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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 |