Human Physio Ch. 8 Question and
answers verified to pass 2025
Which of the following neurons or groups of neurons are NOT considered to
be a part of the efferent pathway? - correct answer Sensory
What is the collection of neurons in the walls of the digestive system called? -
correct answer Enteric nervous system
The sympathetic and parasympathetic nervous systems are divisions of which
system? - correct answer Autonomic nervous system
Nerve cells in the central nervous system are primarily - correct answer
Interneurons
he cells that we are capable of controlling consciously are the _____ neurons.
- correct answer Somatic motor (somatic efferent)
Somatic motor neurons control: - correct answer Skeletal muscles
The part of the neuron that receives most of the incoming signals is the
________. - correct answer Dendrite
The neurons of the central nervous system are also known as ________. -
correct answer Interneurons
Which glial cell produces myelin in the central nervous system? - correct
answer Oligodendrocytes
, The small space between the sending neuron and the receiving neuron is the:
- correct answer Synaptic Cleft
A molecule that carries information across a synaptic cleft is a: - correct
answer Neurotransmitter
When calcium ions enter the synaptic terminal, - correct answer they cause
vesicles containing neurotransmitter molecules to fuse to the plasma
membrane of the sending neuron.
When neurotransmitter molecules bind to receptors in the plasma membrane
of the receiving neuron, - correct answer ion channels in the plasma
membrane of the receiving neuron open.
If a signal from a sending neuron makes the receiving neuron more negative
inside, - correct answer the receiving neuron is less likely to generate an
action potential.
In most cells, the concentration of ions contributing to the membrane potential
are ________ in the intracellular fluid compared to the extracellular fluid, with
the exception of ________ ions. - correct answer Lower; potassium
During an action potential, activation of voltage-gated sodium and potassium
channels occurs at different rates. What is the effect of this difference on ion
flow across an axon membrane? - correct answer Initially, Na+ flows into the
cell followed by K+ flowing out of the cell.
What happens if a graded stimulus is of sufficient strength to reach threshold
at the trigger zone? - correct answer An action potential occurs
answers verified to pass 2025
Which of the following neurons or groups of neurons are NOT considered to
be a part of the efferent pathway? - correct answer Sensory
What is the collection of neurons in the walls of the digestive system called? -
correct answer Enteric nervous system
The sympathetic and parasympathetic nervous systems are divisions of which
system? - correct answer Autonomic nervous system
Nerve cells in the central nervous system are primarily - correct answer
Interneurons
he cells that we are capable of controlling consciously are the _____ neurons.
- correct answer Somatic motor (somatic efferent)
Somatic motor neurons control: - correct answer Skeletal muscles
The part of the neuron that receives most of the incoming signals is the
________. - correct answer Dendrite
The neurons of the central nervous system are also known as ________. -
correct answer Interneurons
Which glial cell produces myelin in the central nervous system? - correct
answer Oligodendrocytes
, The small space between the sending neuron and the receiving neuron is the:
- correct answer Synaptic Cleft
A molecule that carries information across a synaptic cleft is a: - correct
answer Neurotransmitter
When calcium ions enter the synaptic terminal, - correct answer they cause
vesicles containing neurotransmitter molecules to fuse to the plasma
membrane of the sending neuron.
When neurotransmitter molecules bind to receptors in the plasma membrane
of the receiving neuron, - correct answer ion channels in the plasma
membrane of the receiving neuron open.
If a signal from a sending neuron makes the receiving neuron more negative
inside, - correct answer the receiving neuron is less likely to generate an
action potential.
In most cells, the concentration of ions contributing to the membrane potential
are ________ in the intracellular fluid compared to the extracellular fluid, with
the exception of ________ ions. - correct answer Lower; potassium
During an action potential, activation of voltage-gated sodium and potassium
channels occurs at different rates. What is the effect of this difference on ion
flow across an axon membrane? - correct answer Initially, Na+ flows into the
cell followed by K+ flowing out of the cell.
What happens if a graded stimulus is of sufficient strength to reach threshold
at the trigger zone? - correct answer An action potential occurs
