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ECU EHST 2110 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECT
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ECU EHST 2110 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECTECU EHST 2110 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECTECU EHST 2110 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECTECU EHST 2110 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECTFactors Influencing Food Demand - ANSWER - Population Growth- largest factor ...

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  • August 13, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ecu ehst 2110 exam 1 questions and answers 100 co
  • ecu ehst 2110 exam 1 questions and answers
  • factors influencing food demand answer populat

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  • ECU EHST 2110

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ECU EHST 2110 EXAM 1 QUESTIONS
AND ANSWERS 100% CORRECT
Factors Influencing Food Demand - ANSWER - Population Growth- largest factor


-97% of world's population increase is in Asia, Africa and Latin America
Food supply problems in fast growing areas


Factors Influencing Food Demand - ANSWER - Food Chains- transfer of food energy from a
given source through a series of organisms


-Producers- green plants that convert sun's energy into food energy
*Terrestrial plants and conifers
*Aquatic - diatoms, microflagellates, and green algae


-Consumers- animals including herbivores and secondary consumers such as carnivores


-Decomposers- primarily bacteria and fungi, some insects. Recycle detritus back into soil where
it is once again available for use by primary organisms


Micronutrient Deficiencies - ANSWER - *Inadequate intake of essential vitamins and minerals
-Lack of variety in diet- same thing every day
-Not dependent upon calories, but what you eat
*More susceptible to disease
*Stunt mental and physical development
*Loss of energy
* 2 to 3.5+ billion people affected by micronutrient deficiencies


Micronutrient Deficiencies - ANSWER - Vitamin A Deficiency (VAD)- problem in over 100 poor
countries

, *Major cause of childhood blindness
*Seldom occurs when diet includes eggs, dairy products, green leafy vegetables
*S Asia, SE Asia, Africa, Central America, Haiti and NE Brazil, 100-140 million children have
VAD
*Vitamin A stimulates maturation of white blood cells- fight infection and disease
*Deficiency provokes changes in mucous membranes lining respiratory, GI, and UT, making less
effective in protecting body from pathogens


VAD Treatment Strategies - ANSWER - Promoting of breast feeding of infants
Administering large doses of vitamin A in infected kids
Fortifying foods with vitamin A


LAW OF THERMODYNAMICS (1ST) - ANSWER - First law of thermodynamics - energy can
neither be created nor destroyed, but may be changed from one form into another


*Solar energy
*Heat energy
*Kinetic energy
*Potential energy


LAWS OF THERMODYNAMICS (2ND) - ANSWER - Second law of thermodynamics - with
every energy transformation there is a loss of usable energy


*Entropy - all energy is moving toward an ever less available and more dispersed state
*No type of energy transformation is ever 100% efficient


Biomass - ANSWER - dry weight per unit area


*Generally greatest at producer level
*Decreases with trophic level

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