3.1 Organization of the Nervous System

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Sensory Input
Gathering information to monitor changes occurring inside and outside the body.
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change in movement or structure of object
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To process and interpret sensory input and decide if action is needed
Motor output
A response to integrated stimuli. It response activates muscles or glands
Two different types of Nervous System
Central Nervous System (CNS) and Peripheral Nervous System (PNS)
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Central Nervous System
Runs through the Central part of the body.
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Give an example of Central Nervous System
Brain and Spinal Cord
What are the 2 types of Peripheral Nervous System?
Sensory (afferent) division and Motor (efferent) division
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Sensory (afferent) division
Conveys impulses to the CNS
Two types of Sensory (afferent) division?
Somatic sensory fibers and Visceral Sensory fibers
What are Somatic sensory fibers?
Deliver impulses from the skin, skeletal muscle, and joints
What are Visceral Sensory fibers?
Deliver impulses from visceral (internal) organs. Example: Heart, lungs.
What is Motor (efferent) division?
Carries impulses from the CNS to effector organs: Muscles and glands
Two types of Motor (efferent) division
Somatic (voluntary) nervous system and Autonomic (involuntary) nervous system.
Two types of Autonomic (involuntary) nervous system
- Sympathetic: flight or flight - Parasympathetic: Rest and digest.
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Flight or flight means which type of autonomic nervous system?
Parasympathetic nervous system is responsible for
Rest and digest
4 regions of Brain
Cerebrum, Diencephalon, Brain Stem and Cerebellum
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The 4 lobes of the cerebrum
- Frontal Lobe - Parietal Lobe - Occipital Lobe - Temporal Lobe
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What is frontal lobe responsible for?
Decision making
What is Parietal lobe responsible for?
What is Occipital lobe responsible for?
What is Temporal lobe responsible for?
Smell and hearing
3 parts of Diencephalon
Thalamus, Hypothalamus and Epithalamus
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What is Thalamus?
Relay station for sensory impulses (taste, sight, hearing, equilibrium) except for olfactory neurons (sense of smell)
Which part of Diencephalon has pituitary gland?
What is the function of Hypothalamus
Controls and maintains homeostasis. Also involved in emotions, learning and motivation
3 types of Brain Stem
Midbrain, Pons and Medulla oblongata
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Midbrain function
Reflex centers for vision and hearing
Pons function
nuclei involved in the control of breathing and sleep
Medulla oblongata is the control center of? (Hint: there are 5)
- Heart rate control - Blood pressure regulation - Breathing - Swallowing - Vomiting
What is the function of Cerebellum?
Provides coordination of body movements to maintain balance coordination and posture