Nervous System Brain

Nervous system intro

By Zsuzsanna Harmati

Multiple Choice

Nerve Cells are also called:

• Capillaries
• Axons
• Neurons
• NeoCortex

Multiple Choice

True or False? The Autonomic System controls voluntary actions?

• True
• False

Multiple Choice

The part of the neuron that receives signals is the:

• Axon
• Dendrite
• Axon Terminal
• Cell Body

Multiple Choice

What is the main control center of the body that contains the brain and spinal cord?

• Peripheral nervous system
• Central nervous system
• Autonomic nervous system
• Somatic nervous system

Multiple Choice

The Peripheral Nervous System (PNS) contains:

• the cranial nerves, ganglia, and all other parts of the nervous system except for the brain and spinal cord
• the brain, the optic nerves, and other nerves in your head
• the spinal cord and several nerves in your feet and legs

Multiple Choice

Heartbeat, digestion, and other involuntary actions are accomplished by which branch of the nervous system?

• Sensory
• Autonomic
• Lucky  
• Pineal

Multiple Choice

What type of neuron is A?

• Sensory

• Inter

• Motor

Reflexes

Reflexes keep the body safe

They allow us to react to changes in our environment that could cause us harm

eg. shining a bight light in your eyes, touching a hot pan, stepping on a pin

Reflex Arc

The reflex arc is used to explain how reflexes work

It involves specialised cells called neurones

There are two synapses here - two places where nerves meet

Synapses

Synapses are the gaps between neurones.

They allow electrical impulses to pass from one neurone to the next

Synapses

• An electrical signal travels down the first neurone to the synapse

• It triggers a chemical (neurotransmitter) to be released

• This chemical binds to receptors on the second neurone

• It triggers an electrical signal to continue down the second neurone

Reflex Arc

• Receptors detect pain or a strong stimulus

• Signal travels along sensory neurone to closest part of the CNS

• Crosses a synapse to the relay neurone

• Crosses a synapse to a motor neurone

• Sends signal down motor neurone to move a muscle or release a hormone

Multiple Select

Select all the actions which are reflexes

• Sneezing from dust

• Pupil contracting from a bright light

• Goal keeper catching a ball

• Braking in a car if someone steps out in front of you

• Shooting at a target