Human Body Systems By Marie Gengler. Table of Contents  Nervous System  Muscular System  Skeletal System.

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Presentation transcript:

Human Body Systems By Marie Gengler

Table of Contents  Nervous System  Muscular System  Skeletal System

Nervous System

 The function of the nervous system is to nourish neurons and send and receive messages.  The central nervous system is the part that interprets, creating sensations.  Brain  Spinal Cord  The peripheral nervous system is the part that brings in messages.  Nerves

Nervous System  A reflex arc has a receptor that sends responses to sensory neuron.  Then it is sent through the Interneuron and is taken by a motor neuron to muscles needed in movement/reaction.

Nervous System  The cerebral hemispheres make up the cerebrum.  The brain Stem makes up the pons, medulla oblongata, and midbrain.  The cerebellum coordinates skeletal muscle movements.  The diencephalon contains the thalamus and hypothalamus.

Nervous System  Neuron impulses pass neuron to neuron at synapses.  A membrane is depolarized when it becomes less negative.  The membrane potential of a neuron is the difference across the cell.  When the membrane does not have any impulses it is in resting potential.  When threshold is reached active potential occurs.  The active potential is when there are nerve impulses.  The refractory period is when Na+ changes permeability to reestablish resting potential.

Nervous System  Neurotransmitters are chemicals that neurons produce to communicate with the cell that they control.  It influences neurons by being a space that neurons messages can pass through.

Nervous System  Parkinson's Disease  Parkinson’s disease is the loss of brain cells.  Symptoms of it are memory loss and the loss of function.  It occurs between the ages of fifty and over.  Treatment options include medicines that can delay symptoms.

Nervous System  Multiple Sclerosis  Multiple Sclerosis is an autoimmune disease that effects the brain and spinal cord.  Symptoms include fever, numbness, loss of balance, and loss of muscle functioning.  It is more common in woman between the ages of twenty and forty.  It is treated with medications, but it can not be cured.

Muscular System

 The function of the muscular system is to move the body, produce heat, and aid in digestion.  Three types of muscle tissue are smooth, skeletal, and cardiac.

Muscular System  Motor neurons release acetylcholine which then binds to receptors.  Through action potential calcium ions from the sarcoplasmic reticulum to bind troponin causing it to change shape, exposing the active site.  Myosin catalyzes ATP into ADP + P causing myosin head to bind forming a cross bridge.  The myosin head then releases ADP+P causing cross bridges to flex. The muscle then contracts.

Muscular System  Muscular Dystrophy  Muscular Dystrophy is the loss of muscle tissue making it susceptible to damage.  Symptoms are muscle weakness and mental retardation.  Most severe forms happen in early childhood.  Treatments include physical therapy and Corticosteroids, there is no cure.

Muscular System  Myasthenia Gravis  Myasthenia gravis is a neuromuscular disorder.  Symptoms include any weakness in the skeletal muscles.  It occurs more often in young women and older men.  Treatments for it include lifestyle changes and medications.

Skeletal System

 The function of the skeletal system is to support and protect organs.  Bones are the framework.  Ligaments restrict to stop dislocation.  Muscles move the bones during movements of the body.  Tendons connect muscle to bone, moving the bones.

Skeletal System  Animal skeletal systems protect the animals tissues and aid in movement.  There are three different kinds.  Hydrostatic skeletons have fluid filled chambers, jellyfish.  The exoskeleton is a hard outside, spiders.  The endoskeleton is an internal skeleton, humans.

Skeletal System  Osteoporosis  Osteoporosis is the loss of bone tissue over time.  Symptoms include back pain, stooped posture, and bone pain.  Over the age of fifty, one in every five women has it.  Treatments include life style changes, drinking milk at a young age and medications.

Skeletal System  Leukemia  Leukemia is the cancer of the blood cells.  Risk factors are radiation, down syndrome, chemicals, and smoke.  Symptoms include fever, swelled lymph nodes, bruising, and infections.  Treatments include therapy, stem cell transplant, radiation, and chemotherapy.

Works Cited  Human Anatomy Textbook  ase.htm       