |
| myosin myofilaments | thick |
| sarcomeres | actin and myosin myofilaments form units |
| z line | attachment site for actin |
| I band | a light area that consists of actin |
| A band | extends the length of myosin |
| H zone | center of sacromere consisting of only myosin |
| M line | anchor point for myosin myofilaments |
| resting membrane potential | the charge diff across the membrane |
| action potential | a brief reversal back of the charge |
| motor nuerons | they carry action potentials to skeletal muscle fibers |
| synapse | axon branch that connects to the muscle |
| motor unit | motor neuron and all the skeletal muscle fibers it innervates |
| presynaptic terminal, | the enlarged nerve terminal |
| synaptic cleft | the space between the presynaptic terminal and the muscle cell |
| acetylcholine | a terminal that secretes neurotransmitter |
| muscle twitch | contraction of entire muscle |
| threshold | a level where muscle fiber contract maximally |
| lag phase | time of a stimulus to a motor nueron and the beginning of a contraction |
| contraction phase | time of contraction |
| relaxation phase | when the muscle relaxes |
| tetany | when a muscle stays contracted |
| recruitment | more motor units being activates |
| ATP | energy for muscle contraction |
| creatine phosphate | high energy molecule |
| anaerobic respiration | without oxygen |
| aerobic respiration | with oxygen |
| oxygen debt | oxygen needed in chemical reactions to convert lactic acid to glucose |
| muscle fatigue | ATP is used during muscle contraction faster than it can be produced in the muscle cells |
| isometric | equal distance |
| isotonic | equal tension |
| muscle tone | constant tension for long periods of time |
| fast twitch fibers | contact and fatigue quickly |
| slow twitch fibers | contracts slow and more resistant |
| origin | station end of the muscle |
| insertion | where a muscle undergoes the greatest movements |
| belly | between the origin and insertion |
| synergists | muscle doing a certain movement |
| antagonists | works in oppositiong |
| prime mover | when a muscle plays a major role |
Created by:
cuzray
Popular Anatomy sets