The nervous and endocrine systems
Jun 13, 2015
The nervous and endocrine systems
Nervous system
• Receives information• Processes, coordinates the information• Elaborates responses
Main elements
• Stimuli• Receptors: sensory organs• CNS • Effectors:– Muscles– Glands
• Neurons (nerves)
Neuron
Synapse: connection between neurons
• Animación• Page 80 book
What are stimuli?
• Think examples.• Street lights:– If red….we stop– If green….we cross
• Runners. Exit signal…they startt running
What happens between we detect a stimulus until we elaborate a response?
Detection of the stimuli by receptors
Receptors turn the stimuli into electrical impulsesInformation sent to the CNS (through the nerves)
CNS receives the info, coordinates it and elaborates a response
Neurons transmit the info to the effectors: muscles or glands
• Video sencillo partes sistema nervioso• http://educacion.practicopedia.lainformacion.
com/educacion-primaria-y-secundaria/como-funciona-el-sistema-nervioso-2386
Differences between nervous system and endocrine system
NERVOUS SYSTEM ENDOCRINE SYSTEM
Messengers ELECTRICAL IMPULSES HORMONES
Way of travelling NEURONS BLOOD
Speed VERY FAST SLOW
Duration SHORT EFFECT LONG/LASTING EFFECTS
• Video about CNS and PNS• http://www.youtube.com/watch?v=ErRdp9iJa-4
• Small test about the video• http://studyjams.scholastic.com/studyjams/jams/scien
ce/human-body/nervous-system.htm
• Video poner al final tema como repaso• http://studyjams.scholastic.com/studyjams/jams/scien
ce/human-body/nervous-system.htm
Spinal cord meninges
The brain
• 3 parts:• CEREBRUM• CEREBELLUM• BRAIN STEM
The meninges
Cerebrum
Two hemispheres: right and left
Cranial nerves
PNS
• Video about peripheral nervous system• http://www.youtube.com/watch?v=gFPMGdY
tcPU
Reflexes
• http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/responses_to_environment/thenervoussystemrev3.shtml
Knee-jerk reflex
• http://www.edoctoronline.com/media/19/photos_6D35D6F0-4EAD-46BB-A161-E961A93AB28B.jpg
• Video reflex arc• http://www.youtube.com/watch?v=Y5nj3ZfeY
DQ• http://www.youtube.com/watch?v=wLrhYzdb
bpE
• Quiz about the nervous system• http://www.vtaide.com/png/nervous-
mcq.htm• Another test • http://www.lrn.org/Content/Quizzes/
Qnervous.html
• Video endocrine system from 00:20” • http://www.youtube.com/watch?
v=lBWIkKfbW8U
• Flash animation hypothalamus-pituitary gland• http://bcs.whfreeman.com/thelifewire/
content/chp42/4202s.swf
• More links • Animation endocrine system-sugar levels• http://www.wiley.com/college/grosvenor/
0470197587/animations/endo3a/
• Blood sugar levels• http://bcs.whfreeman.com/thelifewire/
content/chp50/5002s.swf
Web pages
• http://www.watchknowlearn.org/Category.aspx?CategoryID=806
• http://www.watchknowlearn.org/Category.aspx?CategoryID=1841