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Posterior
Pituitary
Thyroid
Regulatory
Feedback
Gonads
Potpourri
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This hormone causes the direct
reabsorbtion of water in the
kidneys.
Antidiuretic Hormone
This hormone exhibits one of the
only examples of positive
feedback in the human body
Oxytocin
Where are the hormones of the
posterior pituitary synthesized?
The hormones of the posterior
pituitary are synthesized in the
hypothalamus
Describe how the the posterior
pituitary is stimulated to release
it’s hormones.
The hypothalamus and posterior
pituitary are connected by special
neurons and these neurons signal
the relase of posterior pituitary
hormones such as ADH and
ocytocin
Identify one stimulus for the
secretion of ADH.
Dehydration or low blood
pressure
DOUBLE JEOPARDY!!!
Where is the thyroid gland
located?
In front of the larynx
What is the function of
thyroxine?
Increases body metabolism
What happens to TSH levels
when Thyroxine levels rise in the
bloodstream?
TSH levels will decrease as a
result of negative feedback.
What characteristics would you
expect to see in somebody who
has hypothyroidism
Hypothyroidism would results in
an under-production of thyroxine
and thus low metabolism =
overweight, lethargic, cold etc.
What would be the relative
concentration of Calcitonin in the
blood if levels of parathyroid
hormone are high?
Calcitonin would be low as they
are antagonistic hormones
Give one example of negative
feedback
Answers will vary
High levels of thyroxine will
cause a decrease in the secretion
of what hormone?
Increased thyroxine would cause
a decrease in the amount of
thyroid stimulating hormone
(TSH) as a result of negative
feedback.
Gland #1
Hormone A
Is released
Uterine Contractions
become more frequent
Given the diagram above, what is
going to happen to the level of
hormone A in the bloodstream?
Hormone A is oxytocin and thus
will increase as a result of
positive feedback.
Gland #1
Hormone A
Is released
Gland #2
[Hormone B]
increases
(-)
Based on this diagram, what is
going to happen to levels of
hormone A?
Hormone A will decrease as
hormone B increases as a result
of negative feedback
High levels of Gonadotropic
Releasing Hormone (GnRH)
would be caused by low levels of
which hormones?
Low levels of testosterone,
estrogen, and progesterone would
increase levels of GnRH which
would in turn increase FSH and
LH production and subsequently
sex hormone production
Testosterone contributes to male
secondary sex characteristics.
Name two of those
characteristics.
Any two of:
Deep voice, muscle build, facial har,
fat deposition etc.
What is the primary role of
progesterone in women?
Progesterone’s primary function
is to develop and maintain the
uterine lining and prevent
contractions
From which endocrine gland is
testosterone secreted?
Testes
Which pituitary gland hormone
stimulates the production of
testosterone, estrogen, and
progesterone?
Luteinizing Hormone stimulates
the production of testosterone in
males, and indirectly the
production of progesterone and
estrogen in females.
Which two hormones stimulate
the development of sperm?
FSH & Testosterone
From which part of the pituitary
are TSH and ACTH secreted?
Anterior Pituitary
What is the difference between
an exocrine gland an an edocrine
gland?
Exocrine = contains ducts and
secretes outside the bloodstream
Endocinre = into the bloodstream
What is the difference between
Prolactin and Oxytocin?
Prolactin stimulates milk
production in the mammary
glands whereas oxytocin
stimulates milk release in the
mammary glands as well as
uterine contractions
What is the major difference
between the Endocrine system
and the Nervous System with
respect to maintaining
homeostasis?
Endocrine system acts over
longer durations while the
nervous system acts over short
durations
Name both opposing teams for
the basketball games tonight
LSL & Sturgeon