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Muscles
N/A
62
Veterinary Medicine
Undergraduate 1
02/18/2013

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Cards

Term
Skeletal Muscle
Definition

Allows Movement

 

Voluntary; Striated 

Term

Cardiac Muscle

 

 

Definition

Only found in the heart

 

Involuntary; Striated

Term

Smooth Muscle

 

 

Definition

Allows internal movement

 

Involuntary; Nonstriated

Term
Tendons
Definition
Attach muscle to bones
Term
Aponeurosis
Definition
Attach muscle to bone or muscle
Term
Ligament
Definition
Attach bone to bone
Term
Origin
Definition
Stable site of muscle attachment
Term
Insertion
Definition
Site in muscle that undergoes the most movement
Term
Prime Mover
Definition
Makes a specific action
Term
Antagonist
Definition

Preforms opposite muscle action

 

Usually smooth motions

Term
Synergist
Definition
Contarcts and carries out actions in muscles
Term
Fixator
Definition
Stabilize Joints
Term
Muscle Naming
Definition

Shape

 

Location

 

Action

 

Direction of fibers

Term
Cutaneous Muscle
Definition

Twitches the skin

 

Thin/Broad

 

Located just under the skin

Term
Function of Head and Back Muscles
Definition

Facial Expressions

 

Supports Head

 

Mastication

 

Move Structures 

Term
Masseter Muscle
Definition
Closes Jaw
Term
Trapezius
Definition
Extend the head and neck
Term
Function of Abdominal Muscles
Definition

Support organs

 

Flex Back

 

Respiration

Term
Abdominal Muscles
Definition

External abdominal oblique 

 

Internal abdominal oblique

 

Rectus abdominis

 

Transverse abdominis  

Term
Linea Alba
Definition

White line where the right and left part of a muscle come together

 

Important for surgery

 

Heals fast

Term

Thoracic Limb Muscle

 

Latissimus

Definition
Flexes Shoulder
Term

Thoracic Limb Muscle

 

Pectoral

Definition
Adducts front leg
Term

Thoracic Limb Muscle

 

Deltoid 

Definition
Abducts and flexes shoulder joint
Term

Thoracic Limb Muscle

 

Biceps Brachii

Definition

Flexes elbow

 

 

Term

Thoracic Limb Muscle

 

Triceps Brachii

Definition
Extends Elbow
Term

Thoracic Limb Muscle

 

Extensor Carpi Radialis

Definition
Extends Carpus
Term

Thoracic Limb Muscle

 

Deep Digital Flexor 

 

Definition
Flexes the digits
Term

Pelvic Muscle 

 

Gluteal

Definition
Extends the hip
Term

Pelvic Muscle

 

Hamstring Group

 

Definition

Extends hip and flexes stifle joint

 

Biceps femoris, semimembranosus, semitendinosus

Term

Pelvic Muscle

 

Quadriceps Femoris

Definition
Extends stifle
Term

Pelvic Muscle

 

Gastrocnemius

Definition
Extends the hock
Term

Dorsal Muscle

 

Epaxials

Definition
Extends the vertebral column and allows lateral movement of the trunk
Term
Function of Respiratory Muscles
Definition
Increases and decreases the thoracic cavity
Term
Inspiratory Muscles
Definition

Diaphragm

 

External Intercostal Muscles

Term
Expiratory Muscles
Definition

Internal intercostal muscles

 

Abdominal muscles

 

 

Term

Intramuscular Injection Sites

 

Dog and Cat

Definition

Biceps 

 

Quadiceps

 

Triceps

 

Epaxials

Term

Intramuscular Injection Sites

 

Horses and Cattle

Definition

Gluts

 

Hamstrings

 

Triceps

 

Trapezius

Term
Skeletal Muscle Cells
Definition

Very large

 

Multinucleated

 

Actin and myosin myofibrils

 

Thick A bands - actin

 

Thick I bands - myosin

Term
Myofibrils
Definition
Sarcomeres lined up end to end
Term
Sarcomeres
Definition
Basic contracting unit of skeletal muscles
Term
Neuromuscular Junction
Definition
Nerves and muscles separated by the synaptic space
Term
Synaptic Vesicles
Definition

Sacs at the end of a nerve fiber

 

Contains acetylcholine

Term
Motor Unit
Definition
One nerve fiber and all the muscle fibers it innervates
Term
Function of Connective Tissue Layers
Definition

Holds components of the muscle together

 

Contains blood vessels and nerve fibers

Term
Connective Tissue Layers
Definition

Epimysium

 

Perimysium

 

Fascicles

 

Endomysium

Term
Epimysium
Definition

Fibrous layer composed of tough collagen fibers

 

Surronds groups of muscle fascicles

Term
Perimysium
Definition

Reticular fibers and thick collagen fibers

 

Surrounds fascicles

Term
Fascicles
Definition
Group of skeletal muscle fibers
Term
Endomysium
Definition

Fine reticular fibers

 

Surronds each muscle fiber

Term
Muscle Contraction and Relaxtion
Definition

Impulse reaches the sarcoplasmic reticulum 

 

Calcium ions are released into the sarcoplasm

 

Calcium diffuses into myofibrils and start the contraction process

 

Low calcium = no contraction

 

High calcium = twitching of the muscles 

Term
All or Nothing Principle
Definition

When stimulated muscle fibers either contracts or not at all

 

ATP produces energy

 

Creatine converts ADP into ATP

 

Glucose and oxygen

 

Term
Aerobic
Definition
Contains oxygen
Term
Anaerobic
Definition
Doesn't contain oxygen
Term
Anaerobic Metabolism
Definition

Used if oxygen need exceeds oxygen supply

 

forms lactic acid which leads to sore muscles

Term
Heat Production
Definition

Muscle activity produces heat

 

Panting and sweating eliminates excess heat

 

Shivering increases heat production

Term
Cardiac Muscle
Definition

Small Cells

 

Single Nucleus

 

Involuntary; Striated

 

Intercalated Disks

 

Gap Junctions

Term
Intercalated Disks
Definition
Attachment between cells
Term
Sinoatrial Node
Definition

Generates impulses that start each heartbeat

 

Wall of right atrium

 

Controlled path

Term
Sympathetic
Definition

Fight or Flight

 

heart beats fast

Term
Parasympathetic
Definition

Slows the heartbeat

 

Inhibits

Term
Smooth Muscle
Definition

Hollow organs

 

Multiunit

 

Small group of cells

 

 

Term
Visceral Muscle
Definition

Large sheets of cells in hollow organs 

 

Contracts

 

Empties

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