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VCE Psychology Unit 1 Questions and Answers
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Two main divisions of the human nervous system are: Ans: Central
nervous system (CNS)
Peripheral nervous system (PNS)
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Two major functions of the CNS Ans: 1. Receive sensory information from
the body (via the PNS) and send them to the brain for processing.
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2. Receive motor information from the brain and send to relevant parts
of the body (via PNS)
Two major functions of the PNS Ans: 1. Carry information from the
sensory and internal organs to the CNS.
2. Carry information from the CNS to sensory and internal organs.
Two divisions of the PNS Ans: - Somatic nervous system
- Autonomic nervous system
Role of the somatic NS Ans: ALL VOLUNTARY MOVEMENTS
Receives sensory information and controls bodily movements in
response.
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Role of the autonomic NS Ans: ALL INVOLUNTARY/AUTOMATIC
OPERATIONS
eg. heartbeat, organs, glands.
Operate independently of the brain.
Two divisions of the autonomic NS Ans: - Sympathetic NS
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- Parasympathetic NS
Role of the sympathetic NS Ans: Increasing the activity of involuntary
operations
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eg. increased heartbeat, sweating
Occurs during intense exercise, stress or threat.
Role of the parasympathetic NS Ans: Reducing or calming the activity of
involuntary operations.
Occurs to bring the individual back to homeostasis.
Role of the neuron Ans: To carry information as action potential
between neurons / interpret the message and enable a response.
Three types of neurons Ans: - sensory (feeling) neurons
- motor (moving) neurons
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- interneurons (connecting)
Afferent vs efferent neurons Ans: Afferent = sensory
Efferent = motor
Soma (cell body) Ans: The structure that determines whether a neuron
will be activated.
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Dendrite Ans: Detect and receive nerual infromation
Axon Ans: Transmits messages from the soma (cell body) to other cells in
the body.
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Myelin sheath Ans: A white fatty substance that helps speed up and
protect the transmission of neural information
Axon terminals Ans: Branches at the end of each axon in which the
message passes through.
Axon terminal buttons Ans: Buttons at the end of axon terminals that
store neurotransmitters and assist in the transmission of neural
information.
Structures in the hindbrain Ans: Cerebellum
Medulla
Part of reticular formation