Respiration

Learning Targets Cell respiration is the controlled release of energy from organic compounds to produce ATP ATP from cell respiration is immediately available as a source of energy in the cell Anaerobic cell respiration gives a small yield of ATP from glucose Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose

What is cellular respiration? Cellular respiration is the controlled release of energy from organic (carbon containing) compounds to produce ATP

ATP (Adenosine Triphosphate) ATP is often known as the “energy carrier” or “energy currency” of the cell. ATP is a high energy molecule that provides energy for cellular functions. ATP can be used as energy immediately after it is produced.

What do cells need energy for? Cells need energy for three main tasks

1) Synthesizing large molecules like DNA, RNA, and proteins.

2) Pumping molecules or ions across membranes by active transport

3) Moving things around inside the cell, such as chromosomes, vesicles, or in muscle cells the protein fibers that cause muscle contraction.

What is respiration?

On a molecular level, why do people eat food?

Does ATP need to be converted to another molecule before it is used as a source of energy?

Anaerobic Respiration In anaerobic respiration glucose is broken down without using oxygen. The amount of ATP produced is small, but it can be produced very quickly. It is most commonly useful when…

A short, rapid burst of ATP production is needed

Oxygen supplies run out in respiring cells

The environment is deficient in oxygen

The products of Anaerobic respiration vary depending on the organism Humans and other animals Yeast and plants Ethanol

Aerobic Respiration Aerobic respiration is the breakdown of glucose with oxygen. In aerobic respiration glucose is more completely broken down and produces a LOT more ATP. Glucose + Oxygen Carbon Dioxide + Water ADP to ATP

Examples of aerobic respiration

Products Reactant Anaerobic Respiration Aerobic Respiration or Ethanol Carbon Dioxide Water

How many C-H bonds are present in glucose?

How many C-H bonds are present in Lactate?

How many C-H bonds are present in water and carbon dioxide?

Which process would you predict converts more of the high energy C-H bonds in glucose into ATP?

Products Reactant Anaerobic Respiration Aerobic Respiration or Ethanol Carbon Dioxide Water

Which process occurs without oxygen?

Which process occurs with oxygen?

Which process produces a lot of ATP?

Which process produces a little ATP?

Do humans use aerobic or anaerobic respiration?

Draw an example of aerobic respiration and an example of anaerobic respiration that we have not used so far in class

Anaerobic respiration Both aerobic and anaerobic respiration Neither You discover a new bacterium that lives 3 feet under the layer of topsoil. You name it Bacteria hipsteria because it was so deep underground that no one had heard of it before. Which of the following processes would you expect to find in the bacteria? Aerobic respiration Anaerobic respiration Both aerobic and anaerobic respiration Neither

Why is it you can only sprint for a short distance but you can jog for a long distance?