Term
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Definition
| The break down of large insoluble molecules into small soluable molecules so that they can be absorbed into the blood stream. |
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Term
6.1.2 Why are enzymes needed for digestion? |
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Definition
| Enzymes allow the reaction to take place at body temperature. |
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Term
6.1.3 Name the source, substrate, products and optimum pH of: Salivary amylase |
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Definition
Salivary Amylase - Source: Salivary glands
- Substrate: Starch
- Product: Maltose
- Optimum pH: 7 (6-7)
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Term
6.1.3 Name the source, substrate, products and optimum pH of: Pancreatic Amylase |
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Definition
Pancreatic Amylase- Source: Pancreas
- Substrate: Starch
- Product: Maltose
- Optimum pH: 7 (7-8.3)
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Term
6.1.3 Name the source, substrate, products and optimum pH of: Pepsin (a protease) |
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Definition
Pepsin- Source: Pancreas and Stomach wall
- Substrate:Protein
- Product:Amino acids
- Optimum pH: 2 (1-3.5)
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Term
6.1.3 Name the source, substrate, products and optimum pH of: Lipase |
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Definition
Lipase- Source: Pancreas
- Substrate: Lipids
- Product: Fatty Acids and Glycerol
- Optimum pH: 7 (7-8.3)
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Term
6.1.4 Label the digestive system: [image] [image][image] |
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Definition
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Term
6.1.5 What is the function of the stomach? |
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Definition
| Both chemical and mechanical digestion. When food enters the stomach it is mixed with hydrochloric acid and protease. The walls of the stomach are also muscular and contract rhythmically to break food into smaller lumps. |
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Term
6.1.5 What is the function of the small intestine? |
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Definition
| Pancreatic juce is secreted into the small intestine containing protease, amylase and lipase. The 3 main groups of macromolecule are digested here. Digested food is also absorbed in the small intestine via the villi and into the blood stream. |
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Term
6.1.5 What is the function of the large intestine? |
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Definition
| The large intestine is where the majority of the remaining water is absorbed into the blood stream. |
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Term
6.1.6 Define absorbtion... |
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Definition
| Absorbtion is the movement of small soluable molecules from the small intestine into the blood stream. |
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Term
6.1.6 Define assimilation... |
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Definition
| Assimilation is the build up of new molecules from the absorbed material. |
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Term
6.1.7 Name the adaptations of the villus and explain their purpose... [image] |
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Definition
- Large surface area: Allows faster absorbtion.
- Good blood supply: Allows products of digestion to be carried away quickly.
- Single cell membrane: Allows food to absorb through quickly.
- Micro vili: Increases surface area therefore faster etc...
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Term
6.2.1 Label the diagram... [image] |
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Definition
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Term
6.2.2 The coronary arteries supply the _x_ with oxygen and nutrients. |
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Definition
| The coronary arteries supply the heart muscle with oxygen and nutrients. |
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Term
6.2.3 Study the animation in the link, take note of: |
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Definition
| http://library.med.utah.edu/kw/pharm/hyper_heart1.html |
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Term
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Definition
Tissue that contracts without stimuation Once one heart muscle cell contracts it causes the rest of the cells around it to also contract and so the muscle beats almost simultaneously at the rate of the fastest. |
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Term
| What is the pacemaker and where is it found? |
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Definition
- The pacemaker (also known as the sinoatrial node-SA node) is the part of the heart that sets the rate of contractions.
- It is found in the wall of the right atrium
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Term
| Would a sympathetic nerve impulse increase or decrease the heart rate? |
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Definition
| A sympathetic nerve impulse would increase the heart rate. |
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Term
| Would a parasympathetic nerve impulse increase or decrease the heart rate? |
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Definition
| A parasympathetic nerve would decrese the heart rate. |
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Term
| What hormone can be used to increase heart rate? |
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Definition
Epinephrine (also known as adrenaline) increases the heart rate. |
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Term
Label the structure and function of an artery: [image] |
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Definition
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