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Cam hotstuff collins

Anatomy

QuestionAnswer
What are muscle cells made from? Muscle Fibers
What is the muscle responsible for smiling? Zygomaticus
What is a Sarcomere? The basic structural and functioned unity of unity of the muscles
What is Contractility? The ability of skeletal muscle to shorten with force.
What is excitability The capacity of skeletal muscle to respond to a stimulus
What is Extensibility The ability to be stretched
What is Elasticity The ability to recoil to their original resting length after they have been stretched
What is the Fascia It's another connective tissue located outside the epimysium
Define slow twitch Muscles that fatigue slowly
Define fast twitch Muscles that fatigue at a fast rate
What is tetany? Where the muscle remains contracted without relaxing
What is it called when the muscle fibers contract maximally All-or-none response
What is the increase in motor units being activated Recruitment
What is origin? It's is the most stationary end of the muscle
What is insertion? It's the end of the muscle undergoing the greatest movement
What is belly? It's the of the muscle between the origin and the insertion
Four major characteristics of skeletal muscles Contractility, Excitability, Extensibility, Elasticity
Each skeletal muscle is surrounded by a connective tissue sheath called? epimysium
A muscle is composed of? Humerus visible bundles called muscle fasciculi
What is perimysium? Loose connective tissue that surrounds muscle fasciculi
Fasciculi an composed of single muscle cells called? fiburs
Each fiber is surrounded by a connective tissue sheath called the? endomysium
The cytoplasm of each fiber is filled with? myofibrils
Threadlike structure that extends from one end of the fiber to the other? myofibrils
Myofibrils consist of 2 major kinds of protein fibers? 1. Actin myofilaments 2. myosin myofilaments
actin myofilaments? thin myofilaments
myosin myofilaments? thick myofilaments
Actin and myosin filaments form highly ordered units called sacromeres
sarcomere? basic structural and functional unity of the muscle
change difference across the membrane is called? resting membrane potential
The brief reversal back of the charge is called? actin potential
motor neurons? nerve cells that carry action potentials to skeletal muscle fibors
Each branch that connects to the muscle form a? neuromuscular junction or synapse
motor unit? single motor neuron and all t he skeletal muscle fibers it innurrates
The space between the presynaptic terminal and the muscle cell is the? synaptic cleft postsynaptic terminal
raises eyebrows occipitofrontalis
The enlarged nerve terminal is the? presynaptic terminal
closes eyelids and causes crows feet orbicularis oculi
Puckers mouth? orbiculi oris
flattens cheek? trumpeters mouth buccinator
responsible for smiling zygomaticus
responisble for sheering? levator labii superioris
responsible for frowning? depressor anguli oris
chewing? mastication
Tongue and swallowing muscles? intrinsic and extrinsic tongue muscles
changes shape of tongue? instrinsic tongue muscles
Moves the tongue extrinsic tongue muscles
neck muscles? sternocleidomastoid lactural neck muscle torticollis platysma
Brachialis? primary flexor of the forearm
tricep brachii? biceps brachii? extends forearm, flexes and suppinates forearm
Internal intercostals? contract during force expiration
External intercostals? elevate ribs during inspiration
Thoracic muscles? involved in breathing
Created by: CameronxxCollins