Chapter 7 Flashcards
Controlling and communicating
Nervous system
- brain
- spinal cord
- anteriores, superior
Central nervous system
- spinal nervous (31 pairs)
- cranial nervous (12 pairs)
Peripheral nervous system
Concentration of the nerves system is at the head end
Cephalzation
Growth layers also know as
Germ layers
Outside skin (produce nerves system)
Ectoderm
Middle skin ( muscles and bones )
Mesoderm
Itermost skin
Endoderm
Negative inside, positive outside
Polarized
Opposite of polarized
Depolarization
Sodium ion share pushed out of the neuron by an active transport
Sodium-potassium pump
3 functions of a nerves system:
- Monitor changes (stimuli), gathered information is sensory input
- Process and interpret sensory I put, makes decisions - integration in spinal cord for brain
- Effects a response- motor output (response from muscles or glands)
Muscle coordination
Cerebellum
Hart rate, respirations
Medulla oblongata
Relay messages to other brain parts
Thalamus
Links left and right hemispheres
Corpus callosum
Relay messages to other brain parts
Pons
Sends messages to/from brain, reflex actions
Spinal cord
Controls all conscious actions: memory, judgment, sensory, voluntary muscles
Cerebrum
Secrets hormones to control other glands, growth, water balance
Pituitary gland
Carries information to the body
Dendrite
Pieces of ER
Nisel Bodies
Information is stored
Cell body
Carries information away
Axon
Allows for quick movement of impulses
Node of Ranvier
Arrives information to synaptic knob
Terminal branches
Release a Nerontransmitter
Synaptic knobs
Insulator, afatty covering
Myelin sheath
Nourish the myelin
Schwann cell
Makes ribosomes
Nucleolus
Control center
Nucleus
