13. Intro to Metabolism

Question 1

Define metabolism.

Answer 1

All the chemical reactions in the body.

Uses energy.

Question 2

Define anabolism.

Answer 2

Synthesis of new larger molecules from smaller precursors.

Uses energy.

Question 3

Define catabolism.

Answer 3

Break down of larger molecules into smaller ones.

Releases energy.

Question 4

What can AMP be used as a marker of?

Answer 4

Low energy state

Question 5

Erythrocytes only carry out anaerobic metabolism.

True or False?

Answer 5

TRUE

no mitochondria

Question 6

How do adipocytes respond to high levels of glucose?

Answer 6

Store it as triglycerides.

Broken down to fatty acids + glycerol when glucose levels fall.

Question 7

Fatty acids are the main energy source of cardiac muscle.

True or False?

Answer 7

TRUE

Question 8

Outline the difference in energy consumption between skeletal muscle type 1, 2a, 2b.

Answer 8

Type 1: Highly aerobic, fatty acids are main energy source.

Type 2a: Tries to be aerobic as much as possible, phosphocreatine + glycogen are sources of energy, fatty acids are main source at low exercise levels.

Type 2b: Anaerobic, phosphocreatine + glucose (from glycogen store), ‘fast-twitch’ muscle