Bilogy M3 Food Storage in Humans

FOOD STORAGE IN LIVING THINGS

Humans

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INTRODUCTION

FOOD STORAGE EXPLAINED

FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY


Module 3 Unit 8 Lesson 2 1


Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Introduction

Look at your upper arms; look at your belly! Do you store food? If yes… what do you store? Where? Does your body develop special organs in which to store food the same way that plants do?

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Objectives

You should be able to:1. identify the form in which food is

stored in the human body.2. describe areas in the human body

where storage is most likely to occur.3. list other substances apart from food

that might be stored in the body.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Excess in your diet!

The excess food that you eat - especially fat - is stored. Excess carbohydrate and even protein can also be converted to fat and stored.

So .. all the excess fat that you have anywhere in or on your body comes from your diet!

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Storage in Mammals

In mammals, food is stored in several ways: • polysaccharides (starchy foods) are

stored as glycogen. • excess sugar, such as glucose, is also

converted to glycogen and stored.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Storage in Mammals – LIVER

Stored glycogen is called ‘animal starch’. It is stored mainly in the liver.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Glycogen is also stored in MUSCLES.

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Humans

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INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Storage in Mammals

• When needed for energy–related activities, glycogen can be re-converted to glucose by the action of hormones.

• NB. You will learn more about this when you do ‘homeostasis’!

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Humans

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INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Fat Storage – UNDER THE SKIN

Most persons store fat under the skin. Lipids are stored as fat usually under the skin in the abdomen or ‘belly’ region, as well as the back, under the neck and chin, the arms and thighs.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Fat Storage

• Fat is also stored around many organs and serves to cushion and protect them.

• Stored fat serves as an insulator and also an energy source.

Look at the fat stores (in yellow) on the diagrams on slide 11.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Locations of stored fat ( shown by yellow)

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Morbid Obesity from Fat Storage

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Humans

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INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Other animals also store fat and become obese!

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

A bear stores fat before it hibernates during winter

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Humans

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INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Did You Know?Obesity is responsible for:• High Blood pressure, hypertension - is twice as

common in adults who are obese than in those who are at a healthy weight.

• High blood cholesterol - 50% more likely to have elevated blood cholesterol levels.

• Diabetes Type 2 - Researchers estimate that 88 to 97% of type 2 diabetes cases diagnosed in overweight people are a direct result of obesity

• Congestive heart failure - obesity increases the risk of congestive heart failure, a potentially fatal condition in which the heart muscle weakens, progressively losing the ability to pump blood.

• Stroke !

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Storage in mammals

The excess protein from your diet can be deaminated and the carbohydrate part converted to glycogen and stored. What is deamination?Where does it occur?Go to the next slide and try the “Fill-in-the blanks” exercise on Deamination.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Read each statement and then write down words that will correctly complete each statement. Point and click on the statement to get feedback.

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1. Deamination is the process by which ______ ____ are broken down when too much ______ has been taken in.

3. Ammonia is toxic to the human system, and _________convert it to ______or _________.

2. It Involves the removal of an amino group from the amino acid and it is then converted to ___________.

4. Deamination takes place primarily in the ____ and also in the __________.

1. Deamination is the process by which amino acids are broken down when too much protein has been taken in.

3. Ammonia is toxic to the human system, and enzymes convert it to urea or uric acid.

2. It Involves the removal of an amino group from the amino acid and it is then converted to ammonia.

4. Deamination takes place primarily in the liver and also in the kidneys.


Humans

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INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Storage of other materials

• Vitamins such as A, D, K , E and C, nicotinic acid and folic acid

• Minerals e.g. iron and potassium.• The liver may also serve as

temporary storage area for various toxins which might be either ingested or produced in the body from physiological activities.

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Humans

X

INTRODUCTION


FOOD STORAGE AREAS

STORAGE OF OTHER

MATERIALS

SUMMARY

Summary

• Plants make and store food for their own use. Animals, such as humans who cannot make their own food, must rely on plants - either directly or indirectly – for their stored food to meet the animal’s metabolic requirements.

• When animals store excess food from their diet, it is usually problematic and harmful to their health and general well-being.

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Education

Bilogy M3 Food Storage in Humans