2.4 Flashcards
(9 cards)
Abiotic factors are______
External factors that affect an organisms ability to maintain its metabolic rate
Examples of abiotic factors
Temperature, Salinity, pH
What are conformers
Internal environment is dependent upon the external environment
What are regulators
Maintain their internal environment regardless of the external environment
Conformers behavioural responses
Used to maintain metabolic rate and allow them to tolerate variation in their external environment to maintain their optimum metabolic rate
Conformers have ______
low metabolic cost and have narrow range of ecological niches
Regulators use metabolism to_______
Control their internal environment, which increases the range of ecological niches. The regulation requires energy to achieve homeostasis which increases their metabolic costs
Hypothalamus
Temperature monitoring centre in the brain. Info is communicated by electrical impulses through the nerves to the effectors
Corrective responses (decrease of body temp)
•Shivering - muscle contraction
• Vasoconstriction- decreased blood flow
• Hair erector muscles
• increased metabolic rate
