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Chemical Regulation Endocrine System Communication
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Structure and Function Lesson 1
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Do Now Brain Pop video: Endocrine System Endocrine SystemEndocrine System
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Endocrine System Regulation of the human body through chemical messengers called hormones to maintain homeostasis Homeostasis = stable internal environment
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Endocrine Regulation Stimulus is detected Impulse sent to brain (hypothalamus) Hypothalamus to pituitary Pituitary sends message to gland Gland releases a hormone Hormone does work New stimulus is detected
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In class assignment Draw a diagram on poster board of the human endocrine system Include: pituitary gland, thymus, thyroid, parathyroid, kidneys, adrenal glands, pancreas, testes, ovaries Describe: the hormone releases from each gland and its function
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Homework Vocabulary/Multiple choice worksheet
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Lesson 2 Hormones
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Do Now Brain Pop video: Hormones Hormones
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Hormones Chemicals released into the blood stream from a gland Needed in very small amounts Contain receptor molecules Act on specific parts of the body –Ex: Insulin will “lock in” to blood cell receptors to lower blood sugar. Insulin cannot “lock in” to other body cells because the receptor sites don’t match.
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ENDOCRINE GLANDS Pituitary = master gland (controlled by the hypothalamus in the brain)
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Pituitary Gland TSH – thyroid stimulating hormone ACTH – stimulates adrenal glands FSH – stimulates the ovaries Oxytocin – labor contractions Calcitonin – Calcium metabolism Releases hormone messengers (do not “do work”)
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ENDOCRINE GLANDS Thyroid Gland – in neck Releases Thyroxine which regulates metabolism Parathyroids – 4 tiny glands behind thyroid Releases Parahormone regulates Calcium in blood
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Adrenal Gland – on top of kidneys Releases Adrenaline which allows the body to respond appropriately in times of emergency or stress “Fight or Flight”
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Pancreas – glands located within the pancreas –Releases Insulin which regulates blood sugar levels Diabetes – caused by decreased amounts of insulin which leads to increase blood sugar coma death if not medicated
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GONADS – sex glands Ovaries Releases Estrogen – 2 nd degree sex characteristics/ cycle Releases Progesterone – cycle and maintain pregnancy Testes Releases Testosterone – 2 nd degree male characteristics and production of sperm production of sperm
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In class assignment Vocabulary and multiple choice worksheet
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Homework Endocrine Worksheet “case studies”
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Lesson 3 Feedback Mechanisms
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Do Now Endocrine Match Up worksheet
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Feedback Mechanisms A cycle in which the output “feeds back” to modify or reinforce the action of the system 2 types: (a)Positive feedback Change in the environment – increases the response Change in the environment – increases the response Ex: uterine contractions during labor (a)Negative feedback most common Change in the environment creates a response message makes a change stops the response message
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Ex: regulate blood sugar Sensor detects Sensor detects high blood sugar high blood sugar Pancreas Negative secretes feedback insulin shuts off insulin production Blood sugar Blood sugar drops drops - Ex: increase exercise increased muscle activity increases HR and BP and resp. rate O2 to muscles
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In class assignment Using your human body diagrams from lesson 1, describe a specific feedback process Color in the affected organs List all hormones involved in the process and how they work
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Homework Human Endocrine Worksheet
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Lesson 4 Disruption of Homeostasis
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Do Now Video:Cancer Cancer
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Disease Disease = failure of homeostasis – the body fails to work as it should Causes of disease: 1)Pathogens – organisms (germs) that invade the body ex: virus, bacteria, fungi. And parasites (spread) – Lyme, cold 2)Uncontrolled cell division
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Cancer mass of abnormal cells called tumor 3) Inherited ex: CF, Down’s 4) Poor nutrition 5) Toxins 6) Organ malfunction 7) High risk – skin/lung cancer
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In class assignment Brain Pop video: Puberty Puberty Multiple choice worksheet/vocab
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Homework Case Studies Research an assigned disease, disorder or cancer which occurs as a result of a disruption of homeostasis and answer questions
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Labs
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