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Neuron & Nervous System. http://biodeluna.wordpress.com. image from http://protomag.com/assets/fertile-ground. The Stimulus-Response Pathway. http://www.vce.bioninja.com.au/aos-2-detecting-and-respond/coordination--regulation/nervous-system.html. "Como hay talentos

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neuron nervous system

Neuron & Nervous System

http://biodeluna.wordpress.com

the stimulus response pathway
The Stimulus-Response Pathway

http://www.vce.bioninja.com.au/aos-2-detecting-and-respond/coordination--regulation/nervous-system.html

slide4
"Como hay talentos

por el estudio,

hay tontos entontecidos por desuso."

give 3 examples of effectors
Give 3 examples of Effectors :

(Effectors are parts of the body that produce a response)

http://arturogoicoechea.wordpress.com/2010/05/24/neuronasneurons/

give 3 examples of effectors1
Give 3 examples of Effectors :

(Effectors are parts of the body that produce a response)

  • a muscle contracting to move an arm
  • a muscle squeezing saliva from the salivary gland
  • a gland releasing a hormone into the blood
slide10
Lo peor no es cometer un error, sino tratar de justificarlo, en vez de aprovecharlo como aviso providencial de nuestra ligereza o ignorancia.
slide12
The central nervous system is comprised of the brain and spinal cord.
  • The peripheral nervous system includes all peripheral nerves.
c n s
C.N.S.
  • Cerebrum
  • Cerebellum
  • Brain stem
name the two structures which make up the central nervous system1
Name the two structures which make up the central nervous system.
  • The central nervous system consists of the brain and

spinal cord.

nerves
Nerves
  • Nerves → Collections of neurons that are joined together by connective tissue.
the neuron
The Neuron
  • The basic functional unit of the nervous system.
slide20
(Petilla de Aragón, Navarra, 1 de mayo de 1852 - Madrid, 17 de octubre de 1934)

Santiago Ramón y Cajal (Petilla de Aragón,1 May 1852 – Madrid 18 October 1934)

Spanish pathologist, histologist, neuroscientist, and Nobel laureate in 1906

Education at: Universidad de Zaragoza (1873

function
Function:
  • Send impulses to and from the Central Nervous System and Peripheral Nervous System and the effectors (muscles/glands)
slide23
Dendrite→ Fine hair-like extensions on the end of a neuron.
    • Function: receive incoming stimuli.
  • Cell Body or Soma → The control center of the neuron.
    • Function: Directs impulses from the dendrites to the axon.
  • Nucleus → Control center of the Soma.
    • Function: Tells the soma what to do.
  • Axon→ Pathway for the nerve impulse (electrical message) from the soma to the opposite end of the neuron.
  • Myelin Sheath → An insulating layer around an axon, It is made up of Schwann cells.
  • Nodes of Ranvier → Gaps between schwann cells.
    • Function: Saltatory Conduction (Situation where speed of an impulse is greatly increased by the message

‘jumping’ the gaps in an axon).

slide25
(a) The nerve fibres which carry impulses from the sense organs to the central nervous system are called …..….. fibres.
  • (b) The nerve fibres which carry impulses from the central nervous system to the glands and muscles are called …..….. fibres.
sensory
sensory
  • (a) The nerve fibres which carry impulses from the sense organs to the central nervous system are called …..…..... fibres.
  • (b) The nerve fibres which carry impulses from the central nervous system to the glands and muscles are called ……..….. fibres.
sensory1
sensory
  • (a) The nerve fibres which carry impulses from the sense organs to the central nervous system are called …..…..... fibres.
  • (b) The nerve fibres which carry impulses from the central nervous system to the glands and muscles are called ……..….. fibres.

motor

slide28

Complete the passage below, selecting the appropriate words from the list below.sensory, nerve fibre, cell body, impulses, dendrons, dendrites, motor, contact, axons, synapses, cytoplasm

A neurone (nerve cell) consists of a ….. A ….. containing a nucleus surrounded by ….. B ….. Branching filaments, called ….. C ….., extend from the cell surface and make ….. D ….., with other neurones. In ….. E ….. and ….. F ….. neurones, one of the filaments is very long and is called …… G ….. 

slide29

Complete the passage below, selecting the appropriate words from the list below.sensory, nerve fibre, cell body, impulses, dendrons, dendrites, motor, contact, axons, synapses, cytoplasm

A neurone consists of a cell body(A) containing a nucleus surrounded by cytoplasm (B).

Branching filaments, called dendrites(C), extend from the cell surface and make synapses(D) with other neurones. In sensory(E) and motor(F) neurones, one of the filaments is very long and is called a nerve fibre(G).

the synapse
The Synapse
  • The junction between two neurons is called a ________________, it forms a physical ______ between the pre-synaptic and post-synaptic neurons
  • An action potential (__________signal) cannot cross the synaptic gap, so it triggers the release of chemicals (______________) to continue the signal
the synapse1
The Synapse
  • The junction between two neurons is called a Synapseit forms a physical Gapbetween the pre-synaptic and post-synaptic neurons
  • An action potential (Electricalsignal) cannot cross the synaptic gap, so it triggers the release of chemicals (Neurotransmitters) to continue the signal
neurotransmitters
Neurotransmitters

Neurotransmitters are endogenous chemicals that transmit signals from a neuron to another cell across a synapse.

slide34

Overview of Synaptic Transfer

http://www.vce.bioninja.com.au/aos-2-detecting-and-respond/coordination--regulation/nervous-system.html

give 3 examples of reflex actions1
Give 3 examples of reflex actions.
  • change in size of the pupil of the eye in response to light intensity,
  • blinking in response to foreign particles on the cornea,
  • coughing or sneezing in response to irritation of the nasal passages and trachea or bronchi,
  • knee jerk in response to a blow on the tendon of the leg extensor muscle,
  • rapid removal of the hand from a hot or sharp object

(any three)

which one is a
Which one is a … ?

motor neuron

interneuron

sensory neuron

a) b) C)

slide43

Consists of: Brain and Spinal Cord

Cerebrum

brain

Cerebellum

Medulla Oblongata

Spinal Cord

slide44
BBC - GCSE Bitesize: The nervous system
  • BBC - GCSE Bitesize: Receptors and effectors