Guided Reading on Respiration in Different Animals

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Respiration

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Key points

• Respiration is a chemical reaction which occurs in all living cells, releasing energy from glucose.

• Aerobic respiration occurs with oxygen and releases more energy simply more slowly.

• Anaerobic respiration occurs without oxygen and releases less energy merely more apace.

Agreement respiration

Video

VOICEOVER: Agreement respiration. Do not misfile respiration with animate or to apply the scientific proper name, ventilation. Respiration is a chemic reaction. It occurs in all plant and animal cells. During this reaction, energy from glucose is released. This energy enables organisms to alive. Aerobic respiration requires oxygen. Carbon dioxide is produced as a by-product and nosotros show this using the give-and-take equation: glucose plus oxygen, produces carbon dioxide and water. Aerobic respiration produces energy, much more efficiently than anaerobic respiration, but is a slower process. Anaerobic respiration does not require oxygen. Lactic acid is produced as a by-product. We show this using the give-and-take equation: glucose produces lactic acid. Anaerobic respiration produces much less energy than aerobic respiration, merely it is a much faster process.

Katie: OK, so, allow's expand on what nosotros've just heard, shall we?

Dr. Tim: Alright, Katie. So what we've already learned is that respiration is not the same as animate - it'due south a chemical reaction and information technology occurs in all living cells, all of the fourth dimension, and his energy that's released from glucose. Now, there are 2 types of respiration. Over to you, Katie.

Katie: OK. It's aerobic and anaerobic, but what's the difference betwixt them?

Dr. Tim: Perfect. Then if we look at these 2 types of respiration equally an equation, information technology'll assist us to understand ameliorate. Aerobic respiration occurs in the presence of lots of oxygen, like if we were running a marathon or something like that. And the equation that represents this reaction is glucose plus oxygen gives carbon dioxide, plus water. This is the process of releasing energy from glucose in the presence of oxygen, which occurs in all living cells.

Katie: OK, great. And what about anaerobic respiration?

Dr. Tim: So, anaerobic respiration is a little fleck dissimilar because it occurs when there is not sufficient oxygen, every bit if nosotros're doing a mad 100m dart or something like that. And the equation that represents anaerobic respiration is glucose goes to lactic acid. And this is the process of releasing smaller amounts of energy from glucose, something similar 5%, without the presence of lots of oxygen, which produces lactic acid. And we all know the feeling of aching after we've washed a mad dash, don't we.

Katie: Yeah, definitely. I mean, I'm exhausted just thinking about it, to be honest.

Dr. Tim: This oxygen debt which is known every bit excess post-practise oxygen consumption, or EPOC.

Katie: That'due south a mouthful.

Dr. Tim: It is a mouthful, yeah. EPOC, for shot. And this is why we keep on breathing deeply for a few minutes later on we end some difficult exercise, so we can we tin replenish all of the cells in our torso with oxygen.

Aerobic respiration

is non breathing. That is called . Respiration is a chemical reaction which occurs in every ane of the cells in the human trunk. It releases energy stored in glucose and without it, these cells would die.

Aerobic respiration occurs in the presence of oxygen. The equation for aerobic respiration is:

glucose + oxygen → carbon dioxide + water

respiration slowly releases lots of free energy stored in . It generally occurs in tiny parts of your cells called mitochondria which are found in the . Cells which need more than energy like sperm cells, which swim, or muscle cells which contract and relax, have more .

Did you know?

'Aerobic' does not mean 'in air' fifty-fifty though they sound the aforementioned. It means 'in the presence of oxygen.'

Anaerobic respiration

For a short period during vigorous practice, the torso's cells may not have enough oxygen. This means aerobic respiration cannot occur and anaerobic respiration happens instead. The equation for anaerobic respiration is:

glucose → lactic acid

respiration releases less free energy than aerobic respiration but it does this faster. The product of this reaction is lactic acid. This builds upwards in muscles causing pain and tiredness, which can lead to a balk.

After vigorous exercise, people continue to exhale deeply and quickly for a short period. This is chosen excess mail service-practise oxygen consumption or EPOC. It used to be called 'oxygen debt.' During this time, the lactic acid reacts with oxygen to grade carbon dioxide and water, and releases the rest of the energy originally in the glucose.

During exercise, energy is released

Comparing aerobic and anaerobic respiration

	Reactant(s)	Products(due south)	Rate of reaction	Energy released
Aerobic respiration	Glucose, oxygen	Carbon dioxide, water	Slow	More than
Anaerobic respiration	Glucose	Lactic acid	Fast	Less

Examination your knowledge

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Source: https://www.bbc.co.uk/bitesize/topics/zvrrd2p/articles/zdqx2v4