Final Exam - Domain One Flashcards
Communication network within the body
Nervous System
Brain and spinal cord; coordinates activity in the body
Central Nervous System (CNS)
Nerves connecting the CNS to the rest of the body and environment
Peripheral Nervous System (PNS)
What are the two peripheral nervous system subdivisions?
Somatic and Autonmic
Serves the outer areas of the body and skeletal muscle; voluntary
Somatic
Involuntary systems (e.g. heart, digestion)
Autonomic
What are the two autonomic subdivisions?
Parasympathetic and Sympathetic
Decreases activation during rest and recovery
Parasympathetic
Increases activation to prep for activity
Sympathetic
Functional unit of the nervous system
Neuron
What are the two type of neurons
Motor (efferent) and Sensory (afferent) Neurons
Transmit nerve impulses from CNS to effector sites
Motor (efferent) Neurons
Respond to stimuli; transmit nerve impulses from effector sites to CNS
Sensory (afferent) neurons
Sense distortion in body tissues
Mechanoreceptors
What are the three functions of the nervous system?
Sensory, Integrative, and Motor
Respond to pressure, acceleration, deceleration of joints
Joint Receptors
Sense changes in the muscular tension
Golgi Tendon Organs (GTO)
Sense changes in muscle length
Muscle Spindles
Connect muscle to bone; provide anchor for muscles to produce force
Tendons
Outer layer of connective tissue surrounding a muscle
Fascia
Bundles of individual muscle fibers
Fascicles
Cellular components of myofibrils encased in a plasma membrane
Muscle Fiber
Produces muscular contraction; repeating sections of actin and mysosin
Sarcomere
Thick and thin filaments slide past one another, shortening the entire sacomere
Sliding Filament Theory