Biology Nervous system

• What is sypnapse?


  is send a message through the neurons
• corpus callosum


  the rigid layer that goes after the cortex

  
• cortex of the brain

  outer layer of the brain

  
• cerebellum


  Balance and coordination

  
• Hypothalamus


  next to the corpus callosum

  
• types of nervous system

  central nervous system and peripheral nervous system
• what does CNS stands for?

  central nervous system(brain+spinal cord)
• what does PNS stand for?

  peripheral nervous system(all over the body)
• Main division of PNS

  sensory,motor and interneurons
• whay are interneurons?

  neurons that bind sensory and motor neurons
• Motor is

  energy and movement
• involuntary types (peristaltic movement)


  sympathetic and parasympathetic
• sympathetic (involuntary)


  fight or flight, prepares body for stress
• parasympathetic(involuntary)

  rest and digest(sleeping)
• electrical messages are sent very quickly up to

  150 m/s
• Reflexes

  simple, automatic responses to sensory stimuli, such as the knee-reflex response
• brain of the neuron and dna

  nucleus

  
• branches that reach the messages to the neuron


  dentrite

  
• Nerve material wrapped around axon that allows nerve impulses to move faster. coat

  myelin sheath

  
• the cell's bell that something is coming from the dentrites

  cell body

  
• myelin cover and protector

  schwann cell

  
• a gap in the myelin sheath of a nerve

  node of ranvier