Transcript Nervous System - Grand Haven Area Public Schools

Nervous System & Endocrine
System
Nervous System: Sending messages fast but they
don’t last long
Endocrine System: Sending messages slowly but
they last a long time
•Types of Neurons
•Parts of the Nervous System
•Glands & Hormones of the Endocrine System
Endocrine System
Uses hormones that travel through the bloodstream. Takes
longer to get there but lasts a long time
3 types Neurons
Types of Neurons
Sensory
Motor
Interneurons
Sensory Neurons
• INPUT From sensory organs to the brain
and spinal cord
Drawing shows a
somatic neuron
Sensory
Neuron
Brain
Spinal
Cord
Motor Neurons
• OUTPUT From the brain and spinal
cord, to the muscles and glands
Sensory
Neuron
Brain
Spinal
Cord
Motor
Neuron
Interneurons
• Interneurons
carry
information
between other
neurons only
found in the
brain and spinal
cord
Sensory
Neuron
Brain
Spinal
Cord
Motor
Neuron
The Reflex
Works by bypassing the brain so you can react quicker.
Sensory Neuron
Interneuron
Motor Neuron
A Neural Chain
A Neural Chain
A Neural Chain
A Neural Chain
A Neural Chain
A Neural Chain
The Nervous System:
Sends messages quickly but they don’t last long.
Broken into two parts:
• Central Nervous System (CNS)
– Brain and spinal cord
• Peripheral Nervous System (PNS)
– Carries messages to and from CNS
The Nervous System: It breaks down into two parts.
Central nervous
system
Peripheral
nervous system
Sympathetic and parasympathetic divisions
of the nervous system
Summary of autonomic
differences
Autonomic nervous system controls physiological arousal
Sympathetic
division (arousing)
Pupils dilate
Parasympathetic
division (calming)
EYES
Pupils contract
SALIVATION
Increases
Perspires
SKIN
Dries
Increases
RESPERATION
Decreases
Accelerates
HEART
Slows
Inhibits
DIGESTION
Activates
Secrete stress
hormones
ADRENAL
GLANDS
Decrease secretion
of stress hormones
Decreases