Anatomy & Physiology Year 2 ONLY Flashcards Preview

Barton Peveril A Level PE > Anatomy & Physiology Year 2 ONLY > Flashcards

Flashcards in Anatomy & Physiology Year 2 ONLY Deck (75)
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1

What is the only form of USABLE energy in the body?

Adenosine Triphosphate (ATP)

2

Which enzyme breaks down ATP?

ATPase

3

What does the breakdown of ATP result in?

ADP + P + ENERGY

4

What type of reaction is the breakdown of ATP?

Exothermic

5

What is an exothermic reaction?

A compound is broken down into smaller elements as energy is released

6

How long does the ATP stored in the body last?

Approximately 3 seconds

7

Which systems works to resynthesise ATP once the body's stores run out?

ATP-PC system

8

What is the source of the ATP-PC system?

Phosophocreate (PC)

9

Which enzyme breaks down PC?

Creatine kinase

10

What does the breakdown of PC produce?

Creatine, Phopshate & ENERGY

11

What is the purpose of the energy produced through the breakdown of PC?

To help resynthesise ADP + P into ATP

12

Where does the coupled reaction involved in the ATP-PC system take place?

Muscle sarcoplasm

13

What three types of reaction are involved in the ATP-PC system?

Endothermic, Reversible, Coupled

14

What is an endothermic reaction?

When a group of elements combine to form a compound/the reaction ABSORBS energy

15

What is a coupled reaction?

Where the products of one reaction are used by another

16

Where is there an example of a coupled reaction in the ATP-PC system?

Where the products of the breakdown of PC (Exothermic) are used to resynthesise ADP into ATP (Endothermic)

17

How much PC is there stored in the body?

Approximately 8 seconds

18

Describe 5 advantages of the ATP-PC system

- Provides ATP quickly
- Provides energy for fast, high intensity activities.
- No harmful by-products
- PC readily available in muscle cell
- No delay for oxygen

19

Describe 3 disadvantages of the ATP-PC system

- Only a small amount of PC stored in muscle cells
- Small amount of ATP is resynthesized (1 mole)
- Only provides energy for maximum of 8-10 seconds

20

What is the energy yield of the ATP-PC system?

1:1

21

What is the main source/fuel for the Glycolytic System?

Stored muscle GLYCOGEN

22

What is the name of the enzyme that converts stored Glycogen into Glucose?

Glycogen Phosphorylase (GPP)

23

What is glucose converted into in the glycolytic system?

Pyruvic Acid

24

What is the name of the enzyme that converts glucose into pyruvic acid?

Phosphofructokinase (PFK)

25

What is also produced as a result of converting glucose into pyruvic acid?

2 ATP

26

If there insufficient oxygen, the glycolytic system is likely to be dominant. In this case what is pyruvic acid converted into?

Lactic acid

27

What is the name of the enzyme that converts pyruvic acid into lactic acid?

Lactate Dehydrogenase (LDH)

28

What is the energy yield of the glycolytic system?

1:2

29

Where does the glycolytic system take place?

Muscle sarcoplasm

30

When does the glycolytic system begin to be dominant?

At around 10 seconds of intense exercise