C03 - The Nervous System Flashcards
The basic component of the Nervous System is a cell called?
A Neuron.
Define an Axon?
The means of carrying signals to a distant cell.
What are the two types of Neurons?
- Motor Neuron.
- Sensory Neuron.
‘____’ carry signals from the brain?
Motor Neurons.
‘____’ carry signals from various parts of the body?
Sensory Neurons.
Neurons transmit ‘____’ as a series of ‘____’ travelling along the length of the ‘____’ (3)?
- Signals.
- Electrical Pulses/Waves.
- Axon.
What kind of process is Nerve Signalling?
Electro-Chemical.
What’s the speed of transmission in Neurons?
0.5 metres per second.
What’s the speed of transmission in Long Motor Neurons?
100 metres per second.
Name the two parts of the Nervous System?
- Central Nervous System.
- Peripheral Nervous System.
What does the CNS comprise of?
Brain and Spinal Chord.
Name the fluid which fills the spaces between the Skull and Brain and the Spinal Chord and its purpose (2)?
- Cerebrospinal Fluid.
- Supports and protects the Brain from shocks.
Name the three divisions of the PNS?
- Somatic Nervous System.
- Autonomic Nervous System.
- Enteric Nervous System.
What is the Somatic Nervous System responsible for?
Body movement and sensing the external stimuli.
What is the Autonomic Nervous System responsible for?
Operations of internal organs and control of blood supply.
Name the two divisions in the Autonomic Nervous System?
- Sympathetic Division.
- Parasympathetic Division.
What are the responsibilities of the Sympathetic and Parasympathetic Divisions (2)?
- Sympathetic is responsible for preparing the body for action.
- Parasympathetic is responsible for returning the body back to normal.
What is the Enteric Nervous System responsible for?
Controls the activities and functions of the gut.
Where are Proprioceptors located?
Inside the muscles.
Where are the Mechanoreceptors located?
Inside the tendons.
What are Pressure Receptors?
Sense how much pressure is being exerted on the surface of the body.
What is the Endocrine System?
A chemical messenger system which is secreted into the blood stream.
