B10 - The Human Nervous System Flashcards
Conditions inside the body are known as the ________ environment.
Internal.
Your body cannot keep working if the ________ environment changes.
Internal.
The balancing act of containing the bodies ________ environment is called ___________.
Internal…Homeostasis…
________ only work at their best in specific conditions of Temperature and pH.
Enzymes.
Enzymes control all the __________ of the Cell.
Functions.
Examples of Internal Conditions that are controlled in the body:
Water Content, Body Temperature and Blood Glucose Concentration.
Homeostasis involves __-__________ and control.
Co-Ordination.
Detecting changes and responding to them involves _________ control systems.
Automatic.
Automatic Control Systems include ________ responses in the Nervous System and ________ responses in the Hormone System.
Nervous…Chemical…
_________ detect changes in the internal or external environment known as _______.
Receptors…Stimuli…
Receptors are part of the ________ or _________ Control System in the body.
Nervous…Hormonal…
__-__________ Centres are areas that receive and _______ the information given by the Receptors.
Co-Ordination…Process…
Co-Ordination Centres send out a ______ and co-ordinate the ________ of the body.
Signal…Response…
The _____ and ______ cord act as Co-Ordination Centres for both the _______ and ________ System.
Brain…Spinal…Nervous…Hormonal…
Responses of the Effectors restore __________ in the body to the Optimum Level.
Conditions.
Effectors are _______ or Glands that respond to a ________ that has been received.
Muscles…Stimulus…
What are the Control Systems?
Receptors, Co-Ordination Centres and Effectors.
The Nervous System carries _________ Signals known as Impulses that ______ to changes in the Environment.
Electrical…Changes…
Receptor Cells have a ______, Cytoplasm and a ____ Membrane.
Nucleus…Cell…
Receptor Cells are usually found in _______ Sense Organs, like the Eye or Skin.
Special.
We have different types of _______ Receptors.
Sensory.
When a _______ Receptor detects a Stimulus, information is sent as an Electrical _______ that passes along Special Cells called Neurones.
Sensory…Impulse…
Thousands of Neurones clustered together are called ______.
Nerves.
The Electrical Impulse travels along the ________ until it reaches the _______ _______ ______ (CNS).
Neurone…Central Nervous System…
What is the Central Nervous System (CNS) made up of?
The Brain and Spinal Cord.
Cells that carry ________ Impulses from your Sense Organs to your Central Nervous System (___) are called _______ Neurones.
Electrical…CNS…Sensory…
The Brain receives and sends information back out along Special _____ called _____ Neurones.
Cells…Motor…
Motor Neurones carry information from the _______ _______ ______ (CNS) to the rest of your body.
Central Nervous System.
Motor ________ carry Electrical ________ to make the Effectors respond.
Neurones…Impulses…
Muscles respond to _________ Impulses by contracting.
Electrical.
Your Glands respond to Electrical _________ by releasing ________ Substances
Impulses…Chemical…
How is your Nervous System summed up:
Stimulus –> Receptors –> CNS –> Effectors
Automatic _________ are known as Reflexes.
Responses.
Reflexes DO NOT involve the conscious part of the _____.
Brain.
What the three types of Neurones?
Sensory, Motor and Relay.
Relay Neurones connect a _____ Neurone and a _______ Neurone and are found in the Central Nervous System (___).
Sensory…Motor…CNS…
An ________ Impulse passes from the Receptor along the _______ Neurone to the CNS, then passes a Relay _______ and back along the _____ Neurone. The Electrical _______ will arrive at the Effector organ. We call this pathway a Reflex ___.
Electrical…Sensory…Neurone…Motor…Impulse…Arc…
What do Reflex Arc’s do?
Bypass the conscious areas of the Brain.
Neurones are ___ joined up directly together.
Not.
There are ‘junctions’ between ________ called Synapses.
Neurones.
Electrical ________ have to cross certain Synapses.
Impulses.
The Reflex Pathway is:
Stimulus –> ________ –> Sensory _______ –> _____ Neurone –> Motor Neurone –> ________ –> Response
Receptor…Neurone…Relay…Effector…
When you touch a hot object, a ________ in your skin is stimulated.
Receptor.
When you touch a hot object, an ________ Impulse from a Receptor passes along a _______ Neurone to the Central Nervous System (CNS).
Electrical…Sensory…
When an Electrical _______ from the Sensory _______ arrives at the Synapse with the _____ Neurone, a chemical is released.
Impulse…Neurone…Relay…
The chemical made diffuses across the Synapse to the Relay _______ where it sets off an _________ Impulse that travels along the Relay Neurone.
Neurone…Electrical…
When the Electrical _______ from the Chemical reaches the Synapse between the _____ Neurone and a _____ Neurone, another Chemical is released. Again this Chemical diffuses and creates another Electrical Impulse travelling down the Motor _______ to the Effector.
Impulse…Relay…Motor…Neurone…
When the final Electrical _______ reaches the ________ Organ, it is stimulated to respond.
Impulse…Effector…
