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The Muscular System
Chapter 10 bio_mlt
94
Biology
Undergraduate 2
11/12/2014

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Term
Abductor
Definition
moves a bone away from the midline
Term
Adductor
Definition
moves a bone closer to the midline
Term
Antagonistic
Definition
condition in which a muscle opposes or resists the action of another muscle
Term
Aponeurosis
Definition
sheetlike tendon of a muscle
Term
Cursorial
Definition
tetrapods that travel far or fast on the land
Term
Depressor
Definition
produces a downward movement
Term
Digitigrade
Definition
posture in which the wrist and ankle are carried off the ground and the animal walks its digits
Term
Epaxial
Definition
pertaining to structures that lie above or beside the vertebral axis
Term
Extensor
Definition
increases the angle at a joint
Term
Fascia
Definition
sheets of connective tissue that lie beneath the skin or ensheathe groups of muscles
Term
Flexor
Definition
decreases the angle at a joint
Term
Flight
Definition
use of wings to actively sustain movement through the air
Term
Fossorial
Definition
tetrapods that are adept at digging, and live a somewhat subterranean existence
Term
Gliding
Definition
use of broad membranes attached to limbs to increase surface area and travel a greater horizontal distance through the air
Term
Hypaxial
Definition
pertaining to structures that lie ventral to the vertebral axis
Term
Insertion
Definition
the point of attachment of a muscle that moves the most when the muscle shortens, or most distal end of limb muscles
Term
Levator
Definition
produces an upward movement
Term
Origin
Definition
the end of a muscle that attaches to the more fixed part of the skeleton, which is the proximal in limb muscles
Term
Oscillatory swimmers
Definition
propel themselves through the water with paddle-like movements of the appendages
Term
Parachuting
Definition
use of limbs and body to increase overall surface area to break an inadvertent fall
Term
Plantigrade
Definition
posture in which the soles of the feet are placed flat on the ground during locomotion
Term
Primary swimmers
Definition
species for which swimming is the sole pattern of locomotion
Term
Pronator
Definition
turns the palm downward
Term
Raphe
Definition
junction of two muscles at a band of connective tissue to form a line of fusion, such as linea alba
Term
Rotator
Definition
moves a bone around its longitudinal axis
Term
Saltatorial
Definition
tetrapods that jump or hop
Term
Scansorial
Definition
tetrapods adept at climbing
Term
Secondary swimmers
Definition
species which have readapted completely or partially to an aquatic mode of life from a terrestrial life
Term
Sphincter
Definition
decreases the size of an opening
Term
Suprinator
Definition
turns the palm upward or anteriorly
Term
Synergistic
Definition
condition in which the muscles work together to produce a common effect
Term
Tensor
Definition
makes a body part more rigid
Term
Undulatory swimmers
Definition
use the musculature of the fins only, or the fins in combination with the trunk and tail, to propel themselves through the water
Term
Unguligrade
Definition
a locomotory posture used by long legged tetrapods, which walk only on the tips of the digits such that the terminal end of the digit is modified to form a hoof, and other digits are lost
Term
Muscular tissue functions in
Definition
-movement and locomotion
-maintaining posture/vertical position
-generate heat
-can be modified to other structures as (electric organs)
Term
Thin filaments
Definition
composed of myosin
Term
Thick filaments
Definition
composed of actin, tropomyosin, and troponin
Term
Criteria for classifying muscles and include
Definition
-color
-location
-nervous system control
-embryonic origin
-general microscopic appearance
Term
Classifying muscles by color
Definition
-red (highly vascularized and rich in myoglobin; resist fatigue
-white (low vascularization and lower in myoglobin; quicker to fatiuge)
Term
Classifying muscles by location
Definition
-somatic (move bone or cartilage)
-visceral (control activities of organs, vessels, or ducts)
Term
Classifying muscles by nervous system control
Definition
-voluntary (under immediate conscious control)
-involuntary (are not)
Term
Smooth muscle
Definition
-found lining the walls of blood vessels, visceral organs
Term
Two types of smooth muscle
Definition
-unitary
-multiunit
Term
Unitary muscle
Definition
smooth muscle has self-initiated or myogenic contraction to aid in sustaining rythmic movement of organ with which it is associated
Term
Multiunit muscle
Definition
smooth muscle has neurogenic contraction, which requires action potential sent by neurons to regulate its action
Term
Cardiac muscle
Definition
-found in musculature of heart wall
-branching of the cells increase its overall connectivity
-doesn't fatigue readily
Term
Skeletal muscle
Definition
-closely associated with muscle skeleton and are used in locomotion
Term
Two meanings of muscle
Definition
-muscle cell or fiber
-muscle organ
Term
Muscle cell or fiber
Definition
the active contractile component: muscle cells and their endomysium
Term
Muscle organ
Definition
the whole organ; muscle cells plus asssociated connective tissues, nerves, blood supply
Term
In the shortest (longest) position, filament overlap interferes (very little with few) with cross-bridge formation and tension is ____
Definition
low
Term
T/F: Intermediate lengths generate maximum cross-bridging
Definition
True
Term
Tonic fibers
Definition
-relatively slow contracting and produce low force
-can sustain contraction for prolonged periods of time
-comprise most of the axial and appendicular skeleton
Term
Twitch (phasic) fibers
Definition
-generally produce fast contractions so they often make up muscles used for rapid movement
-slow twitch but slow take 2x longer to reach maximum forces
Term
Muscles arise from
Definition
-Mesenchyme
-Splanchnic layer of lateral plate mesoderm
-paraxial mesoderm (somites)
Term
First Fishes gill arch
Definition
Adductor mandibulae
Intermandibuularis
Term
Adductor mandibulae
Definition
closes jaw
Term
Intermandibularis
Definition
compresses throat
Term
Second Fishes gill arch (and 3-7)
Definition
constrictor
levator
Term
Constrictor
Definition
compresses gills/pharynx
Term
Levator
Definition
lifts gill bars
Term
First arch of Tetrapod
Definition
masseter
tempralis
pterygoids
diagastric
mylohyoid
Term
Masseter
Definition
closes jaw
Term
Temporalis
Definition
closes jaw
Term
Pterygoids
Definition
function in jaw movement
Term
Diagastric
Definition
opens the jaw
Term
Mylohyoid
Definition
opens the jaw
Term
Second arch in Tetrapod
Definition
platysma
Term
Platysma
Definition
moves skin of face and neck
Term
Other arches of Tetrapod
Definition
sternomastoid
cleidomastoid
Term
Sternomastoid
Cleidomastoid
Definition
turn head
Term
Coracoarcuals
Definition
opens mouth
Term
Coracomandibular
Definition
opens mouth
Term
Coracohyoid
Definition
helps in feeding
Term
Coracobranchial
Definition
helps in swallowing
Term
Tongue muscles
Definition
hyoglossus, styloglossus, genioglossus
Term
Geniohyoid
Definition
draws hyoid cranially
Term
Sternohyoid
Definition
draws hyoid posteriorly
Term
Longissiumus dorsi
Definition
extends vertebral column
Term
Iliocostalis
Definition
draws ribs together
Term
Multifidus spinae
Definition
extends vertebral column
Term
Spinalis dors
Definition
extends vertebral column
Term
Epaxial muslces of tetrapod
Definition
-longissimus dorsi
-iliocostalis
-multifidus spinae
-spinalis dorsi
Term
Hypaxial muscles of tetrapod
Definition
abdominal
respiratory
Term
Abdominal muscles
Definition
Rectus abdominis
Internal oblique
External oblique
Term
Respiratory muscles
Definition
serratus
scalenus
diaphragm
intercostals
Term
Serratus
Definition
draw ribs cranially
Term
Scalenus
Definition
flexes the neck
Term
Diaphragm
Definition
separates the thoracic/abdominal cavities, functions in breathing
Term
Intercostals
Definition
protract/retract ribs
Term
Requirements of swimmers
Definition
-reduce the resistance that water offes to motions of moving the body
-propel themselves in a relatively dense medium
-control vertical position in the water
-maintain orientation and steer the body
Term
Characteristics of primary swimmers
Definition
-fusiform body
-segmented myomeres
-integument attached strongly
Term
Secondary swimmers
Definition
have paddle-like movements
oscillatory swimmers
Term
Characteristics of secondary swimmers
Definition
-undergo secondary adaptations to circulatory/respiratory and sensory systems to tolerate high pressures
-webbing or flippers to assist propulsion
-well developed appendicular musculature
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