Nervous System – Vdyamrit

Q: What is the nervous system?
A: The nervous system is the body’s control center, responsible for sending and receiving signals to and from different body parts.
Q: What are the main parts of the nervous system?
A: The brain, spinal cord, and nerves.
Q: What is the function of the nervous system?
A: To control and coordinate the body’s activities and respond to changes inside and outside the body.
Q: What is a nerve?
A: A bundle of nerve fibers that transmit signals between the brain, spinal cord, and the rest of the body.
Q: What are neurons?
A: Neurons are nerve cells that transmit electrical signals throughout the nervous system.
Q: What is the brain?
A: The brain is the control center of the body that processes information and controls functions.
Q: What is the spinal cord?
A: A long, thick bundle of nerves that connects the brain to the rest of the body.
Q: What is a reflex?
A: An automatic and quick response to a stimulus.
Q: How does the nervous system communicate?
A: Through electrical impulses and chemical signals.
Q: What is the role of sensory nerves?
A: To carry messages from the sense organs to the brain.

Q: What are the three main parts of the brain?
A: The cerebrum, cerebellum, and brainstem.
Q: What does the cerebrum do?
A: It controls thinking, memory, emotions, and voluntary movements.
Q: What does the cerebellum control?
A: Balance, coordination, and fine motor skills.
Q: What is the function of the brainstem?
A: It controls involuntary actions like breathing and heartbeat.
Q: What protects the brain?
A: The skull and cerebrospinal fluid.
Q: How is the spinal cord protected?
A: By the vertebrae (backbone).
Q: What happens if the spinal cord gets injured?
A: It can lead to loss of movement or sensation in parts of the body.
Q: What connects the brain to the spinal cord?
A: The brainstem.
Q: What are cranial nerves?
A: Nerves that emerge directly from the brain and control head and neck functions.
Q: What are spinal nerves?
A: Nerves that emerge from the spinal cord and control the rest of the body.

Q: What are motor nerves?
A: Nerves that carry messages from the brain to muscles for movement.
Q: What are mixed nerves?
A: Nerves that carry both sensory and motor signals.
Q: What are sensory nerves?
A: Nerves that carry information from sense organs to the brain.
Q: What is a synapse?
A: A tiny gap between two neurons where signals are transmitted.
Q: What are dendrites?
A: Branch-like structures that receive signals from other neurons.
Q: What is an axon?
A: A long, thin structure that carries impulses away from the neuron’s cell body.
Q: What are neurotransmitters?
A: Chemicals that transmit signals across a synapse.
Q: What is the peripheral nervous system (PNS)?
A: The part of the nervous system that includes all the nerves outside the brain and spinal cord.
Q: What is the central nervous system (CNS)?
A: The part of the nervous system that includes the brain and spinal cord.
Q: What is a nerve impulse?
A: An electrical signal that travels along a neuron.

Q: What part of the brain controls balance?
A: The cerebellum.
Q: Which nerves help us feel pain?
A: Sensory nerves.
Q: How fast can a nerve impulse travel?
A: Up to 120 meters per second.
Q: What are involuntary actions?
A: Actions that happen without conscious control, like heartbeat and digestion.
Q: Why is the nervous system important?
A: It helps the body respond to changes and controls essential functions.
Q: How do reflexes protect the body?
A: By responding quickly to danger without waiting for the brain’s instructions.
Q: What part of the brain helps us learn and think?
A: The cerebrum.
Q: What are the tiny electrical signals that neurons use?
A: Nerve impulses.
Q: Why is the nervous system compared to a telephone network?
A: Because it transmits messages throughout the body, just like a network sends calls.
Q: How does the brain know when something is hot?
A: Sensory nerves send signals from the skin to the brain.

VDYAMRIT