2.8 Cellular Respiration Flashcards Preview

IB Biology HL > 2.8 Cellular Respiration > Flashcards

Flashcards in 2.8 Cellular Respiration Deck (9)
Loading flashcards...
1

Define cellular respiration.

The controlled release of energy from organic compounds to produce ATP.

2

How does ATP store and release energy.

ATP's energy is stored in its third phosphate bond. By breaking this bond, ATP releases energy and becomes ADP.
ATP ADP+P

3

What does heat have to do with ATP usage?

When energy from ATP is used from cells, it is ultimately converted to heat. Energy is released and not conserved such that ATP must be continuously produced.

4

Define anaerobic respiration.

Incomplete intracellular breakdown of glucose or another organic compound in the absence of oxygen that releases energy; cellular respiration without oxygen.

5

When is anaerobic respiration useful?

-When a short rapid burst of ATP production is needed
-When oxygen supplies run out in respiring cells
-In environments that are deficient of oxygen

6

What are the products of anaerobic respiration in humans and yeast & plants?

Humans: glucose --(ADP->ATP)--> lactate
Yeast and plants: glucose --(ADP->ATP)--> ethanol + CO2

7

What is yeast and where is it found?

Unicellular fungus that occurs naturally in habitats where glucose or other sugars are available

8

What is it that limits the amount of anaerobic respiration that can take place?

There is a limit to how much lactate the human body can sustain.

9

Write the chemical equation for aerobic respiration.

C6H12O6 + 6O2 --(ADP->ATP)--> 6CO2 + 6H20