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MBB2 > Neural Systems > Flashcards

Neural Systems Flashcards

0
Q

What makes up the CNS?

A

The brain and spinal cord

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1
Q

What is the basic unit of the nervous system?

A

A neuron

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2
Q

What is the fatty tissue around an axon called?

A

Myelin Sheath

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3
Q

What are the gaps in the fatty sheath around an axon called?

A

Node of Ranvier

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4
Q

Name the subdivisions of the autonomic CNS

A

Sympathetic and parasympathetic

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5
Q

Name the vertical positional terms of the brain

A 
Dorsal/superior = up
Ventral/inferior = down
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6
Q

Name the horizontal positional terms of the brain

A 
Rostral/anterior = front
Caudal/posterior = back
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7
Q

The lobe of the brain that is associated with visual processing is….?

A

The occipital lobe

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8
Q

Name the gap between two connecting neurons

A

The synaptic cleft

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9
Q

What is the electrical waveform of a neuron called?

A

An action potential

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10
Q

What is the electrical charge across the axial membrane in the absence of stimulation called?

A

Resting membrane potential

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11
Q

The likelihood that a neuron will fire an electrical signal given certain chemical and electrical properties, is known as…?

A

Neuronal excitability

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12
Q

Name two of the ions involved in generating and electrical postsynaptic signal

A

Sodium and potassium

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13
Q

The enteric nervous system is found where?

A

Embedded in the lining if the gastrointestinal system which functions independently from then PNS

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14
Q

What are afferent neurons?

A

Neurons that carry sensory information from receptors to CNS (one way)

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15
Q

What are efferent neurons?

A

Send motor commands to muscles

16
Q

What are the subdivisions of efferent signals?

A

Somatic and autonomic

17
Q

What is the sympathetic nervous system responsible for?

A

Fight and flight

18
Q

What is the parasympathetic nervous system responsible for?

A

Rest and digest

19
Q

What four areas make up the lambic system of the brain?

A

Cingulate gyrus
Thalamus
Hippocampus
Amygdala

20
Q

The central part of a neuron where protein synthesis occurs is called?

A

The cell body

21
Q

The nucleus contains what?

A

DNA/RNA

22
Q

What are the three types of neuron?

A

Unipolar
Bipolar
Multipolar

23
Q

What is a membrane potential?

A

Electrical voltage present across the cell membrane

24
Q

The resting potential of a neuron is what?

A

Voltage that is present in a neuron whether it is firing or not

25
Q

A resting neuron is said to be?

A

Polarised

26
Q

What are the 3 stages of an action potential?

A

Depolarising (peaking)
Repolarising (goes down)
Refractory (stops new AP’s being generated)

MBB2 (5 decks)

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