Neural Physiology and Sensory Perception Quiz

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Questions and Answers

What are the three functions of the nervous system?

Sensory input, Information integration, Motor output (correct)

Detection, Analysis, Response

Reception, Transmission, Coordination

Perception, Cognition, Action

What is the PNS and what does it include?

Peripheral neuron system, includes brain and spinal cord

Peripheral neural system, includes cranial nerves and autonomic ganglia

Peripheral neuro system, includes sensory nerves and motor nerves

Peripheral nervous system, includes spine and has both motor and sensory parts (correct)

What are Schwann cells and what do they do?

Support cells for interneurons

Cells that form the myelin sheath to insulate axons (correct)

Cells responsible for synaptic plasticity

Neural cells that aid in neurotransmitter release

What ions are important for signal transmission?

Sodium and Potassium (K+ and Na+) Signup and view all the answers

What do gated ion channels do?

Allow flow of Na+ and cause the membrane potential to become less negative Signup and view all the answers

What is depolarization?

When membrane potential becomes less negative due to the flow of Na+ Signup and view all the answers

What are the functional units of the nervous system?

Neurons and Schwann cells Signup and view all the answers

What is the CNS and what does it include?

Central nervous system, includes spine and the brain Signup and view all the answers

What does the afferent part of the PNS do?

It is for sensory Signup and view all the answers

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 Signup and view all the answers

What are the phases involved in an action potential?

Depolarization, repolarization, and undershoot Signup and view all the answers

What is the function of the sensory division of the nervous system?

Detect stimuli and send action potentials to the brain for processing Signup and view all the answers

What is the role of sensory receptors in the nervous system?

Convert energy from stimuli into action potentials Signup and view all the answers

Which division of the peripheral nervous system is responsible for involuntary bodily functions?

Autonomic division Signup and view all the answers

What is the primary function of the synapse in neural physiology?

To serve as a neural junction for electrical and chemical transmission Signup and view all the answers

What is the final step in the process of sensory perception?

Perception, the brain's interpretation of sensations Signup and view all the answers

Where does the nervous system receive information about stimulus intensity and presence/absence?

Complex organs housing receptors Signup and view all the answers

What initiates the creation of sensations in the nervous system?

Nerve impulses sent to the brain due to stimuli detection Signup and view all the answers

What is the primary function of the nervous system in relation to stimuli detection?

Inform about stimulus intensity and presence/absence Signup and view all the answers

What is the main process through which receptors in the nervous system convert stimuli into action potentials?

Reception, transduction, amplification, transmission, and integration Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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