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chapter 6 anatomy
| Question | Answer |
|---|---|
| Skeletal muscle | Attached to bones |
| Cardiac muscle | Walls of the heart |
| Smooth muscle | Mostly in the hollow visceral organs |
| Deep to the dermis | Hypodermis |
| Epidermis | Outer layer |
| Nerve fiber | Axon |
| Irritability | Ability to receive and responds to stimulus |
| Anerobic | Without oxygen |
| Aerobic | With oxygen |
| Aerobic or endurance | Jogging biking . Result in strong result of more flexible muscles . More resistance to fatigue |
| Contractility | The ability of skeletal muscle shortens force |
| Excitability | The capacity of skeletal muscle to respond to a stimulus |
| Extensibility | The ability to be stretched |
| Elasticity | Ability to recoil to the original resting length after they have been stretched |
| Epimysium | Connective tissue Sheath that surrounds the skeletal muscle |
| Fascia | Connective tissue located outside the Epimysium |
| Perimysium | Loose connective tissue that surrounds |
| Muscle cells | Muscle fibers |
| Myofibrils | Threadlike structure that extends from one end of the Farber to another |
| Actin myofilaments | Thin |
| Myosin myofilaments | Thick |
| Actin and myosin myofilaments form highly ordered units | Sarcomeres |
| Motor nuerons | Nerve cells that carry action potential to skeletal muscle fibers |
| Nueromuscular junction | Synapse |
| Neurotransmitter | Acetylcholine |
| Muscle fiber | Postsynaptic terminal |
| Muscle cell | Synaptic cleft |
| The brief reversal back of the charge is called | Action potential |
| The charge difference across the membrane is called | Resting membrane potential |
| Muscle twitch | The contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers |
| Phenomenon | All or none response |
| A muscle fiber will not respond to stimulus until that stimulus reaches a level called | threshhold |
| Lag phase | The beginning of a contraction |
| Contraction phase | The time of the contraction |
| Relaxation phase | The time that the muscle relaxes |
| Tetany | Where the muscle reminds contracted without relaxing |
| The increase in number of motor units being activated is called | recriutment |
| ATP | Is needed for energy for muscle contraction |
| ATP | Is produced in the mitochondria |
| ATP | Is short-lived and unstable |
| Aerobic | With O |
| Anaerobic | Without O |
| Muscle fatigue | Get tired |
| Isometric | Tension changes length same |
| Isotonic | Tension same length changes |
| Muscle tone | Constant tension |
| Fast twitch | Light meant |
| Slow twitch | Dark meat |
| Oxygen debt | Trying to get o back |
| Orgin | Head |
| Insertion | End |
| Belly | Between insertion and head |
| Muscles that work together | Synergist |
| Muscles that work against each other | Antagonists |
| Plays a major role | Prime moverv |
| Gluteus Maximus | Buttocks |
| Flexor carpi | Flexes the wrist |
| Extensor carpi | Extends the wrist |
| Extensor digitorum | Extends the fingers |
| Flexor digitorum | Flexes the fingers |
| Retinaculum | Bracelet |
| Tricep | Extends 4 arm |
| Biceps | Flex the forarn |
| Brachialis | Flexes 4 arm |
| Trapezius | Rotates scapula |
| Sereatus | Pulls scapula |
| Mastication | Chewing |
| Sternocliedomastoid | Neck |
| Intrinsic | Change shape |
| Extrinsic | Move tongue |
| Zygomaticus | Smiling |
| Buccinator | Flattens checks |
| Occipitofrontalis | Raises the eyebrows |
| Orbicularis oculi | Closes eyelids |
| Orbicularis oris | Puckers the lips |
Created by:
ben.romans
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