Which of the following is true of spatial summation?
a.
simultaneous stimulation of more than one postsynaptic neuron occurs
b.
impulses are fired in a rapid succession by the same neuron
c.
neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron
d.
speed of impulse transmission is increased when several neurotransmitters are released
Answer: C
Learn More :
Nervous System
- Nerves that contain mostly afferent fibers are called:
- A multipolar neuron contains:
- Dendrites conduct impulses:
- Axons and dendrites are classified as:
- Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)?
- Which of the following neurotransmitters is not associated with the states of depression and mania?
- A lack of this/these neurotransmitter(s) in the basal ganglia is/are associated with Parkinson's disease.
- Severe depression can be caused by a deficit in certain brain synapses of:
- The neurotransmitters in the brain that affect learning, motor control, and emotions are:
- The main chemical classes of neurotransmitters include all the following except:
- Neurotransmitters are released in a synapse and bind to:
- Serotonin is an example of a(n):
- Which of the following is not one of the main chemical classes of neurotransmitters?
- There are approximately different neurotransmitters in the brain and spinal cord.
- In order for a neurotransmitter to produce an inhibitory postsynaptic potential, which of the following channels must open?
- When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called:
- Excitatory neurotransmitters are most likely to:
- When an impulse reaches a synapse:
- A synaptic knob would be located on a(n):
- A synapse consists of:
- During a relative refractory period:
- The only ion(s) that can diffuse across a neuron's membrane when the neuron is at rest is/are:
- Compared to the inside of the cell membrane, the outside of most cell membranes is:
- Which is true of an action potential?