HW #41 - AP Biology Period 4 #22 Liem Nguyen 3/10/10...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
AP Biology Period – 4 #22 Liem Nguyen 3/10/10 Homework #41 (090320): Chapter 41 (due Friday 090320) Total points: 40 for Attempt on all questions Concept Map: 10 Points Chapter 41: Animal Nutrition Objectives Nutritional Requirements of Animals 1. Compare the bioenergetics of animals when energy balance is positive and when it is negative. Different metabolic strategies when energy is positive/negative How much food digested/used per unit of time Activity of animal increases metabolic rate Distributed amongst activity (homeostasis, growth) Change in metabolic strategy of animals Animals tend to have different metabolic strategies when energy is positive than when it is negative. The metabolic strategy is how much food is digested and used per unit of time such that there are endothermic strategies and ectothermic strategies. Activity of the animal increases the rate of metabolic function above the BMR or SMR. The use of energy is distributed amongst activity, homeostasis, growth, and reproduction. Going past or below the metabolic rates usually triggers a change in the metabolic strategy of the animal. 2. Name the three nutrition needs that must be met by a nutritionally adequate diet. Essential nutrients included in animal’s diet Essential amino acids obtained prefabricated form Essential fatty acids animals can synthesize Examples: vitamins, minerals There are three nutrition needs that must be met by a nutritionally adequate diet. The first is essential nutrients, which should be included in an animal’s diet. The second is essential amino acids, which are obtained from food in prefabricated form. Third, essential fatty acids should be included so that animals can synthesize the nutrients. Examples of fatty acids include vitamins and minerals. 3. Distinguish among undernourishment, overnourishment, and malnourishment. Undernourishment: deficient in calories, break down of proteins Overnourishment: obesity, excess fat Malnourished: missing nutrient, mineral deficiency
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Undernourishment is when an animal does not have enough calories in its diet. This causes the break down of proteins. But when this is practiced often, it is called anorexia. Overnourishment is also known as obesity, which is a very serious problem in America. This is when excess fat builds up in the body. Malnourishment is when one’s diet it missing certain nutrients, resulting in a mineral deficiency. 4. Explain why fat hoarding may have provided a fitness advantage to our hunter-gatherer ancestors. Feast-or-famine existence Natural selection favored fatty-eaters Rare occasions where abundance was available More likely to survive famines Back then, our ancestors lived a feast-or-famine type of existence, when they weren’t sure whether they would eat every day or not. So, natural selection favored those individuals with a physiology that induced them to gorge on rich, fatty foods on those rare occasions they were abundantly available. This meant they were more likely to survive times of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/06/2011 for the course AP BIO 101 taught by Professor Chan during the Fall '05 term at JFK.

Page1 / 7

HW #41 - AP Biology Period 4 #22 Liem Nguyen 3/10/10...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online