Intro to Ex Phys and Review of Metabolism/Fatigue

Question 1

Functional Requirements for community living

• amb ___
• perform/tolerate _____
• ambulate at ____ m/s
• carry ____

Answer 1

• 150’
• transfers
• 1.3
• 6.7

Question 2

metabolism

Answer 2

sum of all chemical rxns in a living organism

Question 3

bioenergetics

Answer 3

transfer and utilization of energy in biological systems

Question 4

1st law of thermodynamics and equation

Answer 4

energy can neither be created nor destroyed

energy in=energy out (work +heat) +/- energy stored

Question 5

2nd law of thermodynamics

Answer 5

all processes move from ordered to disordered states

-randomness (entropy) increases

Question 6

Reactions occur spontaneously if they are ______

Answer 6

energy yielding (favorable)- delta G

Question 7

how are unfavorable (energy requiring)- delta G>0 driven?

Answer 7

by coupling them with energy yielding reactions

Question 8

As exercise intensity increases, we shift from utilizing predominantly ____ to _____

Answer 8

fat to CHO

Question 9

CHO advantages (5)

Answer 9

• 5.1 kcal/liter O2
• metabolized aerobically and anaerobically
• rapid metabolic pathway
• stores ^ with training and diet
• can be sole energy source during heavy exercise

Question 10

CHO disadvantages (4)

Answer 10

• stored in small amounts with lots of H2O
• anaerobic metabolism increases lactate
• muscle cells need internal glycogen stores
• when depleted, can’t continue moderate exercise.

Question 11

Fat advantages (3)

Answer 11

• greatest energy value (9.3 kcal/g)
• stored in large amounts
• stable energy source

Question 12

Fat disadvantages (5)

Answer 12

-caloric value in muscle

Question 13

For every 1 g of glycogen, ___ g of H2O is stored

Answer 13

2.7

Question 14

Time to exhaustion @ 70% VO2max (3 L/min)

• CHO
• fat
• protein

Answer 14

• 2-2.5 hours
• 3-5 days
• 2.5 days