1.8 Energy Systems in Muscle Cells Flashcards Preview

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Flashcards in 1.8 Energy Systems in Muscle Cells Deck (25)
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1

Contraction time of slow twitch muscles

Slow

2

Contraction time of fast twitch muscles

Quick

3

Timeframe of contraction of sliw twitch muscles

Long

4

Timeframe of contraction of fast twitch muscles

Short

5

Type of activity best suited to slow twitch muscles

Endurance eg. long distance running or cycling

6

Type of activity best suited to fast twitch muscles

Bursts eg. Weightlifting or sprinting

7

Where ATP is generated for slow twitch muscle fibres

Aerobic respiration

8

Where ATP is generated for fast twitch muscle fibres

Glycosis

9

Number of mitochondria in slow twitch muscle

Many

10

Number of mitochondria in fast twitch muscle

Few

11

Blood supply to slow twitch muscle

Rich/ high

12

Blood supply to fast twitch muscle

Low

13

Main storage fuel for slow twitch muscle fibres

Fats

14

Main storage fuel for fast twitch muscle fibres

Storage carbohydrates like glycogen or creatine phosphate

15

What muscle contraction requires

ATP

16

Role of creatine phosphate

Breaks down to provide energy and a phosphate (used to convert ADP to ATP)

17

During activity when creatine phosphate runs out

After 10 seconds of strenuous muscle activity

18

What creatine phosphate allows athletes to do

Sustain maximum muscle contractions for a short period of time

19

The role of ATP (in creatine phosphate system) when demand for energy in muscle cells is low (eg. during rest)

Acts as a source of phosphate and energy for the phosphorylation of creatine into creatine phosphate

20

Under what conditions is pyruvate converted into lactic acid

•During vigorous exercise
•Muscle cells aren't getting sufficient oxygen
(Oxygen is needed to support the electron transport chain)

21

What the transfer of hydrogen from NADH results in

The conversion of pyruvate (pyruvic acid) into lactic acid

22

When the NADH used to produce lactic acid are produced

During glycosis

23

What lactic adic accumulating in the muscle cells results in

Muscle fatigue and oxygen debt

24

When lactic acid is converted back into pyruvate

Omce the oxygen debt is repaid and excersise is complete

25

With energy provided from aerobic respiration, what lactic acid is converted back into

•Pyruvate
•Glucose in the liver