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Sponge #3

Sponge #3. Draw and label a neuron (29.2) Name the 3 parts of the brain, and tell me what each part does. (29.4). Neuron :. neurotransmitter. Cell body. axon. Dendrites. KEY CONCEPT The endocrine system produces hormones that affect growth, development, and homeostasis. 29.4.

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Sponge #3

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  1. Sponge #3 • Draw and label a neuron (29.2) • Name the 3 parts of the brain, and tell me what each part does. (29.4)

  2. Neuron: neurotransmitter Cell body axon Dendrites

  3. KEY CONCEPT The endocrine system produces hormones that affect growth, development, and homeostasis.

  4. 29.4 • cerebrum controls thought, movement, emotion 2. cerebellum allows for balance • 3. brain stem controls basic life functions (breathing, heart beat)

  5. The brain and the spinal cord also control involuntary movements called reflexes. • Reflex arcs are nerve pathways that need to cross only two synapses before producing a response (quick!) • It never travels up the spinal cord to the brain so it is quick!

  6. Glands are organs of the endocrine system.

  7. target cell hormone bloodstream not a target cell receptor • Hormones are chemical signals that influence cell’s activities. • produced by glands • travel through the circulatory system (blood stream) • affects cells with matching receptors

  8. Why do hormones only act on some cells? • Hormones only act on cells that have a matching receptor.

  9. Sponge #8 • Explain how glands and hormones are related. • Explain what reflexes are. Do they involve your brain? Give an example of a reflex.

  10. HYPOTHALAMUS PITUITARY THYROID THYMUS ADRENAL GLANDS PANCREAS FEMALE GONADS :OVARIES MALE GONADS : TESTES Endocrine glands secrete hormones that act throughout the body. • There are many glands located throughout the body. Hypothalamus: makes hormones that stimulate other glands to release hormones Pituitary: controls growth and water in blood Thyroid: growth and development Thymus: helps white blood cells fight off infection Adrenal Glands: breathe faster, increase blood pressure- makes you feel alert Pancreas:makes enzymes that digest your food Ovaries and Testes: make hormones that affect sexual development • Hormones travel through the bloodstream to cells with matching receptors.

  11. Releasing hormones stimulate other glands to produce hormones. • allow glands to communicate with one another • are used in temperature regulation

  12. 2)How does releasing hormones help glands to communicate with one another? • The glands are not connected. Releasing hormones stimulate other glands to produce and release their hormones.

  13. Hormonal imbalances can cause severe illness. • Abnormal hormone levels affect homeostasis. • Hormonal imbalances might be treated with surgery or medicine. • Steroids, a pituitary tumor, or some prescription drugs can make the pituitary overactive and indirectly cause problems.

  14. Robert Wadlow- (1918-1940) • 8 ft 11.1 in and 485 lbs • Pituitary gland disorder- gave him too much of the growth hormone • Used leg braces to walk, had little feeling in his legs and feet • Died at the age of 22 from an infected ankle blister Tallest man EVER recorded!

  15. Jon Brower Minnoch (1941-1983) • Heaviest man ever recorded • Peak weight 1,400 lbs • Suffered from generalized edema – his body retained massive amounts of fluid. Over 900 lbs was due to the fluid. • Was hospitalized. Put on a strict diet and dropped to 475 lbs • Returned a yr later weighing 952 lbs • They discontinued treatment because his edema was incurable

  16. Endocrine System Organ Poster 1)Write name of organ 2) Draw an outline of a person 3) Draw the organ 4) Explain what it does (898) 5) What hormones does it make? (899) *Be prepared to present to the class • Hypothalamus • Pituitary • Thyroid • Thymus • Adrenal Glands • Pancreas • Gonads: Ovaries • Gonads: Testes Pg. 898-899

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