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