Muscles Flashcards
Block 1 (29 cards)
Types of muscles
smooth, cardiac, skeletal
Smooth muscle
not striated, occurs in walls of internal organs, is involuntary
Cardiac muscle
striated, occurs in walls of heart, is involuntary
Skeletal muscle
striated, usually attached to skeleton, is voluntary
Autonomic
involuntary
Striated
having long, thin lines
Visceral
related to organs
Smooth muscle pt. 2
slow, sustained contractions, visceral, autonomic control, walls of GI tract, walls of arteries and veins, arounf glands
Cardiac muscle pt. 2
Visceral, autonomic, in the wall of the heart
Skeletal muscle pt.2
used for locomotion, most cross one or more joints and have actions on the joints
Muscle contraction
shorteninf of the muscle causes change
Contaction mean flexion
FALSE
Muscle attachments
classified as origins or insertion
Muscle origin
known as proximal attachment, the part that is more fixed
Muscle insertion
known as distal attachment, part that moves the most
Thoracic limb examples
extrinsic muscles and intrinsic muscles
Extrinsic Muscles
attach limb to axial skeleton
Brachinocephalicus
Origin - caudal skull
insteriton - cranial humerus
action - extend shoulder
Intrinsic Muscles
within the limb
Extensor Carpi radialis
Origin - distal, cranial humerus
Insertion - dorsal, metacarpal 2 and 3
Action - extend carpus
Pelvis Limb muscle examples
Gracilis, gastrocnemius
Garcilis
Origin - pelvic symptomshysis
Insertion - tibia and caudal aspect of tarsal bone
Action - adduct limb, extend hip and tarsus, flex stifle
Gastrocnemius
origin - distal, caudal femur
instertion - causal aspect of tarsal bone
action - extend tarsus, flex stifle
Epaxial muscles
lie dorsal to the vertebrae, extensors of the vertebral column (extend, better posture)
