GS102 Final Exam - 2228

Solution Detail
Price: $20.00
  • From: ,
  • Posted on: Sun 18 Mar, 2012
  • Request id: None
  • Purchased: 0 time(s)
  • Average Rating: No rating
Request Description

1. Explain what will happen to jackrabbits living in hot, arid lands when the temperature of the outside air exceeds their internal body temperature.

 

2. Identify the specific evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment.

 

3.  For adult human females, explain the metabolic "costs" of pregnancy and lactation.

 

4. Explain the order in which stored resources are drawn for energy needs from a fasting animal.

 

5. To maintain adequate nutrition, animals require dietary access to certain amino acids. How would you describe an amino acid that is "nonessential"? Provide an example of a nonessential amino acid.

 

6. Describe what would occur if a significant increase in the amount of interstitial fluid began to surround the capillary beds of a human's lungs.

 

7. What would the cardiac output be of a patient with a blood pressure of 120/75, a pulse rate of 40 beats/minute, a stroke volume of 70 mL/beat, and a respiratory rate of 25 breaths/minute?

 

8. Why is the velocity of blood flow lowest in capillaries?

 

9. Explain why dialysis patients who will have blood withdrawn, dialyzed, then replaced, are always weighed when they enter the facility and then weighed carefully again before they leave.

 

10. Identify and explain the type of immunity that is present only when a newborn infant is being fed by actively nursing on its mother and ends when nursing ends.

 

11. What would occur if a transfusion of type A blood was given to a person who has type O blood?

 

12. What would be the first form of treatment for a patient complaining of watery, itchy eyes and sneezing after being given a flower bouquet as a birthday gift?

 

13. In close comparisons, external fertilization often yields more offspring than internal fertilization. However, identify one advantage of internal fertilization over external fertilization.

 

14. Identify and explain the characteristics of a male and female’s "primary" sex characteristics.

 

15. A female cat in heat urinates more often and in many places. Male cats are attracted to the urine deposits. What is a proximate cause of this increased urination?

 

16. A cage containing male mosquitoes has a small earphone placed on top, through which the sound of a female mosquito is played. All the males immediately fly to the earphone and go through all of the steps of copulation. What is the best explanation for this behavior?

 

17. What is the correct sequence (from most to least inclusive) of the levels of ecological

 

18. As you study two closely related predatory insect species, the two-spot and the three-spot avenger beetles, you notice that each species seeks prey at dawn in areas without the other species. However, where their ranges overlap, the two-spot avenger beetle hunts at night and the three-spot hunts in the morning. When you bring them into the laboratory and isolate the two different species, you discover that the offspring of both species are found to be nocturnal. What have you discovered an example of?

 

19. Evidence shows that some grasses benefit from being grazed. What term would best describe this plant-herbivore interaction?

 

20. Monarch butterflies are protected from birds and other predators because of cardiac glycosides they incorporate into their tissues from eating milkweed when they were in their caterpillar stage. The wings of a different species of butterfly, the Viceroy, look nearly identical to the Monarch so predators that have learned not to eat the bad-tasting Monarch avoid Viceroys as well. Explain what term this example best describes.

Solution Description

1. Explain what will happen to jackrabbits living in hot, arid lands when the temperature of the outside air exceeds their internal body temperature.

 -When a jackrabbit lives in hot conditions, arid lands and the temperature of the outside air exeeds their internal body temperature their constricts the blood vessels in their large ears.

 In the case of the jackrabbit, researchers noted that its large, pink-tinged ears turn pale when the air temperature exceeds 40 degrees C (104 F), the normal temperature of the jackrabbit's body. The color change reflects a temporary narrowing of blood vessels in response to a hot environment. With their blood supply reduced, the ears can absorb heat without overheating the rest of the body. When the air cools, blood flow increases, and the large ears again help release excess heat.

2. Identify the specific evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment.
 -The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed through a series of steps into another chemical, by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable reactions that require energy and will not occur by themselves, by coupling them to spontaneous reactions that release energy. As enzymes act as catalysts they allow these reactions to proceed quickly and efficiently. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells.

3.  For adult human females, explain the met