25 Questions
What are the three functions of the nervous system?
Sensory input, Information integration, Motor output
What is the PNS and what does it include?
Peripheral nervous system, includes spine and has both motor and sensory parts
What are Schwann cells and what do they do?
Cells that form the myelin sheath to insulate axons
What ions are important for signal transmission?
Sodium and Potassium (K+ and Na+)
What do gated ion channels do?
Allow flow of Na+ and cause the membrane potential to become less negative
What is depolarization?
When membrane potential becomes less negative due to the flow of Na+
What are the functional units of the nervous system?
Neurons and Schwann cells
What is the CNS and what does it include?
Central nervous system, includes spine and the brain
What does the afferent part of the PNS do?
It is for sensory
What is the threshold and what happens when you go above the threshold?
The level of depolarization required for an action potential to occur; an action potential is initiated
What are the phases involved in an action potential?
Depolarization, repolarization, and undershoot
What is the function of the sensory division of the nervous system?
Detect stimuli and send action potentials to the brain for processing
What is the role of sensory receptors in the nervous system?
Convert energy from stimuli into action potentials
Which division of the peripheral nervous system is responsible for involuntary bodily functions?
Autonomic division
What is the primary function of the synapse in neural physiology?
To serve as a neural junction for electrical and chemical transmission
What is the final step in the process of sensory perception?
Perception, the brain's interpretation of sensations
Where does the nervous system receive information about stimulus intensity and presence/absence?
Complex organs housing receptors
What initiates the creation of sensations in the nervous system?
Nerve impulses sent to the brain due to stimuli detection
What is the primary function of the nervous system in relation to stimuli detection?
Inform about stimulus intensity and presence/absence
What is the main process through which receptors in the nervous system convert stimuli into action potentials?
Reception, transduction, amplification, transmission, and integration
Explain the process of action potential and the phases involved.
The action potential is triggered by depolarization above a certain threshold. It involves depolarization, repolarization, and undershoot phases.
Describe the functions and types of synapses in neural physiology.
Synapse is a neural junction, with electrical and chemical kinds. It serves the function of transmitting signals between neurons.
What are the functions of sensory receptors in the nervous system? Explain the process of converting stimuli into action potentials.
Sensory receptors have reception, transduction, amplification, transmission, and integration functions. They convert energy from stimuli into action potentials.
Explain the role of the peripheral nervous system in sensory perception and the divisions it includes.
The peripheral nervous system includes afferent, efferent, autonomic, and somatic divisions. The sensory division detects stimuli and sends action potentials to the brain for processing.
Discuss the process of perception and the relationship between sensations and perceptions.
Sensations are nerve impulses sent to the brain due to stimuli detection. Perception is the brain's interpretation of sensations.
Study Notes
Neural Physiology and Sensory Perception
- Action potential is triggered by depolarization above a certain threshold
- Action potential involves depolarization, repolarization, and undershoot phases
- Action potential travels through sodium influx, depolarization, and repolarization
- Synapse is a neural junction, with electrical and chemical kinds
- Peripheral nervous system includes afferent, efferent, autonomic, and somatic divisions
- Sensory division detects stimuli and sends action potentials to the brain for processing
- Brain processes action potentials to create perceptions
- Sensations are nerve impulses sent to the brain due to stimuli detection
- Perception is the brain's interpretation of sensations
- Sensory receptors have reception, transduction, amplification, transmission, and integration functions
- Receptors convert energy from stimuli into action potentials
- Nervous system informs about stimulus intensity and presence/absence, with receptors located in complex organs
Neural Physiology and Sensory Perception
- Action potential is triggered by depolarization above a certain threshold
- Action potential involves depolarization, repolarization, and undershoot phases
- Action potential travels through sodium influx, depolarization, and repolarization
- Synapse is a neural junction, with electrical and chemical kinds
- Peripheral nervous system includes afferent, efferent, autonomic, and somatic divisions
- Sensory division detects stimuli and sends action potentials to the brain for processing
- Brain processes action potentials to create perceptions
- Sensations are nerve impulses sent to the brain due to stimuli detection
- Perception is the brain's interpretation of sensations
- Sensory receptors have reception, transduction, amplification, transmission, and integration functions
- Receptors convert energy from stimuli into action potentials
- Nervous system informs about stimulus intensity and presence/absence, with receptors located in complex organs
Test your knowledge of neural physiology and sensory perception with this quiz. Explore topics such as action potential, synapses, peripheral nervous system, sensory divisions, sensations, perceptions, and sensory receptors. Sharpen your understanding of how the nervous system processes stimuli and creates perceptions.
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