Podcast
Questions and Answers
What is the main function of the nervous system?
What is the main function of the nervous system?
- Aiding in digestion
- Regulating body temperature
- Producing hormones and enzymes
- Coordinating actions and transmitting signals (correct)
Which part of the nervous system consists of the brain and spinal cord?
Which part of the nervous system consists of the brain and spinal cord?
- Peripheral nervous system (PNS)
- Central nervous system (CNS) (correct)
- Autonomic nervous system
- Somatic nervous system
What are the nerves that transmit signals from the brain called?
What are the nerves that transmit signals from the brain called?
- Autonomic nerves
- Motor nerves or efferent nerves (correct)
- Sensory nerves or afferent nerves
- Mixed nerves
When did nervous tissue first arise in wormlike organisms?
When did nervous tissue first arise in wormlike organisms?
What is the function of the peripheral nervous system (PNS)?
What is the function of the peripheral nervous system (PNS)?
What is the main function of the peripheral nervous system (PNS)?
What is the main function of the peripheral nervous system (PNS)?
What are spinal nerves primarily responsible for?
What are spinal nerves primarily responsible for?
Which part of the nervous system primarily responds to environmental changes?
Which part of the nervous system primarily responds to environmental changes?
What do motor nerves primarily do?
What do motor nerves primarily do?
In vertebrates, what does the central nervous system (CNS) consist of?
In vertebrates, what does the central nervous system (CNS) consist of?
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Study Notes
Nervous System Overview
- The main function of the nervous system is to control and coordinate the body's functions and responses.
Central Nervous System (CNS)
- The CNS consists of the brain and spinal cord.
- In vertebrates, the CNS consists of the brain and spinal cord.
Nerve Types
- The nerves that transmit signals from the brain are called motor nerves.
- Motor nerves primarily transmit signals from the brain to muscles and glands.
- Spinal nerves are primarily responsible for transmitting signals between the CNS and the rest of the body.
Evolution of Nervous System
- Nervous tissue first arose in wormlike organisms around 500-600 million years ago.
Peripheral Nervous System (PNS)
- The main function of the PNS is to connect the CNS to the rest of the body.
- The PNS primarily responds to environmental changes and transmits signals to and from the CNS.
Functions of Nervous System
- The nervous system plays a crucial role in controlling and coordinating the body's functions and responses.
- The CNS primarily responds to internal changes and maintains homeostasis.
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