Domain 1 Flashcards
(122 cards)
Nervous System
Communication network within the body
Central Nervous system CNS
Brain and spinal cord it cordinates activity of they body
Peripheral nervous system PNS
Nerves connecting the CNS to the rest of the body and enviroment
Periphear nervous system subdivions
Somatic: Serves outer areas of the body and skeletal muscles.
Autonomic: Involntary systems such as heart or digestive system
Autonmic subdivions
Parasympathetic: Decrease activiation during rest and recovery
Sypathetic: Increase activaition to prep for activity
Neuron
Function unit of the nervouse system
Motor (Efferent) neurons
Transmit nerve impules from CNS TO EFFECTOR SITES
Sensory (Afferent) Neurons
Respinde to stimuli; transmit nerve impules from effector sites to CNS
Mechanoreceptors
Sense distortion in body tissues
Joint Receptors
Respond to pressure, acceleration, and deceleration on joints
Golgi tendon organs GTO
Senses change in muscular tension
Muscle Spindles
Sense Changes in muscle length
Tendons
Connect muscle to bone and provide an ancor point for muscles to produce force
Fascia
Outer layer of connective tissue surrounding a muscle
Fascicles
Bundle of individule muscle fibers
Muscle fiber
Celluelar components and myofibrils encaes in plasma membrane
Sarcomere
Produces muscular contracation; repeating section of actin and myosin
Sliding filament theory
Thick and think filaments slide past one another, shortening the entire sacomere
Type 1 slow twitch muscles
smaller size and fatigue slowly
Type 2 quick twtich muscles
larger in size are quick to produce maximal tension and fatigue quickly
Motor unit
One motor neuron and the muscle fibers it connects with
Neural activation
Contraction of a muscle generated by neaural stimulation
Neurotransmitter
Chemicl messengers that transport impulses from nerve to muscle
Local stabilaztion system
Attaches directly to vertebrea consistes of the transvere abdominis, internal oblique, multifidus, pelvic floor and diaphragm