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29.6 The Endocrine System and Hormones
Sponge #3
1) Draw and label a neuron (29.2)
2) Name the 3 parts of the brain, and tell
me what each part does. (29.4)
29.6 The Endocrine System and Hormones
Neuron:
neurotransmitter
Cell body
axon
Dendrites
29.6 The Endocrine System and Hormones
KEY CONCEPT
The endocrine system produces hormones that affect
growth, development, and homeostasis.
29.6 The Endocrine System and Hormones
29.4
1. cerebrum controls
thought, movement,
emotion
2. cerebellum allows for
balance
3. brain stem
controls basic life
functions
(breathing, heart
beat)
29.6 The Endocrine System and Hormones
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!
29.6 The Endocrine System and Hormones
• Glands are organs of the
endocrine system.
29.6 The Endocrine System and Hormones
• Hormones are chemical signals that influence cell’s
activities.
– produced by glands
– travel through the circulatory system (blood stream)
– affects cells with matching receptors
target cell
hormone
bloodstream
receptor
not a target cell
29.6 The Endocrine System and Hormones
1) Why do hormones only act on some cells?
• Hormones only act on cells that have a matching
receptor.
29.6 The Endocrine System and Hormones
Sponge #8
1)Explain how glands and
hormones are related.
2) Explain what reflexes are. Do
they involve your brain? Give an
example of a reflex.
29.6 The Endocrine System and Hormones
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
HYPOTHALAMUS
PITUITARY
THYROID
THYMUS
ADRENAL GLANDS
PANCREAS
FEMALE GONADS
:OVARIES
MALE GONADS : TESTES
Ovaries and Testes: make hormones that
affect sexual development
– Hormones travel through the bloodstream to cells with
matching receptors.
29.6 The Endocrine System and Hormones
• Releasing hormones stimulate other glands to produce
hormones.
– allow glands to
communicate with one
another
– are used in temperature
regulation
29.6 The Endocrine System and Hormones
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.
29.6 The Endocrine System and 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.
29.6 The Endocrine System and Hormones
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!
29.6 The Endocrine System and Hormones
Jon Brower Minnoch (19411983)
•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
29.6 The Endocrine System and Hormones
Endocrine
System Organ
Poster
•
•
•
•
•
•
•
•
Hypothalamus
Pituitary
Thyroid
Thymus
Adrenal Glands
Pancreas
Gonads: Ovaries
Gonads: Testes
Pg. 898-899
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