12 Questions
What are the standard anatomical parts of a neuron?
Soma, dendrite, axon; soma contains the nucleus, dendrites receive signals, and axons send signals
What is the sequence of events that takes place when a neuron fires?
Depolarization, repolarization, hyperpolarization; depolarization is the neuron firing, followed by repolarization and then hyperpolarization
What is the role of hyperpolarization in propagating a nerve impulse?
Hyperpolarization helps in reducing the neuron's excitability after firing
What is the difference between EPSPs and IPSPs in typical nerve function?
EPSPs increase membrane potential while IPSPs decrease it
What are the components of the peripheral nervous system?
Nerves outside the brain and spinal cord
How do reflex arcs work?
Reflex arcs bypass the brain and directly produce a rapid response to a stimulus
What is the primary function of ligand-gated channels in propagating a nerve impulse?
Allowing ions to flow in response to neurotransmitter binding
How do EPSPs differ from IPSPs in the context of typical nerve function?
EPSPs increase the likelihood of a neuron firing, while IPSPs decrease it
In neuron function, what role do potassium channels primarily play?
Restoring the resting membrane potential after an action potential
What distinguishes the autonomic nervous system from the somatic nervous system?
Involuntary control of internal organs vs voluntary control of skeletal muscles
What is the main function of hyperpolarization in propagating a nerve impulse?
Preventing further action potentials from occurring immediately after one
How do sympathetic and parasympathetic nervous systems differ in their effects on body functions?
Sympathetic prepares the body for fight or flight responses, parasympathetic conserves energy and promotes digestion
Test your knowledge on the nervous system by answering questions on neuron anatomy, types of neurons, and the firing process. Explore how nervous system complexity has evolved across animal phyla and understand the roles of potassium channels, sodium channels, and sodium-potassium pumps in neuron function.
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