Lab 27. The Endocrine System
For Your Safety
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Read the two sheets (green and pink)
Sign the yellow sheet
Under 18? Please see me.
Sign out the microscope you will use this
quarter.
Lab safety
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First aid kit at the front
Fire extinguisher at the back
Eye wash at sink
Showers in the back
Anyone else “First Aid” certified?
Lab Safety
• No eating or drinking in lab
• Clean up rule:
– It is your responsibility to clean up after
yourself and put everything back clean and
where it belongs.
Lab clean up
• Put models back, as you found them
• Put microscopes back
• Put slides back in the proper box and
correctly inserted.
• (Another class comes in right after you
– those students should not have to
search for misplaced items!)
Lab clean up
• Dispose of other items as follows:
– Paper towels go in the trash
– Broken glass and slide cover slips go in
“broken glass” container
– Biological waste goes in red bucket:
– Empty slides get rinsed, dried, and
returned to box
– Dissection tools: clean or put in wash
– Wipe down your bench area when done
MICROSCOPE SIGN UP
• Sign in on the sheet next to you
microscope number –
• Use this same microscope for the quarter
BIOLOGY TUTORING
Monday
2-6 pm
AS 1615
Mike
A&P
Tuesday
2-6 pm
AS 1615
Moira
Gen. Bio.
Majs. Bio.
Wednesday
2-6 pm
AS 1615
David
A&P, Micro
Gen. Bio.
Majs. Bio.
Thursday
2-6 pm
AS 1615
David
A&P, Micro
Gen. Bio.
Majs. Bio.
Friday
12-4 pm
AS 1615
Ray
A&P, Micro
Saturday
10-2pm
AS 1614
Moira
Gen. Bio.
Majs. Bio.
Endocrine
Organs
Pituitary Gland
Pituitary
• A
• B
• C
Pituitary Control
Thyroid
Gland
Follicles:
follicular cells
surrounding
lumen filled with
thyroglobulin
T3, T4
C Cells
(parafollicular
cells): Calcitonin
Thyroid
Parathyroid Gland
Chief
cells:
Oxyphil
cells
Adrenal Glands
Adrenal Glands
• Cortex
– Zona glomerulosa: mineralcorticoids
– Zona fasciculata: glucocorticoids
– Zona reticularis: sex steroids
• Medulla: epinepherine and norepinepherine
Pancreas
Pancreas
• Endocrine pancreas:
– Islets of Langerhans
• Alpha cells: glucagon
• Beta cells: insulin
• Exocrine pancreas:
– Acinar cells: digestive
juices, buffers
Male
Gonad:
Testis
Interstitial Cells:
Secrete
testosterone
Female
Gonad:
Ovary
Follicular cells:
secrete estrogens
As corpus luteum,
secrete estrogen
and progesterone
Today’s Lab
• Examine slides:
– Thyroid gland
– Parathyroid gland
– Pancreas
– Pituitary
– Adrenal gland
– Draw and label each tissue on paper provided
• Complete review sheet
• Due next week in lab (Monday)