2.2a Nerve system Flashcards
Name the 2 parts of the human central nerve system
The brain and the spinal cord
Describe the role of the CNS in humans
to sort out stimulus received from receptors and sends electrical impulse messages along nerves to effectors
Describe how information is passed along a neuron
through electrical impulses
State how neurons are linked in the nervous system
by the synapse
State the general function of receptors as part of the nervous system
they convert stimuli to electrical impulses
Give the importance of the rapid reflex action in humans
to protect the body from harm
Name the three main regions of the brain
the cerebrum, the cerebellum and the medulla
Describe the function of the cerebellum
cerebellum = controls balance
Describe the function of the medulla
medulla = controls breathing and heart rate
Describe the function of the cerebrum
the site of emotions, memory and thoughts
Name the three types of neurons in the nervous system
The inter neuron, the sensory neuron and the motor neuron
What is the role of the inter neuron
Inter neurons carry impulses from sensory neurons to the motor neurons
What is the role of the sensory neuron
Sensory neurons carry impulses from receptors to the CNS/inter neurons
What is the role of the motor neurons
Motor neurons carry impulses from the CNS/inter neuron to the effector
Describe what happens when an electrical signal arrives at a synapse
Chemicals are released from a neuron, chemical diffuse across synapse impulse created in next neuron
