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
anatomy muscles chap
anatomy
| Term | Definition |
|---|---|
| Contractility | the ability of a skeletal muscle to shorten with force |
| Excitability | the capacity of a skeletal muscle to respond to a stimulus |
| Extensesibility | the ability to be streched |
| Elasticity | the ability to recoil to their original resting length after they have been streched |
| epimysium | each skeletal muscle is surrounded by a connective tissue seath called? |
| Fascia | Another connrctive tissue located outside of the epimysium |
| Muscle Fasciculi (Fascicle) | a muscle id composed of nemerous visible bundles called? |
| Perumysium | Fasciculi (Fascicle) are surrounded by loose connective tissue called/ |
| Fibers | the fasciculi are composed of single muscles cells called? |
| Endomysium | Each fiber is surrounded by a connective tissue seath called? |
| Myofibrils | The cytoplasm of each fiber is filled with? |
| Myofibrils | A thread like structure that extends from one end of the fiber to the other? |
| Actin and Myosin Myofilaments | Myofibrils consist of 2 major kinds of protine fibers: |
| Actin | Resembles 2 minute strands of pearls twisted together |
| Myosin | Resembles bundles of minute golf clubs |
| Sacromeres | Actin adn myosin myofilaments from highly ordered units called? |
| Sacromers | the basic structural and functional unit of the muscles |
| Resting membranes potential | The charge difference across the membrane is called? |
| Action Pontential | When a muscle cell is stimulated the membrane characteristics change briefly, the brief reversal back of the charge is called? |
| motor neurons | Nerve cells that carry action potentials to the skeletal muscles fibers |
| A neuromuscular junction or synapse | Axons enter the muscles and branch, each branch that connects to the muscle forms? |
| A Motor Unit | A single motor neuron and al the skeletal muscle fibers in innervates are called |
| Presynaptic terminal | the enlarged nerve terminal |
| Synaptic Cleft | Space between the presynaptic terminal and the muscle cell: |
| Synaptic vesicles | Each presynaptic terminal contains |
| Acetylcholine | Synaptic vesicles secret a neurotransmitter called? |
| Acetylcholinesterase | The acetylcholine release into the synaptic cleft between the neuron and muscle cell is rapidly broken down by an enzymes |
| Muscke Contraction | Occurs as action and myosin myofilaments slide past one another causing the sarcomers to shorten : |
| Sliding Filament Mechanism | The sliding of action myofilaments past myosin myofilments during contraction is called |
| Muscle Twitch | Contraction of an entire muscle in responce to a stimulus that causes the action potential in one or more muscles fibers: |
| Threshold | A muscle fiber will not respond to a stimulus unit that stimulus reaches a level called? |
| The lag phase | The time between application of a stimulus to a motor neuron and the beginning of a contaction is? |
| Contraction Phase | Time of contraction |
| Muscle Fatigue | Result when ATP is used during muscle contraction faster than it can be produced in the muscle cell |
| Isometic (Equal Distance) | The length of the muscle does nto change, but the amount of tension increses during the contraction process |
| Isometric (Equal Tension) | The amount of tension produced by the muscle id constant during contraction, but the length of the muscle changes : |
| muscle tension | Constant tension produced by muscles of the body for long periods of time |
| Fast-Twitch Fibers (white meat of a chicken brest) | Contract quickly and fatigue quickly |
| Slow-Twitch Fibers (Dark meat of a ducks brest or leg of chicken) | Contract more slowly and are more resistant to fatigue |
| origin | the most stationary end of the muscle |
| insertion | the end of the muscle undergoing the greatest movement |
| Belly | The portion of the muscle between the orgin and the insertion |
| Synergists | Muscles that work together to accomplish specific movements are called? |
| Antagonists | Muscles that work in opposition to one another are called? |
| The Prime Mover | Among a group of synergists, if one muscle plays the major role in accomplishing the desired movement, it is: |
| Occipitofrontales | Rasies eyebrows |
| Orbicularis Oculi | Closes the eyelid |
| Orbiccularis Oris | Puckers the lips |
| Buccinator | Flattens the cheeks |
| Orbicularis oris, buccanator | the two kissing muscles |
| Zygomaticus | Smiling |
| Levator Labii Superioris | Sneering |
| Depressor Anguli Oris | Frowning |
| Mastication | Chewing |
| Masseter, Temporalis, 2 Pterygoids | 4 Pairs of Chewing muscles |
| Extrinsic tougue muscles | moves the tongue |
| Intrinsic tongue muscles | changes shape of the tongue |
| Stero Cleido Mastoid | Rotates and Abducts neck |
| Errector Spinae | Found in each side of the back, respondable for errect posture |
| External intercostals | Contract During Inspiration |
| Internal intercostals | Contract during forced expirations |
| Diaphram | Dome shaped muscle, responcible for quiet breathing |
| Rectus abdominis | Abs |
| Linea Alba | White line of connective tissue that extends from the sternum of the pelvis |
| Tendinous Inscription | Cross the Rextus Abdominis in 3 places and from a segmented look in abs |
| Truck MusclesMuscles that move the verterbral column | Trunk muscles |
| Thorasic Muscles | muscles that move the trunk |
| Abdominal wall muscles | muscles of the anterior abdominal wall flex and rotate the verebral column, compress the abdominal cavity, and hold in the abdominal viscera |
| trapezius | Pulls scapula anteriorly |
| adducts and flexes the arm | Pectoralis major |
| latissimus doris | Medially rotaes adducts, and powerfully extends the arm. "swimmers muscles" |
| frontails | moves the eyebrows |
| Orbicularis oculi | located around the eye (muscle) |
| Masseter | chewing muscles |
| Gluteus maximus | buttocks |
| hamstring | posterior thigh muscles |
Created by:
sarastarkey44
Popular Science sets