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33 Cards in this Set
- Front
- Back
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It is made up of the brain, spinal cord, nerves, and sensory receptors. |
Nervous System |
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Functions of the Nervous system |
1. Maintaining homeostasis 2. Receiving sensory input 3. Integrating information 4. Controlling muscles and glands 5. Establishing and maintaining mental activity |
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The two division of Nervous system |
1. Central Nervous System (CNS) 2. Peripheral Nervous System (PNS) |
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Major site for processing information, initiating responses, and integrating mental process. |
1. Central Nervous System (CNS) |
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Consists of all nervous tissue outside CNS. Located in the skin, muscles, joints, internal organs, and special sensory organs such as eyes and ears. |
2. Peripheral Nervous System (PNS) |
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connects the spinal cord and brain |
Foramen Magnum |
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Endings of neuron. Specialized cells that detect temperature, pain, touch, pressure, light, sound, odor, other stimuli. |
Sensory receptors |
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Bundle of nerve fibers called axons and their sheaths, connects the CNS to sensory receptors, muscles, and glands. |
Nerves |
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Collection or clusters of neuron cell bodies located outside the CNS. Carries nerve signals to and from the CNS. |
Ganglia |
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extensive networks of axons and in some cases, neuron cell bodies located outside the CNS. |
Plexuses |
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Subdivisions of PNS |
1. Sensory Division 2. Motor Division |
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Afferent (towards) |
Sensory Division |
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Efferent (away) |
Motor Division |
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• Transmits electrical signal called action potentials, from the sensory receptors to the CNS. • Neurons that carry sensory impulses from sensory organs. • Usually found in the eyes, skin, ears, tongue and nose, |
Sensory Division |
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• A neuron that carries motor impulses from the CNS specific effectors is known as motor neurons. • Found in muscles and glands. |
Motor Division |
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SUBDIVISION OF MOTOR DIVISION |
1. Somatic Nervous System (voluntary) 2. Autonomic Nervous System (involuntary) |
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Allows us to consciously control movements of our skeletal muscles. Reflec Arcs |
Somatic Nervous System (voluntary) |
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Controls our unconscious activities such as smooth muscle, cardiac muscle and secretion by certain glands. |
Autonomic Nervous System |
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SUBDIVISION OF AUTONOMIC DIVISION |
Sympathetic and Parasympathetic Division |
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This system is responsible for your body’s “flight-or-fight” response or prepares the body for stressful situations. |
Sympathetic Division |
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Controls body process during ordinary situations. Restoring and digesting |
Parasympathetic Division |
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CELLS OF THE NERVOUS SYSTEM |
1. Neuron 2. Supportive Cells |
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- Receive stimuli - Conduct action potentials - Transmits signals to other neurons of effectors organs. |
Neuron |
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Called neuroglia nerve or glial cells |
Supportive Cells |
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NEURONS FUNCTIONS |
1. Receive signals or information. 2. Integrate incoming signals (to determine whether or not the information should be passed along). 3. Communicate signals to target cells (other neurons or muscles or gland). |
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to maintain the cell and to keep the neuron functioning efficiently. Where the neuron’s DNA is housed. |
Neuron Body Cell or Soma |
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Tree-root shaped part of the neuron. Their purpose is to receive information from other neurons and to transmit electrical signals towards the cell body. |
Dendrites |
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axon hillock |
Axon |
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to carry signals away from the cell body to the terminal buttons, in order to transmit electrical signals to other neurons |
Axon |
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TYPES OF NEURONS |
1. Multipolar neuron 2. Bipolar neuron 3. Pseudo-unipolar neuron |
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has many dendrites and an axon |
Multipolar neuron |
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has a dendrite and an axon. |
Bipolar neuron |
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appears to have an axon and no dendrites. |
Pseudo-unipolar neuron |
