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Apex 1 - 2 Respiratory II: Physiology (24) > Cellular Energetics > Flashcards

Flashcards in Cellular Energetics Deck (50)
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1

What's the energy currency in the body?

ATP

(Adenosine triphosphate)

2

ATP is produced by oxidation of which macro-molecules?

Proteins, Carbohydrates, and Fats

(ADP + Pi --> ATP).

3

What consumes ATP?

Reactions necessary for life

(ATP --> ADP + Pi)

4

Which chemical bond is a high energy bond?

Phosphate bond

5

Why must the supply of ATP be continuously replenished?

ATP can't be stored

6

What's the primary substrate used for ATP synthesis?

Glucose

7

Which produces more ATP?

A. Aerobic metabolism

B. Anaerobic metabolism

 

Aerobic metabolism

8

There are 3 key processes involved in aerobic glucose metabolism:

Glycolysis

Krebs cycle

Electron transport

9

The primary goal of glycolysis is to convert 1 molecule of -------- into two molecules of --------------

1 glucose

to

2 pyruvic acid 

10

The primary goal of glycolysis is to convert 1 glucose to 2 pyruvic acid molecules. The fate of pyruvic acid depends on whether or not ----------  is available.

Oxygen

11

In the absence of oxygen, pyruvic acid is converted to ---------- in the cytoplasm

Lactate

12

If oxygen is available, pyruvic acid is transported into

Mitochondria

13

Net Gain ATP gain of Glycolysis

2 ATP

14

Next, 2 molecules of pyruvic acid are converted into 2 molecules of

Acetyl Coenzyme A

15

Which compound is produced in the Rapoport-Luebbering shunt about halfway through glycolysis?

2,3 DPG

16

The more glucose molecules that go through glycolysis

A. the more 2,3 DPG is produced

B. the fewer 2,3 DPG is produced

the more 2,3 DPG is produced

17

Where does the Krebs cycle take place? 

Matrix of the mitochondria

18

Kreb's cycle begins with the reaction of which two molecules?

Acetyl coenzyme A

and

Oxaloacetic acid

19

Kreb's cycle begins with the reaction of oxaloacetic acid and Acetyl coenzyme A react to produce

Citric acid

20

Kreb's cycle ends with the production of which two molecules?

Oxaloacetic acid

and

NADH

21

True or False

Oxaloacetic acid produced at the end of one Kreb's cycle is reused at the beginning of the next cycle

True

22

The primary goal of the Krebs Cycle (Citric Acid Cycle) is to produce a large quantity of 

H+  ions

 

23

The large quantity of  H+  ions produced during the Krebs Cycle (Citric Acid Cycle) is in the form of:

 

NADH

24

The primary goal of the Krebs Cycle (Citric Acid Cycle) is to produce a large quantity of  H+  ions in the form of NADH. These are used in which process?

Electron transport

25

True or False

Only the products of Carbohydrate metabolism can also enter the Krebs cycle

False

Products of protein and lipid metabolism can also enter the Krebs cycle

26

Krebs Cycle (Citric Acid Cycle) net ATP gain is:

2 ATP

27

The primary goals of glycolysis and Krebs cycle is to

A. liberate hydrogen from glucose

B. liberate carbon from glucose

liberate hydrogen from glucose

28

Before Oxidative Phosphorylation, what's the net gain of molecules of ATP for 1 molecule of glucose?

4 molecules of ATP

29

During Oxidative Phosphorylation NADH is split into which three entities?

NAD+, H+, and 2 electrons

30

During Oxidative Phosphorylation NADH is split into NAD+, H+, and 2 electrons. The electrons are fed into which mechanism?

Chemiosmotic mechanism