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Anatomy Muscles
Question | Answer |
---|---|
Shortens with Force | Contractility |
Arm Muscle | Bicep |
Respond to stimulus | Excitability |
the ability to be stretched | Extensibility |
The ability to recoil to it's original length after stretched | Elasticity |
What connective tissue sheath surrounds fibers | Endomysium |
The cyto plasm of each fiber is filled with _____. | Myofibrils |
Sarcomere extends from __ line to __ line. | z,z |
When the muscle remains contracted without relaxing | Tetany |
Raises the eyebrows | Occipitofrontalis |
Dome shaped muscle; aids in breathing | Diaphragm |
Lateral neck muscle and prime mover | Sternocleidomastoid |
Another word for chewing | Mastication |
Sheetlike muscle that covers the anterolateral neck | Platysma |
Group of muscles on each side of the back | Erector Spinae |
Muscles that move the thorax | Thoracic Muscles |
Smiling Muscle | Zygomaticus |
Rotates scapula | Trapezius |
Attaches humerus to scapula and clavicle | Deltoid |
Flexes the wrist | Flexor Carpi |
Buttocks | Gluteus Maximus |
Extends the leg | Quadriceps Femoris |
Tailors Muscle (Longest Muscle) | Sartorius |
Posterior thigh muscles | Hamstring |
Adducts and flexes the arm | Pectoralis Major |
Extends the wrist | Extensor Carpi |
Flexes the fingers | Flexor Digitorum |
Extends the fingers | Extensor Digitorum |
Puckers the lips | Orbicularis Oris |
A single motor neuron and all skeletal fibers | Motor Unit |
A contraction of an entire muscle in response to stimuli | Muscle Twitch |
Time between application of stimulus to a motor neuron and beginning of contraction | Lag Phase |
Increase in number of motor units being activated | Recruitment |
Time of contraction | Contraction Phase |
What is the short form of Adenosine Triphosphate | ATP |
What is the darker central region in each sarcomere? | A band |
What is the light area in the center of each sarcomere? | H zone |
Muscles that work together to accomplish specific movements | Synergists |
Muscles that work in opposition to one another are called _____ | Antagonists |
The one muscle that plays the major role in accomplishing movement | Prime Mover |
Elevates the ribs during inspiration | External Intercostals |
Contract during forced expiration | Internal Intercostals |
Flattens the cheeks | Buccinator |
Muscle that allows you to frown | Depressor anguli oris |
Change Shape of Tongue | Intrinsic Tongue Muscles |
Move the Tongue | Extrinsic Tongue Muscles |
The tendinous area of the abdominal wall | Linea Alba |
What are the 4 pairs of mastication muscles | 2 pair of pterygoids, temporalis, and masseter |
What muscle allows you to sneer | Levator Labii Superioris |
Medially rotates, adducts, and powerfully extends the arm | Latissimus Dorsi |
Strong band of fibrous connective tissue that cover the flexor | Retinaculum |
How many muscles comprise the intrinsic hand muscles | 19 |
How many muscles are located within the foot | 20 |
These two form the calf muscle | Gastrocnemius and soleus |
What are the lateral muscles of the leg called | Peroneus Muscles |
True or False: The Gastrocnemius is in the stomach | False |
A muscle fiber will not respond to stimulus until it reaches a certain level called _________. | Threshold |
What is ADP | Adenosine diphosphate |
How many types of muscle contractions are there | 2 |
What is it called when the length of the muscles don't chant but the tension increases | Isometric |
What is it called when the amount of tension is constant but the length changes | Isotonic |
The Head | Origin |
The end of the muscle undergoing the greatest movement | insertion |
The portion of the muscle between the origin and the insertion | belly |
True or false: Some muscles have multiple origins or head | True |
Without oxygen | Anaerobic Respiration |
With oxygen | Aerobic Respiration |
Refers to the constant tension produced by muscles of the body for long periods of time | Muscle tone |
Muscle is connected to the bone by _______. | tendons |
When at rest muscles can store a high energy molecule called ________. | Creatine |
True or False: the Sartorius is a long arm muscle | False, it is a long leg muscle |
The enlarged nerve terminal is the ___________________ | Presynaptic terminal |
The space between the terminal and the muscle cell is the ______________ | Synaptic cleft |
Each presynaptic terminal contains __________ | Synaptic vesicles |
Synaptic vesicles secrete a neurotransmitter called __________ | Acetylcholine |