Rest Of Hormones Flashcards
What sysnthesizes insulin in the body?
Beta cells of the pancreas
What is the function of insulin?
Insulin lowers blood sugar by bringing glucose into the cells, stimulating glycogenesis, and equalky inhibits protein and fat breakdown
How does insulin bring glsucose into the cell?
By means of changing the membrane characteristics when bound ti a cellular receptor
What is tye only homrone in the human body that reduces bloos sugar?
Insulin
How is insulin regulated?
By serum blood glucose.
Insulin is released in
Hyperglycemic states or in the presence if glucagon or gastrin
Insukin is inhibted in
Hypoglycemic states or some therapeutic drugs
What tyoe of hormone is leptin?
Glycoprotein hormone
What tyoe of hormone is insulin?
Protein hormone
What hormone balances appetite and energy?
Leptin
Leptin is synthesized in the body by
White adipocytes (fat cells)
Lewhat are white adipocytes?
These are cells of fat tissue (white adipose tissue)
This tissue’s cells produce leptin
White Adipose tissue
Leptin is released when stimulated by certain factors produced in the
Brain
List the functions of leptin
Targets the hypothalamus Sateity hormone Inhibits appetite Stimulates metabolism Induces production of TNF and cell-death protein
Melatonin is produced by what tissue in the body?
Pineal gland of the brain
Leptin and ,elatonin are hormones that target the
Hypothalamus
What are the functions of melatonin?
Induces sleep, decreases attentive state, used as sleeping aid
Imhibits secretion of gonadotropins from pituitary
Decease cortisol levels
Why are cortisol levels decreased at night?
Because at night, melatoninnlevels rise tomake us sleep
Release of melatonin is induced by
Darkness
Release if melatonin is inhibuted by
Light
What direct connection in two areas regukate melatonin?
Direct connection between the retina and pineal gland
Human chorionic gonadotropin is released by
The chorion and placenta
The outer memebrane surrounding a developing embryo is called the
Chorion
What are the functions of hCG?
Stimulates and maintains progesterone production by the corpus luteum until placenta forms, stimulates development of fetal gonads.
Thisnhormone stimulates and sustains progesterone production by the corpus luteum until placenta forms
hCG
What are the clinical uses of hCG?
- Determine pregnancy
- Predict abortion/miscarriage
- Can detect multiple embryos
- DetecthCG producing tumors
When is hCG synthesized by the chorion?
1-2 days after fertilized egg implants into the endometrium
The human placental lactogen is synthesized by the
Placenta
What are the functions of HPL?
- Works with hCG to stimulate progesterone production by CL
- Anti-isulin, by raising blood sugar to ensure fetal nutruition/metabolism needs are met
- Stimulates development of mammary glands and lactation in third trimester
Why are pregnant women susceptible to diabetes?
Because the human placental hormone increases blood sugar so that fetal nutrition and metabolism needs are met
What are the clinical uses of HPL?
Monitor placental function during pregnancy with maternal hypertension
Monitor intrauterine fetal growth