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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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White muscle fibers produce ATP mainly by ________.

  1. a. aerobic respiration
  2. b. lactate fermentation
  3. c. phosphate transfer from creatine phosphate to ADP

Summary Introduction

Introduction: ATP is required for the contraction of muscles. The muscle fibers can also produce ATP mainly by using the three pathways. The muscle fibers can be classified into mainly two types depending up on their ability to speed up the conversion of ATP to ADP by the myosin. They are slow fibers and fast fibers. The fast fibers include the white muscle fibers. The red fibers can be either slow fibers or fast fibers.

Explanation

Reason for the correct answer:

There are mainly three pathways by which the ATP can be produced by the muscle fibers. The first pathway is the creatine phosphate breakdown. The second pathway is the aerobic respiration and the third pathway is the lactate fermentation.

However, the white muscle fibers help to make the ATP mainly by using the lactate fermentation. The fast fibers include the white muscle fibers. These fibers lack the myoglobin and few mitochondria. This pathway acts as a third source of energy of the white muscles. It involves the conversion of pyruvate to lactate in the resting muscles.

Option b. is given as “lactate fermentation”.

The white muscle fibers can produce ATP by using lactate fermentation pathway which involves the conversion of pyruvate to lactate in the resting muscles.

Hence, option b. is correct.

Reasons for the incorrect answers:

Option a...

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