/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 3 The chief energy source of the b... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 3: Problem 3

The chief energy source of the body is: a. sucrose. b. starch. c. glucose. d. fructose.

Short Answer

Expert verified
The chief energy source of the body is glucose (c).

Step by step solution

01

Understand the Question

The question is asking you to identify the primary energy source for the human body from the given options.
02

Consider Each Option

- a. Sucrose is a type of sugar that is broken down into glucose and fructose in the body. - b. Starch is a carbohydrate that is eventually broken down into glucose. - c. Glucose is a simple sugar that cells use directly for energy. - d. Fructose is another simple sugar but is primarily metabolized in the liver.
03

Identify the Chief Energy Source

The body uses glucose as the main form of energy because it can be directly used by cells in processes such as glycolysis to produce ATP, the energy currency of the cell.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Glucose Metabolism
Glucose metabolism is a critical process in the human body. This is how we convert glucose, a type of sugar, into energy that our cells can use. This process primarily occurs through glycolysis and the citric acid cycle.
During glycolysis, one glucose molecule ( C_6H_{12}O_6 ) is broken down into two molecules of pyruvate, producing energy in the form of ATP. The pyruvate then enters the citric acid cycle if oxygen is available.
  • Glycolysis happens in the cytoplasm of cells and is anaerobic, meaning it does not require oxygen.
  • The citric acid cycle, also known as the Krebs cycle, takes place in the mitochondria and does need oxygen.
Understanding glucose metabolism is important because it is the key way that cells get the energy they need to perform their functions.
Carbohydrates Breakdown
Carbohydrates are a major source of energy in our diet. The breakdown of carbohydrates is essential for converting them into glucose. This process begins in the digestive system and involves enzymes that help disassemble complex carbohydrates.
When you consume carbohydrate-rich foods like bread or rice, digestion begins in the mouth with the enzyme amylase. This enzyme breaks down starches into simpler sugars. As digestion continues, these sugars are further broken down in the intestine.
  • Amylase initiates the breakdown of carbohydrates into maltose in the mouth.
  • Further digestion by other enzymes such as maltase turns it into simple glucose molecules.
Once carbohydrates are fully broken down into glucose, they are absorbed into the bloodstream and become available for metabolism and energy production.
ATP Production
ATP, or Adenosine Triphosphate, is the primary energy carrier in cells. It is often referred to as the "energy currency" of the cell because it stores and provides energy for many cellular processes.
The production of ATP occurs mainly through cellular respiration, a three-step process starting with glycolysis, followed by the citric acid cycle, and ending with the electron transport chain.
  • Each glucose molecule can yield up to 38 ATP molecules through complete cellular respiration.
  • Glycolysis yields 2 net ATP molecules, while the citric acid cycle and electron transport chain contribute more.
ATP is used for various cellular functions, from muscle contraction to active transport across cell membranes, making it crucial for maintaining life.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A diet high in carbohydrate-rich foods such as whole grains, vegetables, fruits, and legumes is: a. most likely low in fat. b. most likely low in fiber. c. most likely poor in vitamins and minerals. d. most likely disease promoting.

The primary form of stored glucose in animals is: a. glycogen. b. cellulose. c. starch. d. lactose.

The DRI fiber recommendation is: a. 10 grams per 1000 kcalories. b. 15 to 25 grams per day. c. 14 grams per 1000 kcalories. d. 40 to 55 grams per day.

A fiber-rich diet may help to prevent or control: a. diabetes. b. heart \(\underline{\text { disease. }}\) c. constipation. d. all of the above.

The polysaccharide that helps form the cell walls of plants is: a. cellulose. b. starch. c. glycogen. d. lactose.
See all solutions

Recommended explanations on Biology Textbooks

Biology Experiments

Read Explanation

Responding to Change

Read Explanation

Control of Gene Expression

Read Explanation

Reproduction

Read Explanation

Biological Processes

Read Explanation

Biological Molecules

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.