Kasadie Schnelbach, Period 1, Nervous System
Functions
reacts to changes happening both outside and inside the body
uses both electrical and chemical means to send and receive messages
helps all the parts of the body to communicate with each other
Divisions of the Nervous System
Central Nervous System: controls most functions of the body and mind
Peripheral Nervous System
Brain:controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger and every process that regulates our body
Spinal Cord: allows you to control your movements
Afferent: signals that come from outside stimuli and tell your brain what they are sensing
Efferent: transmits impulses from the CNS out to the peripheral organs to cause an effect or action
Tissues
Neurons
Neuroglia
process information
provide the neurons with mechanical and metabolic support
Neuron Classifications:classified functionally according to the direction in which the signal travels, in relation to the CNS
bipolar
unipolar
multipolar
Connective Tissue Coverings
Parts of the Brain
Parts of Spinal Cord
Action potential: sudden reversal of the electrical gradient across the plasma membrane of a resting neuron
Cranial Nerves: facilitates communication between the brain and other parts of the body
Spinal Nerves: forms the spinal cord to innervate the rest of the body
Neurotransmitters: Chemical messengers in the body
Autonomic Nervous System: regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion, and sexual arousal
Reflex Arc
Nervous System Disorders
Drugs
cerebellum: Maintenance of balance and posture
brainstem: controls breathing and maintaining your heart rate
cerebrum:interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement
Nerve Impulses: electrical phenomenon that occurs from a difference in electrical charge across the plasma membrane of a neuron
perimysium
endomysium
epimysium
thoracic
lumbar
cervical
sacral
enteric nervous system: control motor functions, local blood flow, mucosal transport and secretions
sympathetic nervous system: produce localized adjustments
parasympathetic nervous system: Regulates digestion, sexual arousal, & slows your heart rate and lowering the blood pressure
Hypertension: High Blood Pressure
Raynaud's Disease: exageration of vascontriction in the fingers and toes
Autonomic Neuropathy: damage of the autonomic nerves
Dissociative Drug: Chemical substance that can cause hallucinations
Heroine: Give a feeling of sedation
Psychedelics: Group of drugs that can increase heart rate
Ecstasy: Affect mood, sleep, & appetite
Nicotine: Active substance that increases heart rate
Marijuana: Slow down movement
MDMA: Chemical that increases your energy
Methamphetamine: intense pleasure
Inhalents: Chemical that can inpair coordination
Alcohol: Affect decision making & impulse control
Opioids: Drug that can have a result of a rush of pleasure
Cocaine: loss of control in voluntary movements
LSD: Can expirence wakefullness
Learned: Results from practice or repetiton
Somatic: Activates skeletal muscle
Inborn: Motor response to stimulus
Autonomic: Activates Visceral effectors