18 Questions
What is the function of neurons in the nervous system?
Receive and transmit nerve impulses
Which of the following ions is more abundant inside the axon during resting potential?
K+
In a myelinated axon, where are action potentials only produced?
At the nodes of Ranvier
Which of the following neurotransmitters is associated with feelings of reward and pleasure?
Dopamine
What type of channels cause changes in membrane permeability in response to neurotransmitters?
Ligand-gated (chemically-gated) channels
What is the central coordinating unit of the nervous system that includes the brain and spinal cord?
Central nervous system (CNS)
Which lobe of the cerebrum is responsible for the primary auditory functions?
Temporal lobe
Which part of the brain plays a key role in homeostasis by controlling hunger, sleep, thirst, and body temperature?
Hypothalamus
What is the function of the limbic system in the brain?
Joins emotions with higher functions
Which part of the brain integrates eye, ear, joint, and muscle information?
Cerebellum
What is the function of the Reticular Activating System (RAS) in the brain?
Regulates alertness
Which division of the Peripheral Nervous System controls involuntary responses like reflexes?
Autonomic Division
What is the main function of neuroglia in the nervous system?
Providing support and protection for neurons
During the action potential of a neuron, what happens when potassium gates open?
Potassium ions flow out of the axon, causing repolarization
Which type of synapse involves a direct connection between two cells through gap junctions?
Electrical synapse
What is the primary factor that affects the velocity of nerve impulse transmission in neurons?
The diameter of the axon
What is synaptic integration in neurons?
The summation of inhibitory and excitatory signals received by a neuron
Which division of the nervous system includes nerves and ganglia?
Peripheral nervous system (PNS)
Test your knowledge about the nervous system, including topics like receiving and responding to stimuli, communication between cells, and the two main cell types: neurons and neuroglia. You'll also tackle concepts related to the nerve impulse, including resting potential, action potential, sodium gates, and ion flow.
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