29.6 the endocrine system and hormones set up cornell notes on pg. 53 topic: 29.6 the endocrine...

29.6 The Endocrine System and Hormones Set up Cornell Notes on pg. 53•Topic: 29.6 The Endocrine System and Hormones

•Essential Question(s):

1. Create a double bubble that compares the endocrine system and the nervous system.

2.1 Atoms, Ions, and Molecules

29.6 The Endocrine System and Hormones

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


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


• The endocrine system is a collection of physically disconnected organs

• Control growth, development, and responds to your environment


• Ex: body temperature. When you exercise you start to

feel warm. Your endocrine system tells your body to sweat more so you cool down.

Try and come up with 2 more examples at your table

• Salt level• Blood sugar• Sexual development• Growth• Metabolism• Anything controlled by

hormones


• Works more slowly than the nervous system.

– only chemical signals (hormones)– signals move through bloodstream

receptor

target cell

not a target cell

bloodstream

hormone


• Works like a satellite system

• Sends signals in all directions, but you need special receivers to get the signals

• Only cells with certain receptors can receive the signals


• Glands are organs of the endocrine system.

– Glands secrete hormones


• Hormones are chemical signals or messengers that influence cell’s activities.– produced by glands– travel through the circulatory system (blood stream)– affects cells with matching receptors

target cell

hormone

receptornot a target cell

bloodstream


• There are many glands located throughout the body.

– Hormones travel through the bloodstream to cells with matching receptors.

Hypothalamus: makes hormones that stimulate other glands to release hormones

Pituitary: controls growth and water in blood

Thyroid: metabolism, energy levels, digestion

Thymus: helps white blood cells fight off infection

Adrenal Glands: breathe faster, increase blood pressure- heart increases strength

Pancreas: Controls blood sugar by adding or removing sugar from the blood

Ovaries and Testes: Cause sexual maturation, influence sexual characteristics


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.


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.


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!


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


Nervous system

Endocrine system

Quick

Electrical Signals

Slower

Chemical Signals

Connected network

disconnected

Controls thoughts and

movementControls growth and development

Includes CNS and

PNS Respond to stimuli

Maintain homeostasis

Send signals

29.6 the endocrine system and hormones set up cornell notes on pg. 53 topic: 29.6 the endocrine...

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