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muscle system
| Question | Answer |
|---|---|
| What is the ability of skeletal muscle to shorten with force? | Contractility |
| What is another connective tissue located outside the epimysium? | Fascia |
| What is the ability to be stretched? | Extensibility |
| Each fiber is surrounded by a connective tissue sheath is called the what? | Endomysium |
| What are the 2 major kinds of protein fibers? | Actin and myosin |
| What is the function of the Erector Spinae? | Responsible for keeping the back straight and the body erect. |
| What is the action of the Sternocleidomastoid? | Pull the corners of the mouth inferiorly, producing a downward sag of the mouth. |
| How many pairs of mastication muscles are there? | 4 |
| How many pairs of pterygoids are there? | 2 |
| What do the occipitofrontalis's do? | raise the eyebrows |
| What facial muscle flattens the cheeks? | Buccinator |
| What do the thoracic muscles do? | muscles that move the thorax |
| Which tongue muscle moves the tongue? | Extrinsic tongue muscle |
| What is another phrase for the sartorius? | tailors muscle |
| How many muscles are located in the foot? | 20 |
| How many muscles are located in the hand? | 19 |
| What rotates the scapula? | trapezius |
| What is another word for your bellybutton? | umbilicus |
| What are nerve cells that carry action potentials to skeletal muscle fibers? | motor neurons |
| A single motor neuron and all the skeletal muscle fibers it innervates are called what? | a motor unit |
| A contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers is called? | muscle twitch |
| What is the line between the A bands called? | m-line |
| What is the lateral neck muscle and prime mover? | Sternocleidomastoid |
| What consists of white connective tissue rather than muscle? | linea alba |
| contracts quickly and fatigue quickly | fast twitch fibers |
| contract more slowly and more resistant to fatigue. | slow twitch fibers |
| the head | origin |
| end of the muscle undergoing the greatest movement | insertion |
| portion of the muscle between the origin and the insertion | belly |
| without oxygen | anaerobic respiration |
| with oxygen | aerobic respiration |
| equal distance | isometric |
| equal tension | isotonic |
| the amount of oxygen needed in chemical reactions to convert lactic acid | oxygen debt |
| where the muscle remains contracted without reacting | tetany |
| beginning of a contraction | lag phase |
| What are the facial muscles? | occipitofrontalis, orbicularis oculi, orbicularis oris, buccinator, zygomaticus, levator labii superiioris, depressor anguli oris |
| act of chewing | mastification |
| extends forearm | triceps brachii |
| flexes forearm | biceps brachaii |
| flexes and supinates forearm | Brachioradialis |
| buttocks | gluteus maximus |
| hip muscle and common injection site | gluteus medius |
| extends the leg | quadriceps |
| posterior thigh muscles | hamstring |
| lateral muscles of the leg | peroneus |
| joined at the end to form myofibril | sarcomeres |
| evaluate the ribs during inspiration | external |
| contract during forced expiration | internal |
| accomplishes quiet breathing | diaphragm |
| flexes the wrist | flexor carpi |
| extends the wrist | extensor carpi |
| flexes the fingers | flexor digitorum |
| extends the fingers | extensor digitorum |
| located on your forehead | frontalis |
| back muscle of your arm | tricep |
| front muscle of your arm | bicep |
| shoulder muscle | deltoid |
| muscle cell | muscle fibers |
| ability to recoil back to their original resting length after they have been stretched | elasticity |
| the amount of oxygen needed in chemical reactions to convert lactic acids into glucose and to replenish the depleted stores of creatine phosphate stores in muscle cells | oxygen debt |
| muscles that work in opposition to one another | antagonists |
| muscles that work together to accomplish specific movements | synergists |
| connective tissue sheath | epimysium |
| skeletal muscle surrounded by loose connective tissue | perimysium |
| each fiber is surrounded by a connective tissue sheath | endomysium |
| threadlike structure that extends from one end of the fiber to the other | myofibrils |
| brief reversal back of the charge | action potential |
| near the center of the cell | synapse |
| the charge difference across the membrane | resting membrane potential |
| smiling muscle | zygomaticus |
| sneering | levator labii superioris |
| puckers the lips | orbicularis oris |
| closes eyelids and causes "crows feet" wrinkles in the skin at the lateral corners of the eye | orbicularis oculi |
| muscle on each side of the linea alba | rectus abdominis |
| flex extend, abduct, and adducts the toes | intrinsic foot muscles |
Created by:
brit.hysell
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