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Tuesday, June 1

  1. page Controlling life edited ... and the peripheral nervous system (PNS). {cience.png} The PNS has nerves an receptors. Recept…
    ...
    and the peripheral nervous system (PNS).
    {cience.png} The PNS has nerves an receptors. Receptors are cells or modified nerve endings that can respond to a stilulus. The receptors detect stimuli and send electrical impulses to the CNS. The five sense organs8eyes, skin, ears, nose and tongue) are important receptors organ of the nervous system.The nervou system contains many nerve cells called neurones.
    ...
    OF NEURONES:
    -Sensory neurones carry impulses from a receptor to the CNS.
    -Motor neurones carry impulses from a receptor to the CNS to a muscle or a gland. These cause a response in the body, for example a muscle will contract and move a limb.
    ...
    Plants do not have reflexes but do repond to stimulisuch a light.
    Sunflowers trak the sun as he earth moves during the day.


    -the ear
    Our
    {simple-reflex-action.jpg}
    -THE EAR
    ​Our
    ear help
    A sound results in the compression of air forming a sound wave. This is a pattern, which travels like ripples on a pond when a stone in thrown in. The air is very sensitive. A change in air preassure, makes the eardrum bulge outwards. When we swallow or yawn the eardrum moves back to the original position. When we move our head the fluid in the semi-circular canals moves. Each canal has a small chamber called ampulla at one end that is lined with sensitive hair cells.
    INSIDE THE EAR
    (view changes)
    1:31 pm
  2. page Controlling life edited ... -The central nervou system (CNS) the brain and the spinal cord form the CNS which interprets a…
    ...
    -The central nervou system (CNS) the brain and the spinal cord form the CNS which interprets and coordinates the information.
    {http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19588.jpg}
    ...
    nervous system (PNS)(PNS).
    {cience.png} The PNS has nerves an receptors. Receptors are cells or modified nerve endings that can respond to a stilulus. The receptors detect stimuli and send electrical impulses to the CNS. The five sense organs8eyes, skin, ears, nose and tongue) are important receptors organ of the nervous system.The nervou system contains many nerve cells called neurones.
    THERE ARE TWO EXAMPLES OF NEURONES:
    -Sensory neurones carry impulses from a receptor to the CNS.
    -Motor neurones carry impulses from a receptor to the CNS to a muscle or a gland. These cause a response in the body, for example a muscle will contract and move a limb.
    SENSORY NEURONE
    {sensory_neuron.gif}
    MOTOR NEURONE
    {Anatomy_and_physiology_of_animals_Motor_neuron.jpg}
    Nerve cells are made up of a cell body that contains the nucleus and a long fibre called an axon.The poition of the cell body is different in sensory neurones and motor neuones.The dendrites at the ends of the nerve cell body are very important.These interconnct with other neurones so that nerve impulses can pa from one neurone to anothe ,but only in one direction.
    Neurones don't touch each other.Synapses are junctions in-between neurones. The synapses pa informatiopn between neurones. Susbtances are releaed from the end of the neurone. The substances diffuse acrothe gap between the two neurones and then set up an impilse in the next neurone. Substances like alcohol reduce the speed of the substances crossing the gap.This slows down he body's reactions.

    ​ -Reflex action.
    A rapid automatic response to a stimulus is called a reflex action. Whenyou move your hand away from a hot object you are responding to a heat stimulus.
    The impilses are sent from the hand to the spinal cord then o the muscle, wich moves the hand .The impulses take the shortest posible route which is called a reflex arc. There are different types of reflexes.
    Plants do not have reflexes but do repond to stimulisuch a light.
    Sunflowers trak the sun as he earth moves during the day.


    -the ear
    Our ear help us to balance.
    (view changes)
    1:27 pm
  3. page Food and nutrition edited ... {http://www.definicionabc.com/wp-content/uploads/fotosintesis.gif} The leave is the organ wh…
    ...
    {http://www.definicionabc.com/wp-content/uploads/fotosintesis.gif}
    The leave is the organ where the plant makes food. This process is called photosynthesis.Photosynthesis uses light energy from the sun to combine water with carbon dioxide. The products are oxygen and glucose (a type of sugar). Glucose is used by the plant to make every other substances the plant needs.
    ...
    + carbon dioxide--------glucousedioxide-------glucouse + energy.
    USE OF FOOD:
    Glucose is used by the plant as a supply of energy.The glucose is made into sucrose to carry away from leaf. It can be stored as starch for later use or converted into other chemiclas like celloluse for the cell walls. Some of this cellulose is combined with minerals to make proteins needed for growth. Fats and oils found in the seeds are also made from glucose.
    ...
    Too little food causes tiredness and wasting diseases which are most common in developing countries. Eating most of the carbohydrate you need as sugar is bad for your teeth.
    {cooltext459702139.png}
    ...
    bodies. . THE
    THE
    DIGESTIVE SYSTEM:
    ...
    and then absorbed. THEabsorbd.
    THE
    MOUTH AND
    Ingestion is the act of taking food into the mouth. It is chewed to break it down into smaller pieces and to mix in with saliva. The smaller pieces are easier to swallow and have a bigger surface area for enzymes to break down the food.
    The saliva contains mucus which helps to lubricate the food. It also contains an enzyme an enzyme which breaks down starch into simple sugar molecules. Enzymes are special substances that speed up chemical reactions. They are proteins and each enzyme has very specific shape.
    This special shape means that a substrate molecules can fit into the enzyme and be broken down in digestion. Enzymes are useful in digestion because they help to break down the food. The enzyme in your saliva is called amylase and it starts work on digesting food in your mouth.
    Teeth are also important. Humans have two set sets of teeth. When young, the jawgrowths but the teeth cannot. The second set is larger than the first and there are 12 more teeth in total. If you look after your teeth this makes sure you can chew your food forall your life. The food is pushed down the oesophagus. {http://image.tutorvista.com/content/nutrition/tooth-internal-structure.jpeg} {digestive_system.gif}
    ...
    AND INTESTINE: Food
    Food
    has been
    Lipases-break down fats
    Carbohydrases-break down carbohydrates.
    ...
    Most water is absorbed into the blood. Some of the bacteria in the large intestine can use the remains of the food to make some vitamins the body needs. These are absorbed with the water. Food needs the fibre to help it to move throught the large intestine. The feaces stored in the last part of the large intestine and must removed(egestion). Egestion means getting rid of undigested food that has not absorbed into the cells of the body.
    {http://www.sjhsyr.org/sjhhc/hidc07/graphics/images/en/19220.jpg} {http://www.colorado.edu/intphys/Class/IPHY3430-200/image/villi.jpg}
    Tis photographThis photographs shows an intestine Here we can see the villi with each microintestaines, containig villi.
    (view changes)
    12:58 pm
  4. file cience.png uploaded
    12:44 pm
  5. 12:41 pm
  6. page Food and nutrition edited ... Too little food causes tiredness and wasting diseases which are most common in developing coun…
    ...
    Too little food causes tiredness and wasting diseases which are most common in developing countries. Eating most of the carbohydrate you need as sugar is bad for your teeth.
    {cooltext459702139.png}
    ...
    then absorbed. THETHE MOUTH AND
    Ingestion is the act of taking food into the mouth. It is chewed to break it down into smaller pieces and to mix in with saliva. The smaller pieces are easier to swallow and have a bigger surface area for enzymes to break down the food.
    The saliva contains mucus which helps to lubricate the food. It also contains an enzyme an enzyme which breaks down starch into simple sugar molecules. Enzymes are special substances that speed up chemical reactions. They are proteins and each enzyme has very specific shape.
    This special shape means that a substrate molecules can fit into the enzyme and be broken down in digestion. Enzymes are useful in digestion because they help to break down the food. The enzyme in your saliva is called amylase and it starts work on digesting food in your mouth.
    Teeth are also important. Humans have two set sets of teeth. When young, the jawgrowths but the teeth cannot. The second set is larger than the first and there are 12 more teeth in total. If you look after your teeth this makes sure you can chew your food forall your life. The food is pushed down the oesophagus. {http://image.tutorvista.com/content/nutrition/tooth-internal-structure.jpeg} {digestive_system.gif}
    =DIGESTIONDIGESTION IN THE
    ...
    three ones
    Lipases-break down fats
    Carbohydrases-break down carbohydrates.
    Proteases-digest protein.
    =
    {http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19092.jpg}
    The small intestine has a massive surface area for absorption of the digested food molecues. The surface area is increased by the following:
    ...
    Most water is absorbed into the blood. Some of the bacteria in the large intestine can use the remains of the food to make some vitamins the body needs. These are absorbed with the water. Food needs the fibre to help it to move throught the large intestine. The feaces stored in the last part of the large intestine and must removed(egestion). Egestion means getting rid of undigested food that has not absorbed into the cells of the body.
    {http://www.sjhsyr.org/sjhhc/hidc07/graphics/images/en/19220.jpg} {http://www.colorado.edu/intphys/Class/IPHY3430-200/image/villi.jpg}
    ...
    micro villi.
    (view changes)
    11:53 am
  7. page Food and nutrition edited ... Too little food causes tiredness and wasting diseases which are most common in developing coun…
    ...
    Too little food causes tiredness and wasting diseases which are most common in developing countries. Eating most of the carbohydrate you need as sugar is bad for your teeth.
    {cooltext459702139.png}
    ...
    then absorbed. THE THE MOUTH AND
    Ingestion is the act of taking food into the mouth. It is chewed to break it down into smaller pieces and to mix in with saliva. The smaller pieces are easier to swallow and have a bigger surface area for enzymes to break down the food.
    The saliva contains mucus which helps to lubricate the food. It also contains an enzyme an enzyme which breaks down starch into simple sugar molecules. Enzymes are special substances that speed up chemical reactions. They are proteins and each enzyme has very specific shape.
    This special shape means that a substrate molecules can fit into the enzyme and be broken down in digestion. Enzymes are useful in digestion because they help to break down the food. The enzyme in your saliva is called amylase and it starts work on digesting food in your mouth.
    Teeth are also important. Humans have two set sets of teeth. When young, the jawgrowths but the teeth cannot. The second set is larger than the first and there are 12 more teeth in total. If you look after your teeth this makes sure you can chew your food forall your life. The food is pushed down the oesophagus. {http://image.tutorvista.com/content/nutrition/tooth-internal-structure.jpeg} {digestive_system.gif}
    =DIGESTION IN THE STOMACH AND INTESTINE: Food has been salowed entres to the stomach.The average time for food to stay in the stomach is about four hours.The churning of the stomach helps to physically break up of foood and to mix it with the gastric juice produced by gland in the walls. The juice us mainly hydrocloric acid which kills most micro-organism in the food.An enzyme breaks down proteins into smaller molecules. The acid mush is released from the stomach in to the small intestinein small amounts.In the small intestine many differnet enzyme are used to break down the large molecules in food. We can name three ones
    Lipases-break down fats
    Carbohydrases-break down carbohydrates.
    Proteases-digest protein.
    =
    {http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19092.jpg}

    The small intestine has a massive surface area for absorption of the digested food molecues. The surface area is increased by the following:
    -It is long
    ...
    The soluble food is absorbed into the blood by diffusion. The blood goes to the liver and any poisons that have been absorbed with the digested food can be destroyed.
    Most water is absorbed into the blood. Some of the bacteria in the large intestine can use the remains of the food to make some vitamins the body needs. These are absorbed with the water. Food needs the fibre to help it to move throught the large intestine. The feaces stored in the last part of the large intestine and must removed(egestion). Egestion means getting rid of undigested food that has not absorbed into the cells of the body.
    {http://www.sjhsyr.org/sjhhc/hidc07/graphics/images/en/19220.jpg} {http://www.colorado.edu/intphys/Class/IPHY3430-200/image/villi.jpg}
    Tis photograph shows an intestine Here we can see the villi with each micro villi.

    (view changes)
    11:07 am
  8. 10:35 am

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