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Worsham Anatomy Q2

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Question
Answer
the study of joints   athrology  
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synarthroses joints, example   immovable, sutures  
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amphiarthroses joints, example   slightly movable, vertabre  
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diarthroses, example   freely movable, shoulder, hip & knee  
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structural classification is based on   the material that binds the bones together & on presence or absence of the joint cavity  
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what are the types of joints   fibrous (sutures), carilaginous (disc of fibrocartalige), synovial (freely movable)  
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what type of joint has a cavity   synovial  
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ends of opposing bones are covered with hyaline cartilage to absorb compression   articular cartilage  
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this is unique to synovial joints   joint cavity (synovial cavity), holds a small amount of fluid  
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joint capsule (articular capsule) has ______   2 layers  
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fibrous capsule is   outer layer of fibrous capsule, dense irregular connective tissue that strengthens the joint  
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inner layer is   synovial membrane, loose connective tissue that lines joint capsule & covers internal joint surfaces  
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what is the function of the inner layer   make synovial fluid  
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what is synovial fluid   viscous fluid similar to raw egg white, filtrate of blood, contains glycoprotein molecules  
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purpose of synovial joints   reinforcing ligaments  
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synovial joints are richly or poorly supplied with nerves & vessels?   richly  
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most of the blood is supplied to   the synovial membrane  
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some synovial joints contain   an articular disc, such as the knee joint, bones with a somewhat different shape  
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Bursae & tendon sheaths are synovial joints, T/F   false  
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described as a closed bag of lubricant to reduce friction   bursae & tendon sheaths  
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bursa   flattened fibrous sac lined by a synovial membrane  
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tendon sheath   elongated bursa that wraps around a tendon  
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the only places articular surfaces play a major role in joint stability   elbow, knee, hip  
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the more ______ in a joint, the stronger it is, generally dense regular connective tissue, attches bone to bone   ligaments  
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what is the most important factor in joint stability, keeps tension on muscle tendons   muscle tone  
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gliding   flat surfaces of 2 bones slip across each other (carpals, tarsals, articular processes of vertebrae)  
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flexion   decrease the angle between 2 bones (flexing a bicept)  
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extension   increase the angle between bones (extending/straightening the arm)  
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abduction   moving a limb away from the body (spreading the fingers)  
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adduction   moving a limb toward the midline (bring the arm back to your side)  
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circumduction   moving a limb or finger so that it describes a cone in space (involves flexion, extension, abduction & adduction)  
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medial rotation   rotating the forearm posteriorly (palm faces posteriorly)  
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lateral rotation   rotating the forearm anteriorly (palm faces anteriorly)  
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supination   forearm rotates laterally (palm faces anteriorly)  
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pronation   forearm rotates medially (palm faces posteriorly)  
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dorsiflexion   lifting the foot so its superior surface approaches the shin  
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plantar flexion   depressing the foot (pointing the toes)  
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inversion   turning the sole medially (inward)  
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eversion   turning the sole laterally (outward)  
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protraction   nonangular movement of jetting out the jaw  
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retraction   nonangular movement of pulling back the jaw  
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elevation   lifting the body superiorly (closing the mouth)  
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depression   moving the elevated part inferiorly (opening the mouth)  
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opposition   movement of the thumb to touch the tips of other fingers on the same hand (opposable thumbs)  
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shoulder & hip joints are   ball-n-socket joints  
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elbow & knee joints are   hinge joints  
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study of muscle   myology  
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types of muscle tissue   skeletal muscle, smooth muscle, cardiac muscle  
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muscle that is attached to the skeleton   skeletal muscle  
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function of smooth muscle   squeeze fluids & other substances through hollow organs  
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type of muscle that propels blood through the circulatory system   cardiac muscle  
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functions of muscle tissues   movement, maintenance of posture, joint stabilizaiton, heat generation  
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functional features of muscle tissue   contractability, excitabililty, extensibility, elasticity  
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long cells shorten & generate pulling force   contractability  
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electrical nerve impulse stimulates the muscle cell to contract   excitability  
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can be stretched back to its original length by contraction of an opposing muscle   extensibility  
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can recoil after being stretched   elasticity  
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skeletal muscle tissue (fibers) are voluntary or involuntary, striated or non-striated   voluntary, striated  
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cardiac muscle tissue is voluntary or involentary, striated or non-striated   involuntary, striated  
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smooth muscle tissue ia voluntary or involentary, striated or non-striated   involuntary, non-striated  
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what are the 3 types of connective tissue sheaths for skeletal muscle tissue   epimysium, perimysium, endomysium  
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which sheath covers an individual nerve   endomysium  
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perimysium makes a   bundle  
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which sheath covers a whole bunch of nerves   epimysium  
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the less moveable part of muscle attchment   origin  
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the more moveable part of the muscle attchment   insertion  
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insertion is ____ ______ the orgin   pulled toward  
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direct attachments have long or short strands   short  
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indirect attachments have long or short strands   long  
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tendons are ______ and connect _________   rope-like, muscle to bone  
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aponeurosis are _______   flat sheets  
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ligaments connect   bone to bone  
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"muscle of surprise" that raises the eyebrows, forms transverse furrows on the forehead   frontalis  
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origin and insertion of the frontalis   galea aponeurotica, sking of eyebrows & root of the nose  
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origin and insertion of occipitalis and what does it do   occipital bone, galea aponeurtica, draws scalp back  
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sphincter muscle that encirbles and closes the eye also forms optic facial sulci or "crows feet"   orbicularis oculi  
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sphincter muscle that encircles the mouth and closes the lips   orbicularis oris  
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"laughing muscle" that raises lateral corners of the mouth upward   zygomaticus major  
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"smiling muscle" that raises lateral corner of the mouth upward, also lateral head of the quadratus labii superioris   zygomaticus minor  
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"snarling muscle" that raises the angle of the mouth   levator anguli oris  
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"triangularis" that draws the angle of the mouth down   depressor anguli oris  
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"false smiling muscle" that draws the angle of the mouth backward   risorius  
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muscle that raises the upper eyelid   levator palpebrae superioris  
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"trumpeter's" or "bugler's muscle" that compresses the cheek   buccinator  
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"frowning muscle" that draws eyebrows down & in and forms vertical interciliary sulci   corrugator  
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draws skin of the forehead down & forms transverse interciliary sulci   procerus  
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raises the upper lip & is the intermediate head of the quadratus labii superioris   levator labii superioris  
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"common elevator" that diates nostril & raises the upper lip and is the medial head of the quadratus labii superioris   levator labii superioris alaeque nasi  
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"quadratus" that draws the lower lip down   depressor labii inferioris  
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protrudes the lower lip, wrinkles the chin   mentalis  
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"muslce of mastication" strongest chewing muscle, that closes the jaw   temporalis  
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origin and insertion of the temporalis   temporal bone (temporal fossa), mandible (coronoid process)  
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"muscle of mastication" chewing muscle that closes the jaw   masseter  
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"SCM" rotates & flexes the head   sternocleidomastoid  
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"shock & horror muscle" that orginiates at the clavicle & pectoralis and inserts at the mandible   platysma  
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elevates the hyoid bone and has an anterior & posterior belly   digasticus  
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depresses the hyoid and has an inferior & superoir belly   omohyoid  
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lateral & medial chewing muscles that aid in side-to-side (grinding) movements   pterygoid muscles  
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muscles that have opposing actions   antagonistic  
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synergistic muscles work together or against one another   together to perform the same action  
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pectoralis major   muscle of the chest; anterior thorax, fan-shaped conberges & inserts on the humerus; arm adduction  
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external intercostals   between the ribs; elevates the ribs in breathing (increases thoracic capacity)  
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internal intercostals   between the ribs; depresses the ribs in breathing (decreases thoracic capacity)  
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diaphragm   phrenic muscle; originates at the sternum, ribs & bertebrae, insterts at the central tendon; increases thoracic capacity  
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3 opening in the diaphram   vena cava, aorta, esophagus  
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trapezius dorsi   lower back muscle; extends, adducts & rotates the humerus  
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ructus abdominus   anteromedial abdominal/horizontal tendious intersections; flexes the truck; linea alba  
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external obliques   MOST SUPERFICIAL of anterolateral abdominal muscles; inserts at linea alba; action: compresses the abdomen  
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internal obliques   INTERMEDIATE anterloateral abdominal muscles; inserts at linea alba; action: compresses the abdomen  
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transversus abdomius   DEEPEST anterolateral abdominal muscles; inserts at linea alba; action: compresses the abdomen  
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psoas major   POSTERIOR abdominal wall muscle; action: flexes the thigh  
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