BIOLOGY-TEXT
BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 47, Problem 1TY
Summary Introduction

Introduction: Absorption can be defined as a process of uptake of nutrients into the circulatory system of the body. The process of absorption occurs after the digestion of food.

Expert Solution & Answer
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Answer to Problem 1TY

Correct answer: An animal absorb nutrients from recently ingested meal during the absorptive state. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

The absorptive stage includes the ingestion of various nutrients into the blood from the alimentary canal. During this state, ingested minerals and nutrients play an important role in the supply of energy to the body.

Option c. is given as “absorbing nutrients from a recently ingested meal”.

Recently ingested meal supplies energy during the absorbing state of an animal. Hence, the correct answer is option c.

Reasons for incorrect answer:

Option a. is given as, “fasting”.

Fasting can be defined as a state of abstaining from having food items. During this state, nutrient is not absorbed at all. Hence, option a. is incorrect.

Option b. is given as, “relying entirely on stored molecules for energy”.

Animals rely on stored molecules for energy in fasting state instead of the absorptive state. Hence, option b. is incorrect.

Option d. is given as, “metabolizing lipids stored in adipose tissue to supply adenosine triphosphate (ATP) to its cells”.

The process of metabolizing stored lipids in adipose tissues for supplying ATP occurs during fasting state and not during the absorptive state. Hence, option d. is incorrect.

Option e. is given as, “doing both a and b”.

During absorptive state, an animal obtained energy from the ingested meal and not during fasting state. The process of metabolizing stored lipids in adipose tissues for supplying ATP occurs during fasting state. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

With the absorption nutrients from the recently ingested food during the absorptive state, an organism is able to meet the energy requirements.

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Gluconeogenesisa. occurs when the liver synthesizes glucose from noncarbohydrateprecursors.b. is the process by which glycogen is broken down to glucose.c. occurs primarily when an animal is in the absorptive state.d. occurs when triglycerides are being formed and stored in adiposecells.e. occurs primarily in skeletal muscle.
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