Biology

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  • Created by: abster_98
  • Created on: 07-05-15 10:28
Three things that proteins acts as
Hormones, Antibodies, Catalysts
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What happens during exercise?
1. Heart rate, rate and depth of breathing increases. 2. This increases the blood flow to the muscles. 3. Thereby increasing the blood flow to the muscles. 4. And increasing the rate of removal of CO2
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What happens in mitosis?
Copies of genetic material are made. Cell divided once to form genetically identical cells
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What happens in meiosis?
Copies of genetic material are made. Cell divides twice to form four gametes, each with a single set of chromosomes. Then gametes join during fertilisation
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Pancreas and Small Intestine produce which enzymes?
Carbohydrase, Lipase, Protease
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The Salivary Glands produce which enzymes?
Carbohydrase (Amylase)
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What happens during inhalation?
The intercostal muscles contract. The ribcage expands outwards and upwards. Diaphragm contracts, pulling down to increase the volume of chest. The pressure inside the chest is lowered and the air is sucked into lungs
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What happens during exhalation?
The intercostal muscles relax. The ribcage drops inwards and downwards. The diaphragm relaxes, moving back upwards to decrease volume of chest. The pressure inside the chest is increased, so the air is forced out of the lungs
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Differences between arteries and veins.
Arteries pump blood from heart, whereas veins pump blood to heart. Arteries have thick walls with muscle to pump the blood, whereas veins have thin walls with little muscle. Veins have valves to prevent backflow of blood.
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What does the plasma transport?
CO2 from organs to lungs. Soluble products of digestion from S. Intestine to other organs. Urea from liver to kidney
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Worst conditions for transpiration and the result?
Hot, Windy and dry - causes wilting because too much water lost
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What does xylem transport?
Water and mineral ions from roots to stem and leaves
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What does phloem transport?
Dissolved sugars from leaves to rest of plant
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How does a healthy kidney produce urine?
By filtering the blood, then reabsorbing all the sugar, the dissolved ions needed by the body, as much water as the body needs. Then releasing the urea, excess ions and water as urine
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Composition of dialysis fluid????
Low Urea, Same/ideal sugar and ion concentration
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Advantages of dialysis
More available than kidney donors and does not need drugs
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Disadvantages of dialysis
Needs regular and long session. There is less freedom. A careful control of diet
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Advantages of kidney transplant
No more dialysis. No need to control diet. Freedom
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Disadvantages of kidney transplant
Finding a donor is difficult. Kidney could be rejected due to different tissue type. Need to take immunosupressants for the rest of life. This can make the person prone to illness since the person's immune system is weakened
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What is a major consequence of deforestation?
Reduction in biodiversity
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What is biodiversity?
A variety of different species living in a habitat
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Other cards in this set

Card 2

Front

1. Heart rate, rate and depth of breathing increases. 2. This increases the blood flow to the muscles. 3. Thereby increasing the blood flow to the muscles. 4. And increasing the rate of removal of CO2

Back

What happens during exercise?

Card 3

Front

Copies of genetic material are made. Cell divided once to form genetically identical cells

Back

Preview of the back of card 3

Card 4

Front

Copies of genetic material are made. Cell divides twice to form four gametes, each with a single set of chromosomes. Then gametes join during fertilisation

Back

Preview of the back of card 4

Card 5

Front

Carbohydrase, Lipase, Protease

Back

Preview of the back of card 5
View more cards

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