TOPICS 1-3 The Nervous System Flashcards
An impulse from one nerve cell is communicated to another nerve cell via the
synapse
Communication across a synapse involves the release of:
neurotransmitters
In the neuron, the dendrites are the parts that:
receive stimuli from the environment or from other other neurons
The Moro reflex is usually present until about:
4-5 months of age
Accidentally touching the hot burner of a stove will elicit a(n) __________ reflex
withdrawal
Nerves that carry impulses from the CNS are:
efferent nerves
The sodium-potassium exchange pump requires what to function?:
ATP
Spinal nerves are:
Sensory
Motor
Mixed
None of these
mixed
Nerves that carry impulses toward the CNS are:
afferent nerves
The membrane potential found across the membrane of all living cells is maintained by:
the sodium–potassium pump
What function does myelin perform?
Increases the speed of impulse conduction
A synapse is a specialised site where cell to cell _______ ___________ takes place
chemical communication
The stretch reflex is important in regulating what?
is important in regulating posture
The last step in the activation of a reflex arc is the:
response of a muscle.
The first step in the activation of a reflex arc is the:
activation of a sensory receptor.
What is the correct sequence for a simple spinal reflex arc?
receptor, afferent neuron, integration centre, efferent neuron, effector
The part of a neuron that conducts impulses away from its cell body is called the:
axon