Homeostasis and Hormones 1/2 MOCKS Flashcards
What is homeostasis MOCKS
The maintenance of a constant internal environment
Body temperature and body water content are examples
What does a coordinated response require
- stimulus (change in environment)
- receptor (part of the body that detects the change)
- effector (target organ/gland/muscle)
How does the skin control temperature
Sweating- evaporates from skin taking heat from the blood (needs energy)
Hair on the surface of skin- the hair erector muscles relax
Vasoconstriction- capillary constrict so blood can’t get close to the skin so heat isn’t lost
Shivering- rapid contraction of muscles
FSH
- FSH is released first
- matures egg
- produced in pituitary gland
OESTROGEN
- released second after FSH
- causes the thickening of uterus lining
- produced in ovaries
- oestrogen inhibits FSH
LH
- LH is produced third after oestrogen
- egg is released - OVULATION
- produced in pituitary gland
- LH inhibits oestrogen
PROGESTERONE
- maintains lining of the uterus
- released in the ovaries
- Progesterone inhibits LH
TESTOSTERONE
produced by the testes – is the main male reproductive hormone and it stimulates sperm production
ADRENALINE MOCKS
Adrenaline is produced in the medulla in the adrenal glands
It targets vital organs, increases the heart rate and boosts the delivery of oxygen and glucose to the brain and muscles
INSULIN MOCKS
- pancreas produces insulin after detecting a blood glucose increase
- insulin acts in the liver to reduce blood glucose concentration
- converts excess glucose to glycogen
- increasing respiration in liver
- increasing glucose absorption from blood by the liver/muscles
What is the placenta
The placenta is an organ responsible for providing oxygen and nutrients, and removing waste substances. It grows into the wall of the uterus and is joined to the fetus by the umbilical cord.
What does amniotic fluid do?
The amniotic sac produces amniotic fluid, which surrounds and protects the developing embryo.
