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The Endocrine System Chapter 2, Lecture 3

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The Endocrine System Chapter 2, Lecture 3 If the nervous system s communication delivers messages rather like e-mail, the endocrine system is the body s snail ... – PowerPoint PPT presentation

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Title: The Endocrine System Chapter 2, Lecture 3


1
The Endocrine SystemChapter 2, Lecture 3
If the nervous systems communication delivers
messages rather like e-mail, the endocrine system
is the bodys snail mail. - David Myers
2
The Endocrine System
The Endocrine System is the bodys slow
chemical communication system. Communication is
carried out by hormones synthesized by a set of
glands.
3
Hormones
  • Hormones are chemicals synthesized by the
    endocrine glands that are secreted in the
    bloodstream. Hormones affect the brain and many
    other tissues of the body.

For example, epinephrine (adrenaline) increases
heart rate, blood pressure, blood sugar, and
feelings of excitement during emergency
situations.
4
Pineal Gland
Regulates biological rhythms (menstrual cycle,
sleep/wake cycle) Responsive to sunlight
(melatonin)

5
Thyroid Parathyroid Glands
Regulate metabolic and calcium rate.
Uses thyroxin to regulate metabolism (more
thyroxin ? higher metabolism)
Uses parathormone to regulate ion levels in
neurons
6
Gonads
Sex glands are located in different places in men
and women. They regulate bodily development and
maintain reproductive organs in adults.
7
Islets of Langerhans (Pancreas)
Regulates level of sugar in the blood Glucagon
increases blood sugar, insulin decreases sugar
(factors in huger motive and how energetic
someone feels)
8
Adrenal Glands
Adrenal glands consist of the adrenal medulla and
the cortex. The medulla secretes hormones
(epinephrine and norepinephrine) during stressful
and emotional situations, while the adrenal
cortex regulates salt and carbohydrate metabolism.

9
Pituitary Gland
Is called the master gland. The anterior
pituitary lobe releases hormones that regulate
other glands. The posterior lobe regulates water
and salt balance. Regulates stress reactions and
disease resistance secrets growth hormone (cause
of dwarfism and gigantism).

10
Homework
Study!
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