Chapter 1+2 Behavioral Psychology
An action potential
A brief, rapid reversal of the neuron's potential from -70mV to +30 or +40mV and back indicates
Opens potassium channels
An IPSP will be produced when a neurotransmitter
Modulate neurotransmitter release
Autoreceptors would be expected to ______.
postsynaptic responses, transmitted decrementally, depolarizations, and graded potentials
EPSPs are
the sensory neurons involved fire at different rates
If somebody lightly touches you on the arm, or hits you hard in the same place, how does the brain know the difference?
sodium-potassium pump
In a resting neuron, which force pushes potassium ions into the cell?
At the axon hillock, the first step in initiating an action potential is that voltage-gated ____ ion channels must _____.
Na+; open
the absolute refractory period is typically about 1 millisecond
Neurons do not normally fire more than 1,000 times per second because
Influx of calcium ions into the axon terminal
Neurotransmitter release from the presynaptic membrane is triggered by the
sodium ion channels
Tetrodotoxin is a deadly poison because it blocks:
acetylcholinesterase
The enzyme whose function is to deactivate a specific neurotransmitter once it has been released into the synapse is
is negatively charged relative to the outside
The interior of a neuron at rest
Soma
The nucleus of the nerve cell is located within the
the type of receptor it stimulates
The type of postsynaptic potential produced by a neurotransmitter depends on
Existing genes become more or less active.
What do researchers think occurs with genes during aging?
Electricity
What force did physiologists Galvani and Helmholtz show was responsible for animation of the body?
The AP is a brief electrical signal The AP is conducted along the axon membrane The AP is conducted faster in myelinated nerve cells The AP is an all-or-none electrical event
Which of the following are true regarding the action potential (AP)?
radial glia
Which of the following is a type of glia that helps new neurons reach their final destination in the brain?
They contain specialized protein channels
Which of the statements about cell membranes is correct?
the sodium-potassium pump
Which part of the neuron works less due to myelination reducing the places where sodium can enter a neuron?
The model shows how nature and nurture interact to produce a characteristic or disorder.
Which statement below is true of the vulnerability model?
Glutamate
Which substance is the principal "excitatory" neurotransmitter in the brain?
Oligodendrocytes
_______ are the cells that provide insulation to the axons of neurons in the brain.
Sensory
________ neurons gather information from the environment related to light, odors, and bodily contact with objects.