Stack #2652864 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
Normal Size Small Size show me how
Question | Answer |
Muscle cells | Muscle fibers |
M line | A dark band that anchors the myosin in the center of the sarcomere |
H zone | Light area in the center of sarcomeres |
A band | Extends the length of the myosin |
I band | Consists of actin |
The arrangement of actin and myosin give a _______ appearance. | Banded |
Basic structural and functional unit of a muscle | Sarcomeres |
Sarcomeres | Joined end to end to form the myofibril |
Myosin myofilaments | Thick myofilaments |
Actin myofilaments | Thin myofilaments |
Myofilaments consist of two major kinds of protein fibers | Actin Myosin |
Minute | Small |
Resting membrane potential | The charge difference across the membrane |
Action potential | The brief reversal back of the charge |
Motor neurons | Nerve cells that carry action potentials to skeletal muscle fibers |
Muscles are named according to their ___, ____, ____, ____, ____, ____, and _____ | Location Size Orientation of fibers Shape Origin Insertion Function |
Antagonists | Muscles that work in opposition to one another |
Synergists | Muscles that work together to accomplish specific movements |
Belly | The portion of the muscle between the origin and the insertion |
Prime mover | One muscle playsa major role in accomplishing he desired movement |
Occipitofromtalis | Raises the eyebrow |
Orbicularis oculi | Closes the eyelids and causes wrinkles |
Orbicularis oris | Pickers the lip |
Buccinator | Flattens the cheeks |
Zygomaticus | Smiling muscle |
Lavator labii superioris | Sneering |
Depressor anguli oris | Frowning |
Mastication | Chewing |
4 pairs of mastication muscles | Two pairs of ptertgoids temporalis Masseter |
Intrinsic tongue muscles | Change the shape of the tongue |
Extrinsic toungue muscles | Move the tongue |
Sternocleidomastoid | Lateral neck muscle and prime mover |
Neuromuscular junction | Each branch that connects to the muscle |
Insertion | The end of the muscle undergoing the greatest movement |
Origin | The most stationary end of the muscle |
The points of attachment of each muscle are it’s ____ and _____ | Origin Insertion |
Slow twitch fibers | Contract more slowly and are more resistant to fatigue |
Fast twitch fibers | Contract quickly and fatigue quickly |
Muscle tone | Constant tension produced by the muscle is constant during contraction |
Isotonic | The amount of tension produced by the muscle is constant during contraction, but the length of the muscle changes |
Isometric | The length of the muscle doesn’t change, but the amount of tension increases during the contraction process |
2 types of muscle contractions | Isometric Isotonic |
Muscle fatigue | Results when ATP is used during muscle contraction faster than it can be produced in the muscle cells |
Oxygen debt | The amount of oxygen needs in chemical reactions to convert lactic acid to glucose |
Aerobic respiration | With oxygen |
Anaerobic respiration | Without oxygen |
Creating phosphate | Another high energy molecule |
ATP | Short lived and unstable |
Recruitment | The increase in number of motor units being activated |
Tetany | The muscle remains contracted without relaxing |
Relaxation phase | The time during which the muscle relaxes |
Contraction phase | Time of contraction |
Lag phase | Time between application of stimulus to a motor neuron and the beginning of a contraction |
All or none response | When threshold is reached |
Threshold | The point where muscle fibers contract maximallly |
Muscle twitch | A contraction of an entire muscle in response to a stimulus |
Sliding filament mechanism | The sliding of actin past myosin during contraction |
Acetylcholinesterase | Enzymes that rapidly break down neuron and muscle cells |
Acetylcholine | A neurotransmitter |
Synaptic vesicles | Secretes neurotransmitter called acetylcholine |
Postsynaptic terminal | Muscle fiber |
Synaptic cleft | The presynaptic terminal and the muscle cell |
Prestnaptic terminal | Enlarged nerve terminal |
Motor unit | A single motor neuron |
Myofibrils | A threadlike structure that extends from one end of the fiber to the other |
Endonysium | Surround the muscle fiber |
Muscle fibers | Single muscle cell |
Fasciculi | Bundles of muscle |
Fascia | Surrounds and separate muscles |
Epimysuim | Connective tissue that surround entire muscle |
Epi | Upon |
Elasticity | Absolute to recoil |
Extensibility | The ability to be stretched |
Excitability | The capacity of skeletal muscle to respond to a stimulus |
Contractility | The ability of skeletal muscle to shorten with force |
Created by:
Blaze24
Popular Science sets