Chapter 7 Flashcards
What is metabolic rate
The rate at which energy stored in your food is transferred by all the reactions that take place in your body
What allows reactions to take place inside cells
Energy need to make muscles contract
How does the body maintain its body temperature
Energy is transferred from the body to cooler surroundings
What does thyroid release
Thyroxine
What does thyroxine do
It causes cells to contract more rapidly and strongly
What happens when cells contract more rapidly and strongly
The heart rate will increase and heart pressure on blood increases, this moves oxygen and glucose faster so they can gain more energy
What is negative feedback
A control mechanism reacting to a change in a condition by trying to bring levels back to normal
What does the hypothalamus do
Detects thyroxine levels in the blood
What dies the hypothalamus when blood levels are low
It releases trh which makes the pituitary gland to secret tsh
What are the 3 contraception methods
Male condom
Diaphragm or cap
Hormone pill
How does a condom prevent fertilisation
Placed over erect penis to prevent sperm entering through vagina
How does the diaphragm/cap prevent fertilisation
Placed over cervix, prevents sperm in vagina entering the uterus
How does the hormone pill prevent fertilisation
Releases hormones to prevent ovulation and thickens mucus at the cervix making it difficult for sperm to pass through
What does FSH do
Matures the egg
What does LM do
Releases the egg
