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Biology end of year intervention task - Coggle Diagram
Biology end of year intervention task
Reflexes and synapses
Synapses
Synapse is a connection between two neurons
The nerve impulse is transferred by chemicals called neurotransmitters, which diffuse across the gap
Bro, transmitter is then set off a new electrical signal in the next neurone
Transmission of the nervous impulse is sometimes slow down when the synapse is unable to defuse neurotransmitters.
Reflexes
A reflex is an automatic and extremely quick response to stimuli
This is a very important for the body, they can help by protecting the body when stimuli became dangerous.
The system of a reflex starts at the stimuli, e.g. a bee sting. The sensory neuron picks up stimuli and head towards the CNS at the CNS a relay neuron, then takes the electrical charge to a motor neuron, which then takes the electrical charge to an effector where responses carried out carried out.
Enzyme Reactions
And he used to break down large molecules, such as…
An enzyme called carbohydrases Convert carbohydrates into simple sugars. Amylase is an example of an enzyme that breaks down carbohydrates into starch.
An enzyme group called proteases, help to convert proteins into amino acids
An enzyme called lip eases, helps convert lipids into glycerol and fatty acids.
What are enzymes?
It’s a biological catalyst
There are thousands of different chemical reactions happening in the body at all times, therefore enzymes are extremely important to break down larger molecules, especially in the digestive system from food and any other minerals.
Lens
Different eye conditions
Long sightedness is where people are unable to focus on their objects. This occurs when the lens is the wrong shape and doesn’t bend light enough. All the eyeball is too short. Light from near object is brought into focus behind the retina but objects further away will focus perfectly fine. You can use glasses or contact lenses with a convex lens to correct long sightedness.
Shortsightedness is where people are unable to focus on distant objects. This happens when the lens is the wrong shape and Benz like too much or the eyeball is too long. Light from distant objects is brought into focus in front of the retinal, but closer objects are focused perfectly fine. You can use glasses or contact lenses with a concave lens to correct it.
Colour blindness is where people are unable to see colour or differentiate from different colours. It’s caused when the cones which are receptor cells on the back of the retina are not working for the particular purpose. As the specialised cones which help the brain see colour, the correct colours and not seen properly from the colour blind person.
A cataract is where a cloudy patch appeared on the land. This stops light rays from being able to enter the eye normally. People Cataracs am likely to see blurry vision as the light rays and are unable to focus on the back of the retina.
Different glasses lens and there purposes
Convex lenses are used to help long sightedness. This limits the amount of refraction of the light rays onto the retina. Therefore, the light rays will meet properly on the focal point on the back of the retina.
Cave lenses are used to cure shortsightedness. As it’s more rounded, it helps to refract the light more, so the light rays properly meet on the focal point on the back of the retina.
The different knobs on a microscope
The objective lens and knob on a microscope helps to move the stage which will have the slide and specimen on it. The objective lens is used to make larger adjustments and then you can use find distance lens to focus on the specimen.
As said, the fine adjustment lens helps to focus the specimen through the eyepiece therefore, as it does small adjustments you are able to focus on the specimen
Another way to work out, the total magnification is by tiding together, the final adjustment lens total and the objective lens total.