Podcast
Questions and Answers
What is the primary role of the sensory function of the nervous system?
What is the primary role of the sensory function of the nervous system?
- To transmit electrical signals
- To initiate muscle contractions
- To make decisions based on previous knowledge
- To detect stimuli from the environment (correct)
Which component is NOT part of the Peripheral Nervous System (PNS)?
Which component is NOT part of the Peripheral Nervous System (PNS)?
- Spinal cord (correct)
- Cranial nerves
- Spinal nerves
- Motor nerves
What is the function of neurons in the nervous system?
What is the function of neurons in the nervous system?
- To transmit electrical signals (correct)
- To detect external stimuli
- To control skeletal muscle movements
- To process sensory information
Which of the following accurately describes the integrative function of the nervous system?
Which of the following accurately describes the integrative function of the nervous system?
What occurs during the processing stage in the nervous system?
What occurs during the processing stage in the nervous system?
How does corticalization relate to the development of the nervous system?
How does corticalization relate to the development of the nervous system?
What characterizes encephalization in the context of evolutionary biology?
What characterizes encephalization in the context of evolutionary biology?
Which statement about the pathway of information in the nervous system is accurate?
Which statement about the pathway of information in the nervous system is accurate?
Flashcards
What are the functions of the nervous system?
What are the functions of the nervous system?
The nervous system is responsible for three main functions: 1. Sensory function: detecting internal and external stimuli. 2. Motor function: reacting to stimuli by controlling muscles or glands. 3. Integrative function: processing information, making decisions, and integrating it with past experiences.
What are the components of the Central Nervous System (CNS)?
What are the components of the Central Nervous System (CNS)?
The Central Nervous System consists of the brain and the spinal cord. It's like the command center of the nervous system.
What is the Peripheral Nervous System (PNS)?
What is the Peripheral Nervous System (PNS)?
The Peripheral Nervous System includes all the nerves that extend from the brain and spinal cord to the rest of the body. It's like the network of cables that connect the command center (CNS) to different parts of the body.
What is a neuron?
What is a neuron?
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What is the role of dendrites in a neuron?
What is the role of dendrites in a neuron?
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What does an axon do?
What does an axon do?
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How does information flow in the nervous system?
How does information flow in the nervous system?
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What are the concepts of corticalization and encephalization?
What are the concepts of corticalization and encephalization?
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Study Notes
Nervous System
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Evolutionary Development: Major developments in nervous system evolution include encephalization (brain development) and the development of the cerebral hemispheres.
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Corticalization: The cerebral cortex is the outer layer of the brain, responsible for higher-level functions. Neurons in the brain form connections with the cerebral cortex.
Sensory Function
- Sensory Function: Detects internal and external stimuli.
Motor Function
- Motor Function: Initiates reactions to stimuli via muscular or glandular secretions.
Integrative Function
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Integrative Function: This function includes perception, analysis, decision-making, and correlation with previously acquired information.
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Spinal Cord: Information is transmitted to and from central nervous system (CNS).
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Cranial Nerves: 12 pairs emerge from the brain.
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Neurons: Have a complex structure with cell bodies as a source of information and axons that transmit impulses.
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Neuron Function: Neurons communicate through electrical and chemical signals.
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Myelin: Speeds up impulse transmission.
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Synapse: A junction where neurons communicate, involves release of neurotransmitters.
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White vs Grey Matter: White matter contains myelinated axons; gray matter contains cell bodies and dendrites.
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CNS: Includes the encephalon and spinal cord.
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PNS: Comprises nerves and ganglia extending outward from the CNS.
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CNS Function: Processing of sensory information.
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Communication: Communication is rapid and efficient via myelin and neuron pathways.
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Energy Consumption: Neurons consume approximately 20% of oxygen used by the body.
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