Chapter 6 Anatomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Contractility | show 🗑
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| show | the capacity of skeletal muscle to respond to a stimulus
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| Extensibility | show 🗑
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| Elasticity | show 🗑
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| show | surrounds the entire skeletal muscle
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| Fascia | show 🗑
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| Perimysium | show 🗑
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| Endomysium | show 🗑
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| Myofibrils | show 🗑
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| show | Actin and Myosin
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| Actin | show 🗑
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| Myosin | show 🗑
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| Sarcomere | show 🗑
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| Each sarcomere extends from one ____________ to another __________. Each _______________ is an attachment site for _____________. | show 🗑
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| What gives a sarcomere its banded appearance? | show 🗑
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| show | I band; actin
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| The ____________ extends the length of the myosin. It is the darker central region in each sarcomere. | show 🗑
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| What's in the center of each sarcomere? What does it consist of? | show 🗑
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| What is the dark staining band in the center of the sarcomere? | show 🗑
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| Resting Membrane Potential | show 🗑
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| show | The brief reversal back of the charge
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| Motor neurons | show 🗑
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| show | synapse; formed by an enlarged nerve terminal resting in an identation of the muscle cell membrane
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| show | a single motor neuron and all the skeletal muscle fibers it innervates
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| Enlarged nerve terminal | show 🗑
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| show | the sliding of actin myofilaments past myosin myofilaments during sontraction; H and I bands shorten, but A bands do not change in length
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| Muscle twitch | show 🗑
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| Threshold | show 🗑
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| Lag phase | show 🗑
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| show | where the muscle remains contracted without relaxing
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| show | recruitment
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| _____________ is needed for energy for muscle contraction | show 🗑
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| show | ADP plus phosphate
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| show | adenosine triphosphate
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| show | adenosine diphosphate
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| Anaerobic respiration | show 🗑
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| show | with oxygen (more efficient)
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| show | when ATP is used during muscle contraction faster than it can be produced
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| isometric | show 🗑
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| show | refers to constant tension produced by muscles of the body for long periods of time. Keeps head up and back straight
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| show | contract quickly and fatigue quickly. Well adapted to perform anaerobic metabolism. Ex. white meat of a chicken's breast
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| show | contact more slowly and are more resistant to fatigue. They are better suited for aerobic metabolism. Ex, dark meat of a duck's breast or the legs of a chicken
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| show | the most stationary end of the muscle; some muscles can have multiple heads
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| Insertion | show 🗑
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| show | the portion of the muscle between the origin and the insertion
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| Synergists | show 🗑
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| show | muscles that work in opposition to one another
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| Prime mover | show 🗑
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| show | raises the eyebrows
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| Orbicularis oculi | show 🗑
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| show | Puckers the lips
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| Buccinator | show 🗑
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| Zygomaticus | show 🗑
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| show | sneering
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| show | frowning
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| show | Chewing; 4 pairs of mastification muscles- 2 pair of pterygoids, temporalis, and masseter
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| Intrinsic Tongue Muscles | show 🗑
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| Extrinsic Tongue Muscles | show 🗑
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| show | lateral neck muscle and prime mover. Rotates and abducts the head
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| Erector spinae | show 🗑
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| Thoracic muscles most involved in breathing | show 🗑
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| External intercostals | show 🗑
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| Internal intercostals | show 🗑
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| show | accomplishes quiet breathing. Dome-shaped muscle. Aids in breathing
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| show | flex and rotate the vertebral column, compress the abdominal cavity, and hold in the abdominal viscera
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| show | tendinous area of the abdominal wall that consists of white connective tissue rather than muscle
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| On each side of the Linea Alba | show 🗑
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| show | cross the rectus abdominis at three or more locations, causing the adominal wall of a well-muscled person to appear segmented
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| show | trapezius
Serratus anterior
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| The arm is attached to the thorax by the | show 🗑
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| show | adducts and flexes the arm
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| Latissimus dorsi | show 🗑
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| Deltoid | show 🗑
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| Forearm movements | show 🗑
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| Trapezius | show 🗑
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| Serratus anterior | show 🗑
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| show | extends the forearm. Occupies the posterior compartment of the arm
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| show | flexes the forearm. Occupies the anterior compartment of the arm
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| show | flexes forearm
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| Brachioradialis | show 🗑
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| show | strong band of fibrous connective tissue that covers the flexor and extensor tendons and holds them in place around the wrist so that they do not "bowstring" during muscle contraction
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| Wrist and finger movements | show 🗑
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| show | flexes the wrist
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| Extensor Carpi | show 🗑
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| Flexor Digitorum | show 🗑
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| Extensor digitorum | show 🗑
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| The 19 hand muscles located within the hand | show 🗑
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| show | interossi muscles
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| show | buttocks; contributes most of the mass of the buttocks
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| show | hip muscle and common injection site
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| Leg movements | show 🗑
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| Quadriceps Femoris | show 🗑
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| show | "tailor's muscle";flexes the thigh
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| show | posterior thigh muscles; flexes the leg and extends the thigh
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| Gastrocnemius and Soleus | show 🗑
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| The gastrocnemius and soleus join to form the | show 🗑
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| show | Peroneus muscles
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| show | Insintric muscles
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