PNB 2250 Exam 2 With Questions And Answers Graded A+
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Module
PNB 2250
Institution
PNB 2250
How is filter feeding an example of ecosystem engineering? - helps clarify oceans
Oysters in Chesapeake Bay filter the water
Disadvantages to Feeding - must have larger mouth and machinery to breakdown food particles
requires time so pathway is longer
Where is the fuel from food acquired? - che...
PNB 2250 Exam 2
How is filter feeding an example of ecosystem engineering? - helps clarify oceans
Oysters in Chesapeake Bay filter the water
Disadvantages to Feeding - must have larger mouth and machinery to breakdown food particles
requires time so pathway is longer
Where is the fuel from food acquired? - chemical bonds
energy was used to make bonds, and will be released when it is broken
Homeostasis - maintenance of internal environment
Basal Metabolic Rate (BMR) - amount of energy expended when at rest in a neutral environment,
with an inactive digestive system
What role does homeostasis play in regards to food processing? - requires constant energy input
to work
helps expel waste products that are no longer needed or harmful to body
The Goku of energy sources - The Sun
Primary Energy sources - plants and animals
-must be able to detect food (sight/smell)
-bring food into space where bond energy can be recovered
-treat food in a manner in which waste products can also be expelled - Animal Requirements for
food
, (Three)
1) Feeding - bring food into body
2) Digestion - convert molecules into building blocks
3) Nutrition = absorb needed organic molecules and ions
4) Waste Loss - expel nitrogen, acid, bacteria, etc. - Food Processing Steps (4)
breakdown of complex molecules in living organisms to form simpler ones, together with the release of
energy
"destructive metabolism" - Catabolism
Animals must provide ____ (4) for food processing - .path for intake
chemical & mechanical digestion
reabsorption of nutrients
loss of waste products
Energy cannot be created or destroyed, only changes form - 2nd Law of Thermodynamics
size, shape, complexity (bond number) - What food properties can affect feeding habits?
Ability to carry out Oxidative Phosphorylation - Most efficient extraction of energy from
photosynthesis
water with food is strained over gills or other structures to remove food - Filter Feeding
Why are we losing molars? - we aren't needing to crush tougher foods anymore
Advantages to Feeding - feeding is less frequent
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