eq: how does the nervous and endocrine systems help regulate conditions in the body?
TRANSCRIPT
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EQ: How does the nervous and endocrine systems help regulate
conditions in the body?
Nervous and Endocrine Systems
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The Body’s communication systems help maintain homeostasis.A stimulus causes a response
Responses can be chemical, cellular, or behavioral
The nervous and endocrine systems respond to stimuli
How Organ systems Communicate
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The nervous system controls thought, movement, and emotion
The endocrine system controls growth , development and digestion.
Organ Communications
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StructureBrain, spinal cord,
sensory neurons, interneurons, motor neurons
FunctionRegulates body’s
response to changes in internal and external environment, processes information
Nervous System
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Neurons are highly specialized cellsThree parts
1. Cell body – has nucleus and organelles2. Dendrites – receive impulses3. Axon – carries impulses
Neurons
cell body
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Three types of neurons Sensory neurons –
receive informationInterneurons –
relay information from sensory to motor neurons
Motor neurons – conduct impulses from the brain or spinal cord to muscles or glands
Neurons
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An action potential is a moving electrical impulse but also has a chemical component.The electrical impulse moves along the axon till
it reaches a synapseA neurotransmitter is released in the synapse
where it then stimulates the next cellNeurotransmitter is a chemical signal between
nerve cells.
Nerve Impulse
neurotransmitter
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Structure:Hypothalamus,
pituitary, thyroid, parathyroid, adrenals, pancreas, ovaries, testes.
Function:Influences growth,
development metabolism; helps maintain homeostasis
Endocrine System
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The endocrine system produces hormones:Hormones influence a cell’s activities by
entering the cell or binding to its membraneHormones travel though circulatory systemTwo types –
Steroid hormones enter the cellNonsteroid hormones do not enter the cell
Hormones
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The hypothalamus interacts with the nervous and endocrine systems.The hypothalamus is a gland found in the brainProduces releasing hormones sent to pituitary gland.
The pituitary gland is found below the hypothalamus in the brain.
Controls growth and water levels in blood; produces hormones sent throughout the body.
Feed-back Loops
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Releasing hormones stimulate other glands to produce hormones.Allow glands to
communicate with one another
Are used in temperature regulation
Feed-back Loops
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1. What is homeostasis?2. How does the skin help provide protection?3. How does the skin help maintain homeostasis?4. What are the functions of the:
IntegumentarySkeletalMuscularRespiratoryCirculatoryNervousEndocrine
5. What are the three types of muscle tissue and what are the characteristics of each?
Test Study Guide
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6. What is the difference between ligaments and tendons?
7. How do the Respiratory and Circulatory system work together to help maintain homeostasis?
8. What are alveoli?9. How is breathing regulated?10.What are the 3 types of blood vessels and
what are their characteristics?11.What are the 3 types of neurons?12.How do neurons transfer information?13.What are hormones and what do they
influence?14. How do the hypothalamus and pituitary
gland regulate body temperature?