Nervous System By the end of the lesson you should be able to Describe the transmission of impulses from senses to central nervous system and back to muscles.

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Nervous System By the end of the lesson you should be able to
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Nervous System By the end of the lesson you should be able to Describe the transmission of impulses from senses to central nervous system and back to muscles. Describe the reflex action and the pathway of the reflex arc. Describe the function of reflex response. Describe the role of the central nervous system.

Basic nerve cell structure

3 main types of nerve cells sensory neurone relay neurone motor neurone

Sensory neurons Carries impulses from receptors e.g pain receptors in skin to the CNS( brain or spinal cord)

Relay neuron Carries impulses from sensory nerves to motor nerves.

Motor neuron Carries impulses from CNS to effector e.g. muscle to bring about movement or gland to bring about secretion of hormone e.g ADH

Transmission of signals

The Synapse parkinsons

Summary Function: To transmit messages from/ to brain & spinal cord Structures: Motor, relay & sensory neurons Brain Spinal cord

When good organs go bad… brain & nervous system disorders Diseases of the nervous system include: Kuru Parkinson's Obsessive Compulsive Disorder Depression Alzheimer's Huntington’s disease Multiple Sclerosis

When good organs go bad… brain & nervous system disorders This is your normal, healthy brain. This is your brain after a stroke! What is different??

Career Connection What careers relate to the nervous system? Sports Medicine $29,000 Social Services $50,000 Pharmacist $93,000 Nuclear Imaging Tech (MRI/CT) $53,000

Stomach Liver Gall bladder Duodenum Large Intestine Pancreas Small Intestine Appendix Rectum Tongue Trachea Heart Bladder Kidneys Esophagus Lungs Nasal Cavity Brain Diaphragm Salivary Glands Spinal Cord

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