dietary sources
Pasta, rice, potatoes provide
carbohydrates
the taking of substances,
e.g. food and drink, into the body
ingestion
this enzyme breaks down starch
amylase
Use this test to see if CO2 is present
limewater test
What is the word equation for aerobic respiration?
glucose + oxygen → carbon dioxide + water
You could eat avocado or fish or nuts to get these
fats and oils
uptake and use of nutrients by cells
assimilation
these are the two enzymes that break down proteins and fats
protease (pepsin) and lipase
What effect does exercise have on breathing?
increased rate and depth
What is the balanced chemical equation for aerobic respiration
C6H12O6 + 6O2 → 6CO2 + 6H2O
Eating fruits and vegetables helps to provide this important nutrient to keep you regular
fibre(roughage0
the removal of undigested food from the body as faeces
egestion
which organ secretes protease?
pancreas
Inspired air contains about___________ oxygen, while expired air has a lower oxygen content, approximately____________.
21%,15-16%.
Which releases more energy aerobic or anaerobic?
aerobic
This vitamin can be found in oily fish, including salmon, mackerel, and sardines . But often we get it from fortified milk.
Vitamin D
Name the four associated organs to the digestive system
salivary glands,
pancreas, liver and gall bladder
responsible for killing harmful microorganisms in food and providing an acidic pH for optimum enzyme activity of proteases in the stomach
hydrochloric acid
Describe the features of gas exchange surfaces in humans:
large surface area, thin surface, good blood supply and good ventilation
State the word equation for anaerobic respiration in humans.
glucose → lactic acid
This is the disease that results from a lack of vitamin C
Scurvy
State the order that food travels in the alimentary canal
mouth, esophagus, stomach, small intestine, large intestine
Responsible for neutralising the acidic mixture of food and gastric juices entering the duodenum from the stomach, and providing a suitable pH for enzyme action in the small intestine
bile
Which gas do we breathe out in highest concentration?
Nitrogen
When lactic acid builds up in muscles and blood during vigorous exercise causing _________________
oxygen debt