METABOLISM & CELLULAR RESPIRATION

Question 1

• WHAT IS THE DIFINITION OF METABOLISM ?

Answer 1

• • its the total of all chemical reactions that occur in the cell , in order to maintain life .

Question 2

• witch is the exact reactions that can be in the cellular metabolism ?

Answer 2

• there is two types of metabolic reactions :
• the first is anabolic / endergonic / endothermic reaction .
• the second is catabolic / exergonic / exothermic reaction .

Question 3

• what is the anabolic / endergonic / endothermic reaction ?

Answer 3

• its an reaction that absorb energy .

- assemble into large molecules .

Question 4

what is the catabolic / exergonic / exothermic reaction ?

Answer 4

• its an reaction that release energy .

- broken down into small molecules .

Question 5

• does this metabolic reactions do a specific work ?

Answer 5

• yes , there is four main kinds of work ! :
• the first kind is a “mechanical” work ,
• the second is the “transport” work ,
• the last one is the “chemical” work .

Question 6

• kinds of mechanical work ?

Answer 6

• movement of organelles ,

- movement of the cell generally .

Question 7

• kinds of transport work ?

Answer 7

• pumping molecules across membrane .

Question 8

• kinds of chemical work ?

Answer 8

• pushing the endergonic reaction to completion .

Question 9

• what is the most available / intermediate source of energy for cellular work ?

Answer 9

• it is the adenosine triphosphate ( ATP ) .

Question 10

• what´s break the ATP down , and why ?

Answer 10

• the ATP bonds can be broken by “ hydrolysis “ ( H2O )
• to release ENERGY
• ATP + H2O —- ADP + Pi ( INORGANIC PHOPHATE ) + ENERGY .

Question 11

• cellular respiration ?

Answer 11

• its when the cell release C2O and absorb O2 .

Question 12

• stage one of cellular respiration ?

Answer 12

• begins with glycolysis that takes place in cytosol ,
• yields a small amount of ATP ,
• does not require oxygen .

Question 13

• stage two of cellular respiration ?

Answer 13

• this respiration takes place in the mitochondria ,

- far effective then the glycolysis , at recovering the energy from food .

Question 14

• forms of cellular respiration ?

Answer 14

• there is to forms of cellular respiration :
• anaerobic ,
• aerobic .

Question 15

• anaerobic ?

Answer 15

• occur in the cytoplasm ,
• does not need oxygen ,
• produces less energy “ two ATP “ + “ lactic acid .

Question 16

• aerobic ?

Answer 16

• begins in cytoplasm and ends in mitochondria
• needs oxygen
• produces “ 36 ATP “ , from the metabolic process of the glucose molecule .

Question 17

• what is the ( redox ) ?

Answer 17

• its the oxidative and reduction reactions .

- every cell in the body gain its needs from these reactions .

Question 18

• oxidative reaction ?

Answer 18

• Oxidation is the loss of electrons during a reaction by a molecule .