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Biology AQA B2&B3 Question Game 10th June 2016

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Explain how sweating helps to keep our body temperature relatively constant. (2 marks)
Original post by ihatehannah
negative pressure system, a vaccum causes the thorax to expand and air to be sucked in, then the vaccum is released and the thorax relaxes and ribcage moves inwards and then you exhale, now I think they just mechanically force the air into your lungs using a tube.


Thats right, i always get confused with this stuff!
now: The air is pumped into the lungs which expands ribcage and when the doctors etc stop pumping air in the rib cage relaxes pushing air out
I find this website quite useful because it has lots of past paper questions for each topic and answers: http://www.logs.uk.com/our-community/pupils/subject-departments/biology-department
Original post by hafsa473
Explain how sweating helps to keep our body temperature relatively constant. (2 marks)


when temps get too high, sweat is released and evaporates and the cooling effect cools our skin.
Original post by hafsa473
Explain the cause of diabetes and how it is controlled. (3 marks)


Type 1 diabetes is caused by the pancreas producing little or no insulin. it is controlled by insulin injections, limit the intake of foods rich in carbohydrates and do more regular exercise.

Q. Describe the digestive system (6 mark)?
Original post by hafsa473
I find this website quite useful because it has lots of past paper questions for each topic and answers: http://www.logs.uk.com/our-community/pupils/subject-departments/biology-department


thanks :smile:
Give two conditions necessary for photosynthesis apart from a suitable temperature rangeand the availability of water and carbon dioxide. (2 marks)
How is mycoprotein made?
Original post by hafsa473
Give two conditions necessary for photosynthesis apart from a suitable temperature rangeand the availability of water and carbon dioxide. (2 marks)


- amount of light/ light intensity
idk the other one of the top of my head?
Original post by siobhanx13
How is mycoprotein made?


fusarium put in a fermenter, supplied with glucose and oxygen so it can aerobically respire and then the mycroprotein is harvested and purified.
what are xylem and pholem tissues made from.
Original post by siobhanx13
How is mycoprotein made?


Fusarium reacts with glucose syrup and carries out aerobic respiration which then produces mycoprotein which is collected and purified
Explain what an 'iron lung' is?
Original post by siobhanx13
- amount of light/ light intensity
idk the other one of the top of my head?


the mark scheme says:
any two of
• (presence of) chlorophyll or (amount of) chloroplastsaccept green leaves (or other green parts)
• (sufficient) light (intensity)
• (light) of a suitable wavelengthany light other than green lightdo not credit Sun’s energy or sunshine or Sun
Original post by ihatehannah
fusarium put in a fermenter, supplied with glucose and oxygen so it can aerobically respire and then the mycroprotein is harvested and purified.


nitrogen is also supplied (oxygen with nitrogen as ammonia) and other minerals but idk how much detail you'd need to put in the exam :smile:
Original post by hafsa473
the mark scheme says:
any two of
• (presence of) chlorophyll or (amount of) chloroplastsaccept green leaves (or other green parts)
• (sufficient) light (intensity)
• (light) of a suitable wavelengthany light other than green lightdo not credit Sun’s energy or sunshine or Sun


ok thanks :smile:
Original post by jazz_xox_
Explain what an 'iron lung' is?


An iron lung is a giant case from the neck to the abdomen. Air is pumped out of the case which causes the pressure to drop/decrease and the lungs expand drawing air in
What are the two minerals plants need and what are they used for?
Original post by siobhanx13
Type 1 diabetes is caused by the pancreas producing little or no insulin. it is controlled by insulin injections, limit the intake of foods rich in carbohydrates and do more regular exercise.

Q. Describe the digestive system (6 mark)?


So we mechanically break down food in our mouth using our teeth. The salivary glands prduce amylase enzymes.
Then the food goes down the oesophagus and into the stomach where protease (pepsin) is produced. Hydrochloric acid is also present which kills bacteria and gives the right pH for protease.
Liver produces bile, which emulsifies fats and neutralises the pH in the stomach. The Gall bladder stores the bile. The pancreas produces protease, amylase, and lipase which is relasesd into the small intestine. The small intestine is where digested food is absorbed from the digestive system into the blood. The large intestine is where excess water is absored from the food. In the rectum, gaeces is stored before they get released as waste.
Original post by hafsa473
So we mechanically break down food in our mouth using our teeth. The salivary glands prduce amylase enzymes.
Then the food goes down the oesophagus and into the stomach where protease (pepsin) is produced. Hydrochloric acid is also present which kills bacteria and gives the right pH for protease.
Liver produces bile, which emulsifies fats and neutralises the pH in the stomach. The Gall bladder stores the bile. The pancreas produces protease, amylase, and lipase which is relasesd into the small intestine. The small intestine is where digested food is absorbed from the digestive system into the blood. The large intestine is where excess water is absored from the food. In the rectum, gaeces is stored before they get released as waste.


Brilliant answer!!!

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