SCIENCE GCSE
No description yet. This curated deck is ready for daily study.
Card preview (24)
What is homeostasis?
Regulating the conditions of the human body
What conditions require control in the human body?
Body temperature Blood glucose level Water content
What structures are involved in the nervous system?
Brain Spinal Cord Network of nerves
What is the function of the nervous system?
Helps all other parts of the body communicate with each other
What are the structures of a reflex arc? What order do electrical impulses pass through them?
Receptors->sensory neuron->spinal cord->motor neuron->muscle
Why are reflex actions important? Why are they automatic?
Reflex actions protect us from danger They don’t need to send a signal to the brain
How do hormones travel round the body?
They are passed straight into the bloodstream
What is the system for glands?
The endocrine system
What is the role of oestrogen? Where is it produced?
Thickens the uterus lining Produced in ovaries
What is the role of progesterone? Where is it produced?
Prepares the uterus lining for a fertilised egg to implant and grow Produced in ovaries
What is the role of testosterone? Where is it produced?
Helps develop the male human body Produced in testes
What is the role of insulin? Where is it produced?
Reduce blood glucose levels Produced in pancreas
What is the role of glucose? Where is it produced?
Provides energy for cells Produced in liver
What is the role of adrenaline? Where is it produced?
Increases the blood flow to the heart Produced in adrenal glands
What is the role of LH? Where is it produced?
Stimulates testosterone release Produced in pituitary gland
What is the role of TSH? Where is it produced?
Tells your thyroid how much thyroid hormone it needs to make Produced in pituitary gland
What is the role of thyroxine? Where is it produced?
Controls how much energy your body uses Produced in thyroid gland
What is a negative feedback cycle? What hormones operate using a negative feedback loop
The action taken by a body to return it to its normal level Insulin and glucagon
What are the 4 main hormones in the menstrual cycle? What do they do?
LH- Stimulates testosterone release FSH- Helps control the menstrual cycle Oestrogen-Thickens uterus lining Progesterone- Prepares uterus lining for a fertilised egg to be implanted
What is fertilisation?
Fusing the 2 sex cells
Where and why does meiosis happen?
Testes and ovaries Ensures all organisms produced by sexual reproduction have the correct amount of chromosomes
What is DNA?
the chemical that makes up the genetic material of humans
What is a chromosome?
Multiple strands of DNA
What is a gene?
Section of DNA that controls a cells chemistry- especially protein production.