#1
Which part of the nervous system is responsible for voluntary movements?
Somatic nervous system
ExplanationVoluntary movements are controlled by the somatic nervous system.
#2
Which cells in the nervous system are responsible for producing myelin in the central nervous system?
Oligodendrocytes
ExplanationOligodendrocytes produce myelin in the CNS.
#3
What is the main function of the axon in a neuron?
To transmit signals to other neurons or muscles
ExplanationThe axon transmits signals to other neurons or muscles.
#4
The sympathetic and parasympathetic nervous systems are subdivisions of which larger system?
Autonomic nervous system
ExplanationThey are subdivisions of the autonomic nervous system.
#5
Which part of the neuron is responsible for receiving information from other neurons?
Dendrites
ExplanationDendrites receive information from other neurons.
#6
What is the primary function of the myelin sheath?
To speed up the transmission of nerve impulses
ExplanationMyelin sheath accelerates nerve impulse transmission.
#7
Which neurotransmitter is primarily involved in the sympathetic nervous system's response to stress?
Norepinephrine
ExplanationNorepinephrine is central to the sympathetic response to stress.
#8
What type of ions primarily initiate the action potential in a neuron?
Sodium (Na+)
ExplanationSodium ions (Na+) mainly initiate neuron action potentials.
#9
Which part of the brain is critically involved in forming new memories?
Hippocampus
ExplanationThe hippocampus plays a key role in memory formation.
#10
Which of the following neurotransmitters is primarily involved in the regulation of mood and emotional behavior?
Serotonin
ExplanationSerotonin primarily regulates mood and emotions.
#11
The blood-brain barrier (BBB) is most permeable to which of the following?
Gases like O2 and CO2
ExplanationThe BBB is highly permeable to gases such as O2 and CO2.
#12
Which area of the brain is primarily responsible for the regulation of homeostasis?
Hypothalamus
ExplanationThe hypothalamus regulates homeostasis.
#13
The resting potential of a typical neuron is closest to:
-70 mV
ExplanationThe resting potential of a neuron is approximately -70 mV.
#14
Which of the following is NOT a function of the autonomic nervous system?
Controlling voluntary movements
ExplanationAutonomic nervous system does not control voluntary movements.
#15
What is the significance of synaptic plasticity in the nervous system?
It describes changes in the synaptic strength between neurons, underlying learning and memory.
ExplanationSynaptic plasticity underlies learning and memory through synaptic strength changes.