YEAR 11 Animal Coordination, Control, Homeostasis Flashcards
Define hormones
Chemical messengers in the body
Where are hormones released into from endocrine glands
The bloodstream
What hormone does the thyroid gland make
And what does it do
Thyroxine
Controls metabolic rate (all energy use)
What is the purpose of ADH
Anti Diuretic Hormone
Controls blood water level by triggering water uptake in kidneys
What is the purpose of insulin
Moves glucose from bloodstream to other cells
What 2 hormones does the pancreas make
Insulin
Glucagon
What is the purpose of the hormone Glucagon
Decreases uptake of glucose to control blood sugar
What hormone do the ovaries make
And what does it do
Oestrogen
Stimulates LH production
Suppresses FSH production
What 3 hormones does the pituitary gland make
ADH
FSH
LH
What is the purpose of FSH
Triggers egg ripening and oestrogen production
What is the purpose of LH
Triggers egg release and progesterone production
What hormone do the testes make
And what is its purpose
Testosterone
Controls puberty in males
How does adrenaline help us avoid danger
Pupils dilate for better sight
Glycogen in liver broken into glucose for energy
Faster heartbeat means more blood goes to muscles and brain
What does the hypothalamus do and where is it in the body
It is part of the brain
It maintains homeostasis
Controls the endocrine system
How does body hair warm us up
Temperature receptor detects cold
Hair erector muscle CONTRACTS
Hair is standing up TRAPPING HEAT NEAR SKIN
How does body hair cool is down
Temperature receptors detect heat
Hair erector muscle RELAXES
Hair flattens TRAPPING LESS HEAT NER THE SKIN
Where does fertilisation occur
The oviduct/fallopian tubes
What is the name for a fertilised egg
Zygote
Explain the Full menstrual cycle
Old uterus lining exits via cervix
Oestrogen causes a Spongy lining to build up
FSH causes a follicle and ovum to mature in the ovary
A surge in LH bursts the follicle, releasing the ovum into the oviduct
The follicle turns into the corpus luteum, releasing Progestorone to maintain the uterus lining.
What are the 2 purposes of the ovaries
To produce oestrogen
To produce and release a mature egg
What is diabetes
A disease where blood glucose levels rise to a dangerous level
What are symptoms of diabetes
Thirst
Hunger
Pissing
Urine with high glucose
What is the difference between type 1 and 2 diabetes
1- Genetic
2- Lifestyle
Why do diabetics feel tired and lose weight
Glucose is removed through urine
The fat is broken down for energy
