Biol120 - Module 1

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5 Terms

1
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Name the 2 main types of hypotheses to physiology

Proximate and Ultimate

2
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What are Proximate hypotheses and names the 2 specific types

The How

  • Immediate Causation: The Physiological mechanism underlying the trait of interest

  • Development: The role of developmental timeline, experience in expression of trait of interest

3
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What are Ultimate hypotheses and names the 2 specific types

The Why

  • Adaptive Formation: The role of any structural, physiological, or behavioral process that increase an individual’s likelihood of surviving + reproducing compared with other conspecifics

  • Evolution: role of phylogeny, evolutionary history

4
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What is the most common type of feedback mechanisms and define it

Negative feedback (Regulation)

“Maintenance of relatively stable internal condition”

Organisms often attempt to compensate for external pressures in order to maintain homeostasis

5
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What is the more rare type of feedback mechanisms and define it

Positive Feedback

  • Response amplifies starting signal

  • Usually engaged when a process needs to be pushed to completion

  • Can’t go on forever - must be stopped (something must break the “loop”)