Anatomy Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The ability of skeletal muscle to shorten with force. | Contractility
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| The ability of skeletal muscle to respond to a stimulus. | Excitability
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| The ability to be stretched. | Extensibility
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| The ability to recoil to their original resting length after they have been stretched. | Elasticity
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| Connective tissue sheath that surrounds each skeletal muscle. | Epimysium
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| Connective tissue located outside the epimysium, surrounds/separates muscles. | Fascia
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| Visible bundles that compose a muscle. | Muscle fasciculi (fascicle)
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| Loose connective tissue that surrounds the fasciculi. | Perimysium
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| Fasciculi are made up of single muscle cells called... | Fibers
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| Each fiber is surrounded by a connective tissue sheath called the | Endomysium
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| The cytoplasm of each fiber is filled with | Myofibrils
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| A threadlike structure that extends from one end of the fiber to the other | Myofibrils
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| 2 major types of protein fibers | Actin myofilaments & myosin myofilaments
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| Actin myofilaments | Thin, resemble two strands of pearls twisted together
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| Myosin myofilaments | Thick, resemble bundles of golf clubs
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| Actin and myosin myofilaments form ordered units which are | Sarcomeres
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| Sarcomeres are joined end to end to form the | Myofibril
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| The basic structural & functional unit of the muscle | Sarcomeres
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| Each sarcomere extends from | One Z line to another Z line
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| Each Z line is an attachment site for | Actin
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| On each side of the Z line is a light area called an | I band
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| I bands consists of | Actin
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| Muscle cells | Muscle fibers
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| Buttocks | Gluteus maximus
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| Chest muscle | Pectoral muscle
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| Anterior thigh muscle | Quadriceps femoris
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| Posterior thigh muscle | Hamstrings
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| Back muscle | Latissimus dorsi
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| Muscle responsible fro smiling | Zygomaticus
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| Muscle responsible for sneering | Levator labii superioris
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| Muscle responsible for frowning | Depressor anguli oris
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| Closes the eyelid | Orbicularis oculi
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| Puckers the mouth | Orbicularis oris
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| Flattens the cheeks | Buccinator
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| The most stationary part of a muscle | Origin
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| The end of the muscle undergoing the greatest movement | Insertion
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| The portion of the muscle between the origin and the insertion | Belly
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| ATP | Needed for energy for muscle contraction
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| ATP is produced in the | Mitochondria
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| ATP is | Short-lived & unstable
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| ATP degenerates to | The more stable ADP, plus phosphate
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| When at rest muscle cells can't stockpile ATP but can store | Creatine phosphate
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| Anaerobic respiration | Without oxygen
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| Aerobic respiration | With oxygen
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| Muscle fatigue results when | ATP is used during the muscle contractions faster than it can be produced
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| 2 types of muscle contractions | Isometric and isotonic
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| Insertion | The end of the muscle undergoing the greatest movement
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| Origin | The most stationary end of the muscle
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| Synergists | Muscles that work together to accomplish specific movements
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| Antagonists | Muscles that work in opposition to one another
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| Occipitofrontalis | Raises the eyebrows
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| Orbicularis oculi | Closes the eyelids & causes crows feet
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| Orbicularis oris | Puckers the lips
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| Buccinator | Flattens the cheeks
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| Orbicularis oris & buccinator | The kissing muscles
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| Zygomaticus | Smiling muscles
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| Levator labii superioris | Sneering
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| Depressor anguli oris | Frowning
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| Mastication-4 pairs | Chewing
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| Intrinsic tongue muscles | Change the shape of the tongue
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| Extrinsic tongue muscles | Move the tongue
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| Neck muscle | Sternocleidomastoid
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| Frontalis | Forehead
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| Platysma | Front neck muscle
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| Temporalis | Above ear
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| Masseter | Jaw like
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| Trapezius | Back neck
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| Cranial aponeurosis | Top of head
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| Triceps brachii | Extends the forearm
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| Biceps brachii | Flexes the forearm
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| Brachialis | Flexes forearm
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| Brachioradialis | Flexes and supinates the forearm
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| Flexor carpi | Flexes the wrist
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| Extensor carpi | Extends the wrist
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| Flexor digitorium | Extends the fingers
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Created by:
maggie33
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