Metabolism and Energy Flashcards

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1
Q

How does Metabolism correlate with catabolic and anabolic reactions?

A

Catabolic breaks down molecules to release energy, while anabolic reactions build molecules and require energy.

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1
Q

What is Metabolism?

A

all the chemical reactions that occur in the body to maintain life.

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2
Q

Kinetic Energy

A

Energy of motion

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3
Q

Thermal Energy

A

heat energy

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4
Q

Movement

A

Kinetic Energy

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5
Q

Potential Energy

A

stored energy

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6
Q

Bond Energy

A

the amount of energy that will break a bond between two atoms

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7
Q

Electrical

A

the energy of electric charges

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8
Q

How does the energy change in an endothermic reaction?

A

energy is absorbed from the surroundings, causing the surroundings to cool down

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9
Q

How does the energy change in an exothermic reaction?

A

Energy is released to the surroundings, causing the surroundings to heat up

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10
Q

Enthalpy

A

total energy contained in a system or in the molecule’s chemical bonds. A decrease in H increases spontaneity

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11
Q

Transition State

A

the state corresponding to the highest potential energy along this reaction coordinate

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12
Q

Activation Energy

A

The minimum energy required to cause a process (such a chemical reaction) to occur

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13
Q

Free energy

A

a thermodynamic quantity equivalent to the capacity of a system to do work

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14
Q

First Law of Thermodynamics

A

“Energy cannot be created or destroyed, only transferred or converted from one form to another”

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15
Q

Second Law of Thermodynamics

A

“In any energy transfer or conversion, some energy will be lost as unusable heat energy”

16
Q

How does Law of thermodynamics apply to endothermic reactions?

A

-They involve the transfer or conversion of energy between systems
-energy is absorbed by the system from the surroundings, increasing potential energy and a decrease in entropy

17
Q

How does Law of thermodynamics apply to exothermic reactions?

A

-They involve the transfer or conversion of energy between systems
-energy is released from the system into the surroundings, resulting in a decrease in potential energy and a increase on entropy

18
Q

What is Gibbs Free Energy?

A
19
Q

What must Gibbs free energy, enthalpy, entropy and temp be for a reaction to be nonspontaneous?

A
20
Q

What must Gibbs free energy, enthalpy, entropy and temp be for a reaction to be spontaneous?

A
21
Q

Is the formation of ATP endothermic or exothermic?

A

highly exothermic because it requires energy

22
Q

Is the formation of ADP + Pi endothermic or exothermic?

A

exothermic reaction because energy is released during this process

23
Q

Why is the reaction of ATP and ADP + Pi considered coupled?

A

The energy released from the hydrolysis of ATP into ADP is used to perform cellular work, usually by coupling the exergonic reaction of ATP hydrolysis with endergonic reactions.