Week5 Endocrine System
Week5 Endocrine System
Week5 Endocrine System
What is the
endocrine
system?
Thyroid-Stimulating
Hormone (TSH):
essential for the growth
and development of the
thyroid gland.
Secretions from the anterior
pituitary gland…
Follicle-Stimulating
Hormone (FSH): is a
gonadotropic hormone.
It stimulates the
growth ovarian
follicles in the female
and the production of
sperm in the male.
Secretions from the anterior
pituitary gland… Luteinizing
Hormone (LH): is a
gonadotropic
hormone
stimulating the
development of
corpus luteum in
the female ovarian
follicles and the
The yellow corpus luteum production of
remains after ovulation; it testosterone in the
produces estrogen and male.
progesterone.
Secretions from the anterior
pituitary gland… Prolactin (PRL):
stimulates the
development and
growth of the
mammary glands
and milk production
during pregnancy.
Calcitonin: influences
bone and calcium
metabolism;
maintains a
homeostasis of
calcium in the blood
plasma
Secretions of the thyroid gland…
Thyroxine (T4) and
triodothyronine (T3):
essential to BMR – basal
metabolic rate (the rate at
which a person’s body
burns calories while at rest);
influences physical/mental
development and growth
Hyposecretion of T3 and T4 = cretinism,
myxedema, Hashimoto’s disease
Androgens: several
hormones including
testosterone; they
promote the
development of
secondary sex
characteristics in
the male.
Secretions from the
adrenal medulla…
Dopamine is used
to treat shock. It
dilates the
arteries, elevates
systolic blood
pressure,
increases cardiac
output, and
increases urinary
output.
Secretions
from the
adrenal
medulla…
It produces
chorionic
gonadotropin
hormone,
estrogen, and
progesterone.
Secretions of the
gastrointestinal mucosa…
The mucosa
of the pyloric
area of the
stomach
secretes the
hormone
gastrin, which
stimulates the
production of
gastric acid
for digestion.
Secretions of the
gastrointestinal mucosa…
The mucosa of
the duodenum
and jejunum
secretes the
hormone
secretin, which
stimulates
pancreatic juice,
bile, and
intestinal
secretion.
Secretions of the
thymus…
The thymus gland has
two lobes, and is part
of the lymphatic
system. It is a
ductless gland, and
secretes thymosin.
This is necessary for
the Thymus’ normal
production of T cells
for the immune
system.
THE END
ENDOCRINE SYSTEM