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2603065
Biology Y9
Descripción
Biology revision
Sin etiquetas
science
biology
year 9
Mapa Mental por
joybakare232
, actualizado hace más de 1 año
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Creado por
joybakare232
hace alrededor de 9 años
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Resumen del Recurso
Biology Y9
Nature
Kingdoms
Plants
Hvae cells with a definite nucleus, made up of different cells,though not a heterotroph
Herbaceous legume
Animals
Have cells with a definite nucleus, made up of different cells, a heterotroph but doesnt have cell wall, feed by external digestion
Invertabrates
Jelly fish
Vertabrates
Dog
Fungi
Found in any habitat, can be single celled or multicellular
Yeast
Bacteria
Does not have cells or a definite nucleus
Entertis
Protoctista
Made up of different cells with a definite nucleus
Chlorrella
Viruses
Ebola
Movement of substances
Diffusion
The net movement of particles of a solute or gas from an area of high concentration to an area of low concentration as a result of random movement
Osmosis
The diffusion of water molecules from a high concentration of water to a low concentration of water across a partially-permeable membrane
Osmosis in cells
Cell in a dilute solution becomes TURGID
TURGID- Full up with water
Cell in concentrated solution become FLACCID
Cell not completely full up with water
PLASMOLYSED CELL- cytoplasm is pulled away from the wall
PLASMOLYSED- Dying from lack of water.
Active transport
The movement of particles against a concentration gradient and/or across a cell membrane
This process uses energy provided by mitochondria, as they carry out the chemical reaction of aerobic respiration
Special carrier protein muscles are needed in the membrane
Co-ordination and response
Homeostasis
The maintenance of a constant internal environment
Hormones
Kidneys
Pituitary gland
ADH is made
Controls water absorbed by kidney
The Heart/ Blood vessels
Adrenal body (gland)
Adrenaline is made
Prepares body for action (fight or flight)
Liver
Pancreas (gland)
Insuline is made
Contols blood sugar levels
Liver/Kidneys
Thyroid
Thyroxine is made
Metabolic stimulant
Responses
Pin stimulus
Sense organ
Receptor cell
Sensory neurone
Brain
Spinal cord
Motor neurone
Response- Reflex reactions
Laugh
Cry
Movement e.g muscle contraction
Sequence of reflex arc
Stimulus is detected by receptors
Signal reacher muscle or gland
Signal passes from relay neurone to motor neurone
Signal reacher muscle (or gland)
Muscle responds (or gland releases chemicals)
Photoreceptor
Responds to light
Red cells in retina of eye
Chemoreceptor
Chemicals
Taste buds
Stimulus- A change in the environment
Receptor- Recieves stimuli and transdeuces them
Sensory neurone- Carries info as electrical impulses
Central nervous system- Understands electrical impulses and decides what to do with them
The Eye
Pupil
Iris
Cornea
Aquaeous humor
Vitraeous humor
Blind spot
Optic nerve
Retina
Rod cells
Cone cells
Ecology and environment
Where is nitrogen?
The air (72%)
Hair (cells and cell membranes)
Plants
Urine
Fertilisers
Ammonia
Red blood cells (haemoglobin)
Proteins
DNA
Adding/ Removing carbon dioxide
ADD
Respiration
Combustion
Decomposition
REMOVING
Photosynthesis
Fossilisation
Dissolving carbon dioxide in oceans
Transport in humans
ARTERY- Oxygenated blood away from the heart
VEIN- Deoxygenated blood to the heart
Recursos multimedia adjuntos
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b8383c0d-16ae-4731-a068-649aeb4712c2 (image/jpg)
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