Nervous System. Agriculture, Food, and, Natural Resource Standards Addressed AS.01.01. Evaluate the...
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Transcript of Nervous System. Agriculture, Food, and, Natural Resource Standards Addressed AS.01.01. Evaluate the...
Agriculture, Food, and, Agriculture, Food, and, Natural Resource Standards Natural Resource Standards
AddressedAddressed AS.01.01. Evaluate the development AS.01.01. Evaluate the development
and implications of animal origin, and implications of animal origin, domestication and distribution on domestication and distribution on production practices and the production practices and the environment. environment. AS.01.01.02.a. Research and summarize AS.01.01.02.a. Research and summarize
major components of animal systems. major components of animal systems.
Nervous SystemNervous System
Detects and processes Detects and processes information and information and
formulates responses; formulates responses; coordinates and controls coordinates and controls
all bodily activity.all bodily activity.
Nervous SystemNervous System
The nervous system The nervous system sends and receives sends and receives
impulsesimpulses
Nervous SystemNervous System
ImpulsesImpulses
-- electrical signals that electrical signals that travel though the nervous travel though the nervous
system and provide system and provide information to the brain.information to the brain.
Types of NeuronsTypes of Neurons
Sensory NeuronsSensory Neurons
– – carry impulses towards carry impulses towards the brain and spinal cord.the brain and spinal cord.
Types of NeuronsTypes of Neurons
Connecting NeuronsConnecting Neurons
– – carry impulses from one carry impulses from one neuron to another.neuron to another.
Types of NeuronsTypes of Neurons
Motor NeuronsMotor Neurons
– – carry impulses away from carry impulses away from the brain and spinal cord the brain and spinal cord
to the body.to the body.
Parts of a NeuronParts of a Neuron
Cell BodyCell Body
- often called the - often called the somasoma
- contains the cell nucleus- contains the cell nucleus
Parts of a NeuronParts of a Neuron
DendriteDendrite
-- branch-like branch-like
-- receives impulsesreceives impulses
Parts of a NeuronParts of a Neuron
AxonAxon
-- sends impulses away sends impulses away from the cellfrom the cell
Parts of a NeuronParts of a Neuron
SynapseSynapse
-- space in between space in between neuronsneurons
Parts of a NeuronParts of a Neuron
SynapseSynapse
- contains a chemical - contains a chemical substance called a substance called a
neurotransmitter neurotransmitter that helps that helps impulses travelimpulses travel
Parts of a NeuronParts of a Neuron
MyelinMyelin
-- protective sheath protective sheath around the neuronaround the neuron
Central Nervous Central Nervous SystemSystem
– – consists of: consists of:
brain brain
spinal cordspinal cord
Meninges
Medulla oblongata
Brain stem
Cerebrum
Cerebellum
Hypothalamus
Thalamus
Spinal cord
Pituitary gland
Central Nervous Central Nervous SystemSystem
BrainBrain
– – major organ of the major organ of the nervous system.nervous system.
Central Nervous Central Nervous SystemSystem
MeningesMeninges
– – three-layered protective three-layered protective covering of the brain.covering of the brain.
Central Nervous Central Nervous SystemSystem
CerebrumCerebrum
– – largest part of the brain largest part of the brain
Central Nervous Central Nervous SystemSystem
CerebrumCerebrum
-- has four lobes that receive has four lobes that receive and store information and and store information and are responsible for giving are responsible for giving
signals for voluntary signals for voluntary movement.movement.
Central Nervous Central Nervous SystemSystem
CerebellumCerebellum
– – coordinates all coordinates all movement, muscle movement, muscle
activity, and balance. activity, and balance.
Central Nervous Central Nervous SystemSystem
BrainstemBrainstem
– – connects the brain to the connects the brain to the spinal cord and contains spinal cord and contains the medulla oblongata.the medulla oblongata.
Central Nervous Central Nervous SystemSystem
Medulla oblongataMedulla oblongata
- dictates all life functions - dictates all life functions including: heart rate, including: heart rate, breathing, and reflex breathing, and reflex
actions.actions.
Central Nervous Central Nervous SystemSystem
ThalamusThalamus
– – a central relay system for a central relay system for all nerve impulses except all nerve impulses except
smell smell
Central Nervous Central Nervous SystemSystem
ThalamusThalamus
-- receives the impulses and receives the impulses and then directs them to the then directs them to the proper part of the brain.proper part of the brain.
Central Nervous Central Nervous SystemSystem
HypothalamusHypothalamus
– – serves as a link between serves as a link between the nervous system and the nervous system and the endocrine system.the endocrine system.
Central Nervous Central Nervous SystemSystem
Pituitary glandPituitary gland
– – secretes hormones secretes hormones important for reproduction important for reproduction
and growth.and growth.
Spinal CordSpinal Cord
– – pathway for all impulses pathway for all impulses going to and from the going to and from the
brain. brain.
Peripheral Nervous Peripheral Nervous SystemSystem
– – consists of nerves that consists of nerves that relay information to and relay information to and
from the spinal cord.from the spinal cord.
Peripheral Nervous Peripheral Nervous SystemSystem
Sympathetic Nervous System Sympathetic Nervous System
–– Responsible for emergency Responsible for emergency and stress responses:and stress responses:
““fight or flight”fight or flight”
Peripheral Nervous Peripheral Nervous SystemSystem
Parasympathetic Nervous Parasympathetic Nervous SystemSystem
-- Seeks to maintain and Seeks to maintain and restore normal body function, restore normal body function,
often called often called HomeostasisHomeostasis