Biology

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  • Created by: EW
  • Created on: 16-05-13 21:20
What are some features of bacteria?
single celled, cell wall, cell membrane, cytoplasm, no nucleus, DNA, e.g. Lactobacillus, Pneumococcus
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Name some features of plants.
Multicellular organisms, chloroplasts, cellulose cell walls, store carbohydrate as starch or sucrose
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Name some features of animals.
Multicellular organisms, no cell walls, store carbohydrate as glycogen
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What is the word equation for photosynthesis?
Carbon Dioxide + Water --> Glucose + Oxygen
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What is the word equation for aerobic respiration?
Glucose + Oxygen --> Water + Carbon Dioxide
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What are the different colours of hydrogencarbonate indicator?
Purple - Low Carbon Dioxide Red - Normal Carbon Dioxide Yellow - High Carbon Dioxide
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Can respiration take place at night?
Yes, respiration happens constantly in every living cell.
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Can photosynthesis take place at night?
No, there is no light energy for plants to phosynthesise with
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What is the word equation for anaerobic respiration in plants?
Glucose --> Ethanol + Carbon Dioxide
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What is the word equation for anaerobic respiration in animals?
Glucose --> Lactic acid
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When are there higher levels of carbon dioxide, day or night?
Night because respiration is taking place releasing carbon dioxide but photosynthesis is not taking place to use it up.
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What factors can limit photosynthesis?
Light intensity, carbon dioxide concentration and temperature
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Why do plants need nitrate ions?
For amino acids
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Why do plants need magnesium ions?
For chlorophyll
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What do humans need a balance of in their diet?
Proteins, carbohydrates, lipids, vitamins, minerals, water and dietary fibre
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Why do we need proteins?
Growth and repair, production of antibodies, digestion and transporting nutrients
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Why do we need carbohydrates?
Source of fuel and energy, correct working of brain, heart, CNS and immune systems
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Why do we need lipids?
Contents of cell membrane and effective cell signalling
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Why do we need Vitamin A?
Needed to make a light sensitive chemical in the retina
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Why do we need Vitamin C?
Immune system, regenerates other antioxidants, health of eyes, teeth and gums
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Why do we need Vitamin D?
Regulates amount of calcium and phosphate in body
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Why do we need Calcium?
Making teeth and bones
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Why do we need Iron?
Red blood cells, haemoglobin
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Why do we need water?
Temperature regulation, chemical reactions, cell shape and stability, transporting oxygen
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Why do we need dietary fibre?
Digestive system, speeds up excretion of waste and toxins
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What is Osmosis?
Diffusion of water molecules through a partially permeable membrane from a high to low concentration
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What is diffusion?
The passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration.
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What is Active Transport?
A kind of transport wherein ions or molecules move against a concentration gradient, which means movement in the direction opposite that of diffusion – or – movement from an area of lower concentration to an area of higher concentration. Hence, this
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What is assimilation?
The conversion of nutrients into a useful form e.g. absorption
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What is egestion?
The removal of waste products from the digestive system
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What is ingestion?
Eating
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What is excretion?
The removal of waste products e.g. urine, sweat
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What is peristalsis?
The process of wave-like muscle contractions of the alimentary tract that moves food along
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What is the alimentary canal?
The digestive tract where food (bolus) passes through so that the nutriment is digested and absorbed into the blood whereas the indigestible or nonessential portion is eliminated as waste
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What happens when you breath in?
Intercostal muscles contract pulling ribs up and out, diaphragm contracts, flattening, lower pressure inside, volume of chest cavity expands
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Other cards in this set

Card 2

Front

Name some features of plants.

Back

Multicellular organisms, chloroplasts, cellulose cell walls, store carbohydrate as starch or sucrose

Card 3

Front

Name some features of animals.

Back

Preview of the front of card 3

Card 4

Front

What is the word equation for photosynthesis?

Back

Preview of the front of card 4

Card 5

Front

What is the word equation for aerobic respiration?

Back

Preview of the front of card 5
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