Nervous System Quiz

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Questions and Answers

Which part of the nervous system is responsible for transmitting messages between the body and the brain?

  • Cerebellum
  • Brain
  • Spinal Cord
  • Nerves (correct)

What does the cerebrum primarily allow you to do?

  • Reason and problem solve (correct)
  • Control reflexes
  • Coordination of muscle movement
  • Regulate body temperature

Which lobe of the cerebrum is responsible for visual perception?

  • Occipital Lobe (correct)
  • Temporal Lobe
  • Parietal Lobe
  • Frontal Lobe

What function is primarily managed by the brain stem?

<p>Regulation of vital functions (A)</p> Signup and view all the answers

Which hemisphere of the brain controls the right side of the body?

<p>Left Hemisphere (D)</p> Signup and view all the answers

What role do the temporal lobes play in the brain's function?

<p>Emotional responses and hearing (D)</p> Signup and view all the answers

Which part of the nervous system is involved in receiving sensory information?

<p>Spinal Cord (D)</p> Signup and view all the answers

Which lobe of the cerebrum is most associated with motor functions?

<p>Frontal Lobe (D)</p> Signup and view all the answers

What is the primary function of the cerebellum?

<p>Facilitating muscle memory (C)</p> Signup and view all the answers

Which part of the brain acts as a relay center for sensory impulses?

<p>Thalamus (A)</p> Signup and view all the answers

Which structure connects the right and left hemispheres of the cerebrum?

<p>Corpus Collosum (B)</p> Signup and view all the answers

What function does the hypothalamus NOT regulate?

<p>Breathing rate (A)</p> Signup and view all the answers

Which part of the brainstem is responsible for relaying signals between the cerebellum and the cerebrum?

<p>Pons (A)</p> Signup and view all the answers

What is NOT a function of the hypothalamus?

<p>Controlling heart rate (A)</p> Signup and view all the answers

What structure lies just below the diencephalons?

<p>Midbrain (B)</p> Signup and view all the answers

What is primarily controlled by the brainstem?

<p>Digestive functions (C)</p> Signup and view all the answers

What functions does the medulla oblongata regulate?

<p>Heart beat, breathing, and blood pressure (D)</p> Signup and view all the answers

What is the main route connecting the brain with the peripheral nervous system?

<p>Spinal cord (A)</p> Signup and view all the answers

Which statement accurately describes ascending nerve tracts?

<p>They transmit information from the body to the brain. (C)</p> Signup and view all the answers

What substance is contained within the spinal cord that helps provide nutrients to nerve cells?

<p>Cerebrospinal fluid (C)</p> Signup and view all the answers

Which part of a neuron is responsible for receiving nerve impulses?

<p>Dendrites (B)</p> Signup and view all the answers

What is the role of the nucleus within a neuron?

<p>To control the cell and produce messages (D)</p> Signup and view all the answers

What is the primary function of descending nerve tracts?

<p>Deliver messages from the brain to the muscles and glands (B)</p> Signup and view all the answers

How many pairs of nerves are associated with the spinal cord?

<p>31 pairs (A)</p> Signup and view all the answers

What is the primary function of axons in the nervous system?

<p>Transmits impulses away from the cell body (B)</p> Signup and view all the answers

What role do motor neurons play in the nervous system?

<p>Connect to muscles and transmit information from the brain (D)</p> Signup and view all the answers

Which statement about synapses is correct?

<p>Synapses are gaps between neurons, muscles, or glands (A)</p> Signup and view all the answers

Where are interneurons primarily located?

<p>Only in the spinal cord and brain (A)</p> Signup and view all the answers

What do sensory impulses inform the nervous system about?

<p>Information from the five senses and internal conditions (D)</p> Signup and view all the answers

Which type of neuron is responsible for detecting external stimuli?

<p>Sensory neurons (D)</p> Signup and view all the answers

Which function is most closely associated with the brain remaining active even during sleep?

<p>Performing critical functions for body maintenance (B)</p> Signup and view all the answers

What distinguishes motor impulses from sensory impulses?

<p>Motor impulses control activities whereas sensory impulses provide information (A)</p> Signup and view all the answers

Which receptor is connected to the nervous system primarily through the optic nerve?

<p>Sight (B)</p> Signup and view all the answers

What type of sensory receptor is primarily responsible for detecting sound?

<p>Auditory receptors (A)</p> Signup and view all the answers

Which of the following senses is NOT directly associated with a specific nerve connection to the brain?

<p>Balance (D)</p> Signup and view all the answers

Which sensory receptor interacts with the external environment acting as a sensor?

<p>Receptors (B)</p> Signup and view all the answers

What connects the sense of smell to the nervous system?

<p>Olfactory nerve (C)</p> Signup and view all the answers

What is the primary function of the Central Nervous System (CNS)?

<p>Serves as the control center for the entire body (D)</p> Signup and view all the answers

Which nerve is responsible for transmitting taste information to the brain?

<p>Glossopharyngeal nerve (D)</p> Signup and view all the answers

Which statement is true regarding the sense of touch?

<p>It includes sensations of pain and pressure. (C)</p> Signup and view all the answers

Which of the following is NOT a part of the Peripheral Nervous System (PNS)?

<p>Brain (C)</p> Signup and view all the answers

What is the plural form of the term 'stimulus'?

<p>Stimuli (D)</p> Signup and view all the answers

What role does the autonomic system play in the nervous system?

<p>Regulates the body's internal environment (C)</p> Signup and view all the answers

What is the function of dendrites in a neuron?

<p>Receives impulses and transports them to the cell body (B)</p> Signup and view all the answers

Which response is associated with the release of adrenalin?

<p>Fight'or'flight response (A)</p> Signup and view all the answers

What is the sequence of sending a nerve impulse between neurons?

<p>Dendrites → cell body → axon → axon terminal → synapse (A)</p> Signup and view all the answers

What does the somatic system primarily help with?

<p>Adjusting the body to external stimuli (A)</p> Signup and view all the answers

Which of these best describes motor impulses?

<p>They send messages to coordinate voluntary actions (D)</p> Signup and view all the answers

Flashcards

What is the role of the brain?

The brain is the central control center, receiving sensory information from the spinal cord and nerves, and directing all bodily functions.

What is the function of the spinal cord?

The spinal cord acts as a communication highway, transferring sensory information from the body to the brain and vice versa.

What are nerves?

Nerves are bundles of specialized cells called neurons that transmit electrical impulses, carrying messages throughout the body.

What is the cerebrum responsible for?

The cerebrum is the largest part of the brain and is responsible for higher-level functions such as thinking, reasoning, memory, and language.

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What is the cerebellum responsible for?

The cerebellum is responsible for coordinating movements, balance, and posture. It ensures smooth and coordinated actions.

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What is the brain stem responsible for?

The brain stem controls essential functions such as breathing, heart rate, and blood pressure, keeping us alive!

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What is the frontal lobe responsible for?

The frontal lobe is responsible for planning, reasoning, and motor control, allowing us to perform voluntary movements.

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What is the parietal lobe responsible for?

The parietal lobe processes sensory information from the body, such as touch, taste, temperature, and pain.

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Cerebellum

Part of the brain responsible for coordinating movement, balance, and muscle memory.

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Cerebrum

The outer layer of the brain responsible for higher-level functions like thinking, learning, memory, and language.

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Corpus Callosum

A bundle of nerve fibers that connects the two hemispheres of the cerebrum, allowing them to communicate.

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Thalamus

A relay center for sensory information (except smell) that travels to the cerebrum.

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Hypothalamus

A region below the thalamus that regulates essential functions like sleep, hunger, thirst, body temperature, and homeostasis.

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Brain Stem

The part of the brain that connects the cerebrum and cerebellum to the spinal cord, controlling vital functions like breathing, heart rate, and digestion.

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Pons

A region of the brain stem that relays information between the cerebellum and cerebrum, and helps with motor control.

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Medulla Oblongata

The lowest part of the brain stem, responsible for controlling vital functions like breathing, heart rate, and blood pressure.

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What is the Medulla Oblongata?

Part of the brain that connects to the spinal cord, responsible for vital functions like heart rate, breathing, and blood pressure.

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What is the Spinal Cord?

The main pathway for communication between the brain and the rest of the body.

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What is the Cell Body of a Neuron?

The central part of a neuron, containing the nucleus and other structures.

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What is the Nucleus of a Neuron?

The control center of the cell, responsible for producing messages sent to the central nervous system.

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What are Dendrites?

Branch-like extensions of a neuron that receive nerve impulses and send them to the cell body.

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What are Axons?

Long, slender projections of a neuron that transmit nerve impulses from the cell body to other neurons, muscles, or glands.

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Synaptic Terminals

Transmit impulses to other neurons, muscles, or glands.

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Synapse

The junction between a neuron and another neuron, muscle, or gland.

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Sensory Neurons

Transmit information about stimuli to the brain.

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Motor Neurons

Transmit information from the brain to muscles and glands.

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Interneurons

Connect sensory and motor neurons, located only in the spinal cord and brain.

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Sensory Impulses

Messages taken in by the body that inform the nervous system about what's going on, both inside and outside the body.

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Motor Impulses

Messages sent from the brain to control activities.

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What is a synapse?

The junction where two neurons meet. It allows communication between neurons through neurotransmitters.

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What is a neuron?

A specialized cell that transmits nerve impulses, carrying messages throughout the nervous system.

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What is an axon?

Long, slender projections of a neuron that transmit nerve impulses from the cell body to other neurons, muscles, or glands.

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What is a stimulus?

A stimulus is something that can be detected by a sensory neuron. It can be anything from light to sound to touch.

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What are receptors?

Receptors interact with the external environment acting as sensors for different stimuli, enabling us to experience the world through our senses.

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What are the five senses?

The five senses are sight, hearing, smell, taste, and touch.

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Central Nervous System (CNS)

The control center for the entire body, consisting of the brain and spinal cord.

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Peripheral Nervous System (PNS)

The network of nerves that extend throughout the body, connecting the CNS to the rest of the body.

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Somatic System

The part of the PNS that helps the body adjust to the external environment, including 12 pairs of cranial nerves and 31 pairs of spinal nerves.

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Autonomic System

The part of the PNS that regulates the body's internal environment, maintaining homeostasis.

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Adrenaline

A hormone that prepares the body for immediate action, sometimes called "fight-or-flight".

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Sending Nerve Impulses

The process by which nerve impulses are transmitted from one neuron to another through a series of chemical events.

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Dendrites

The part of a neuron that receives impulses and transports them to the cell body and then the axon.

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Study Notes

Nervous System Anatomy

  • The nervous system constantly sends and receives messages to manage body functions.
  • The brain receives sensory input from the spinal cord and nerves, and controls body functions.
  • The spinal cord provides sensory information to the brain.
  • Nerves are bundles of nerve cells (neurons) that transmit impulses between the body and brain.
  • The brain organizes and processes information for the body, including memory and coordination.
  • The cerebrum is the largest part of the brain, responsible for problem-solving, memory, and reasoning.
  • It's divided into two hemispheres: the right controls the left side of the body, the left controls the right.
  • Each hemisphere has four lobes:
    • Frontal lobes (motor area): responsible for motor functions and higher-order functions like reasoning and memory.
    • Parietal lobes: responsible for sensory impulses (pain, touch, temperature) and visual perception.
  • The cerebellum coordinates muscle movements and is located below the cerebrum.
  • The brain stem controls involuntary processes like breathing, digestion, and blood circulation. It's divided into the midbrain, pons, and medulla oblongata.
  • The medulla oblongata becomes the spinal cord responsible for heart rate, breathing, and blood pressure functions.

Spinal Cord

  • The spinal cord is the major communication pathway between the brain and the peripheral nervous system.
  • It's a series of 31 pairs of nerves that run down the spine.
  • It carries information to and from the brain regarding the body's internal and external conditions.
  • Ascending nerve tracts carry information from the body's muscles and glands to the brain.
  • Descending nerve tracts deliver messages from the brain to the muscles and glands.

Nerves

  • Nerves are bundles of nerve cells (neurons).
  • Neurons are specialized cells that send and receive messages.
  • Neurons have a cell body (soma) with a nucleus, dendrites that receive signals, and axons that transmit signals.
  • Signals travel across synapses, gaps between neurons.
  • There are three types of neurons: sensory, motor, and interneurons.
    • Sensory neurons carry information from sensory receptors to the CNS.
    • Motor neurons carry signals from the CNS to muscles and glands.
    • Interneurons connect sensory and motor neurons within the CNS.

Brain and Nervous System Functions

  • The cerebellum coordinates muscle movements.
  • The hypothalamus regulates bodily functions like sleep, thirst, hunger, and body temperature.
  • The thalamus is a relay center for sensory information.
  • The midbrain relays signals between the spinal cord and brain/cerebellum.
  • The pons connects the cerebellum to the cerebrum and to other parts of the brain stem.

The 5 Senses

  • The 5 senses are sight, sound, smell, taste, and touch which allow interaction with the environment
  • Specialized receptors in the sensory organs translate sensory stimuli into electrical signals which travel through the nervous system
  • The nervous system and sensory organs work together for processing sensory data for interpreting and responding to the environment

Impulses

  • Nerve impulses transmit information between body parts and the brain.
  • They move through a chain of chemical events, starting from dendrites receiving impulses to axons sending them.
  • Synapses are where nerve impulses move from one neuron to another.

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