biology 1

• the uses for mitosis is growth and devlopment and epair of damaged cells
• stem cell is undeffiemtated cells
• differntation is a process where an undifferntated cells becomes differnticeted and adapt to a specidfic function
• mitosis produces two genetically identical diploid cells
• the diffence in growth between animas and plant is that animals tsop at a young age where plant continous cell elongate
• precintile charts help us to identify if the baby is groqing niramllly and if there is any disease s
• interphase is when the DNA gets replicated and component are produced
• prophase is when the mebrane condenses
• metaphase chromeoses line up in the middle
• anaphase the chromosomes are pulled by the spindle fibres to each ends of the cell
• cytokensis is where the cyctoplasm splits
• mitosis is aesexual reproduction
• cancer is an uncontrollable cell divison that causes tmours
• plant cells have meristem found in the shoot and te root
• adult stem ceel diffenrtates to ceratin types of cells
• embryonic stem cell differntates to any cell type
• stem cells are used fro transpalant , treat disease and repaor damaged cells
• the risks of stem cell is disease transmission , rejection from the body and , uncontollable division
• cereberum is responsible for language and memory
• cerebelellum is repsonisble for musicle coordination
• medulla for the consious activities
• CT scan shows us the brain tumours
• PET scan brain activity where the oerson is injected with radioactive glucose
• CNS can be tricky to treat as the brain is protcted by the skull and its hard to access
• the sensory neurone is when it send impulses from the receptor to the relay neurone
• motor neurone send impulses to the effcectr to produce a repsonse
• the axon is covered with myelin sheath to speed up the electrical impulse
• the chemcal messganeger for the neurone is neurotransimitter that diffuses and bind into the receptors
• the synapse is the gap between two cells
• the effector is muscle or gland
• the effector is where the response occurs, muscle or gland
• the reflex arc is an automatic reaction without conscious thought
• the spinal cord is part of the CNS which connects the brain to the rest of the body
• the retina contains receptor cells called cones and rods
• cone cells are responsible for colour vision
• rods are responsible for black and white vision
• optic nerve carries impulses from the eye to the brain
• light enters through the pupil into the lens then onto the retina
• light enters through the cornea and passes through the lens to focus on the retina
• the iris controls how much light enters the pupil