Lecture 2- Metabolism Introduction Flashcards Preview

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Flashcards in Lecture 2- Metabolism Introduction Deck (9)
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0
Q

What does a failure of homeostasis lead to?

A

Disease

1
Q

What are the 3 main components of daily energy expenditure?

A
  1. BMR- Basal metabolic rate- energy to support our basal metabolism
  2. Voluntary physical activity
  3. Diet-induced thermogenesis-energy required to process the food we eat
2
Q

Define homeostasis

A

The control of the internal environment within certain limits. It is a dynamic equilibrium.

3
Q

Name 4 high energy signals. What do they inhibit/activate?

A

ATP, NADH, NADPH,FAD2H.

They inhibit catabolism and activate anabolism.

4
Q

Name 5 low energy signals. What do they inhibit/activate?

A

AMP, ADP, NAD+, FAD+, NADP+. They inhibit anabolic pathways and activate catabolic pathways.

5
Q

Define catabolism

A

The breaking down of larger molecules into smaller ones- produces: precursors, reducing power and ATP. Releases energy.

6
Q

Define anabolism

A

The building up/formation of larger molecules from smaller ones. Requires energy.

7
Q

What is recommended daily allowance and what factors affect it?

A

It is the average amount/quantities of nutrients required to keep more than 97% of the population in good health. It is affected by age, gender and pregnancy status.

8
Q

Define metabolism

A

The process which derives energy and raw materials from food stuffs and uses them to support growth, repair and activity of body tissues.