Nervous System Organisation
Do afferent neurons transmit signals towards or away from the CNS?
Towards the CNS
What does CNS and PNS stand for?
Central Nervous System & Peripheral Nervous System
Do dendrites receive or transmit signals?
Receive signals
What does RMP stand for?
Resting membrane potential
In which body compartment is [K+] high?
ICF
Are the motor fibres of the Somatic Nervous System voluntary or involuntary?
Voluntary
What two structures make up the CNS?
Brain and Spinal Cord
Is the axon hillock closer to the cell body or to the axon terminal?
The cell body
In mV, what is the RMP of most cells?
-70mV
In which body compartment is [Na+] high?
ECF
Name a type of muscle included in the Autonomic Nervous System.
Cardiac muscle or smooth muscle
Out of the Sensory division and Motor division; which is afferent and which is efferent?
Sensory division: afferent
Motor division: efferent
The region where an axon and a dendrite meet to pass a signal is called?
A synapse
What pump helps maintain the RMP?
Na+/K+ ATPase pump
True or false:
At the cell membrane the charge is more positive on the inside and more negative on the outside.
False.
Which system is: the 'communication lines' between the CNS and the rest of the body?
The PNS
Out of the Sympathetic division and Parasympathetic division, which is known as the 'rest and digest' and which is the 'fight or flight'.
Sympathetic division: fight or flight
Parasympathetic division: rest and digest
What are the chemicals transmitted between neurons called?
Neurotransmitters
What is the name of the equation that determines the equilibrium potential for a single specific ion?
The Nernst equation
What instrument is used to measure RMP?
A voltmeter
What are the three broad components of the nervous system?
Sensory input/sensors
Integration/processing
Motor output/effectors
What are the two divisions of the Motor division?
Somatic Nervous System & Autonomic Nervous System
At the synapse, what is the difference between a presynaptic cell and a postsynaptic cell?
Presynaptic cell: The cell that sends or delivers the signal.
Postsynaptic cell: The cell that receives the signal.
What is the equilibrium potential for Na+ in mV?
+60 mV
What is the equilibrium potential for K+ in mV?
-90mV