Chapter 6 muscles 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 |
The ability of skeletal muscle to shorten with force | Contractility |
The capacity of skeletal muscle to respond to a stimulus | Excitability |
Extensibility | The ability to be stretched |
Ability to recoil to their original resting length after they have been stretched | Elasticity |
Each skeletal muscle is surrounded by a connective tissue sheath called | The epimysium |
______ is another connective tissue located outside the epimysium | Fascia |
The fasciculi are composed of single muscle cells called ______ | Fibers |
Each fiber is surrounded by a connective tissue sheath called the | Perimysium |
A threadlike structure that extends from one end of the fiber to the other | Myofibrils |
Thin myofilaments | Actin myofilaments |
Thick myofilaments | Myosin myofilaments |
Actin and myosin myofilaments form highly ordered units called | Sarcomeres |
What band extends the length of the myosin | The A band |
On each side of the Z line is a light area called | I band |
The change difference across the membrane is called the | Resting membrane potential |
The brief reversal back of the charge is called | Action potential |
Nerve cells that carry action potentials to skeletal muscle fibers | Motor neurons |
Each branch that connects to the muscle forms | Neuromuscular junction |
A single motor neuron and all the skeletal muscle fibers it innervates are called | A motor unit |
The enlarged merger terminal | Presynaptic terminal |
Space between the presynaptic terminal and the muscle cell is the | Synaptic cleft |
Each presynaptic terminal contains | Synaptic vesicles |
A contraction of the entire in response to a stimulus that causes the action potential in on of more muscle | Muscle twitch |
The time between application of a stimulus to a motor neuron and the beginning of a contraction is the | Lag phase |
The time of contraction is the | Contraction phase |
The time during which the muscle relaxes is the | Relaxation phase |
Where the muscle remains contracted without relaxing | Tetany |
The increase in number of motor units being activated is called | Recruitment |
ATP | Adenosine Triphosphate |
ATP | is needed for energy for muscle contraction |
ATP | Is produced in the mitochondria |
ATP | Is short lived and unstable |
Muscles that work together to accomplish specific movements are | Synergists |
Muscles that work in opposition to one another are called | Antagonists |
Most stationary end of the muscle | Origin (head) |
The end of the muscle undergoing the greatest movement | Insertion |
Portion of the muscle between the origin and the insertion is the | Belly |
Some muscles have multiple | Origins or heads |
2 types of muscle contractions | Isometric & isotonic |
Anaerobic respiration | Without oxygen |
Aerobic respiration | With oxygen (more efficient) |
If one muscle plays the major role in accomplishing the desired movement, it is the | Prime mover |
Mastication | Chewing |
4 pairs of mastication muscles | 2 pairs of pterygoids, temporalis, and masseter |
Intrinsic tongue muscles | Change the shape of the tongue |
Extrinsic tongue muscles | Move the tongue |
Sternocleidomastoid | Lateral neck muscle and prime mover |
Platysma | Sheetlike muscle that covers the anterolateral neck |
Occipitofrontalis | Raises the eyebrows |
Orbicularis oculi | Closes the eyelids (causes crows feet) |
Orbicularis oris | Puckers the lips |
Buccinator | Flattens the cheeks |
Zygomaticus | Smiling muscle |
Levator labii superioris | Sneering |
Depressor Anguli oris | Frowning |
Group of muscles on each side of the back | Erector spinae |
External intercostals | Elevate the ribs during inspiration |
Internal intercostals | Contract during forced expiration |
Ok each side of the linea alba is the ______ ________ muscle | Rectus abdominis |
Scapular movements: | Trapezius & serratus anterior |
Trapezius | Rotates scapula |
Serratus anterior | Pulls scapula anteriorly |
Pectoralis major | Adducts and flexes the arm |
Latissimus dorsi | Medially rotates, adducts, & powerfully extends the arm "swimmer muscles" |
Deltoid | Attaches the humerus to the scapula and clavicle |
Triceps brachii | Extends the forearm |
Biceps brachii | Flexes the forearm |
Brachialis | Flexes forearm |
Brachioradialis | Flexes and supinates the forearm |
Flexor carpi | Flexes the wrist |
Extensor carpi | Extends the wrist |
Flexor digitorum | Flexes the fingers |
Extensor digitorum | Extends the fingers |
19 hand muscles | Intrinsic hand muscles |
Gluteus maximus | Buttocks |
Quadriceps femoris | Extends the leg |
Created by:
Tristonagee78
Popular Anatomy sets