Homeostasis

Question 1

Law of tolerance

Answer 1

-An organisms success is based on the interaction with a complex set of conditions that each organism has a certain minimum and maximum and optimum environmental conditions
- the response determines success of on organism in an environment

Question 2

Advanced lee Biggs law of minimum

Answer 2

A reaction process is limited by the most limiting component or conc in a reaction

Question 3

Aerobic performance

Answer 3

Describes an organisms ability to sustain aerobic activities necessary for survival

Question 4

Scope for aerobic respiration stages

Answer 4

1. Critical temperature - point where the organism shifts from aerobic to anaerobic due to too high or low temp
2. Optimum temperature- can meet oxygen demand efficiently - allows increased met. rates and max activity
3. Pejus point - a decline in performance - asymmetrical effects on bell curve
4. Onset denaturation - temp threshold causing breakdown of bonds and cellular functions

Question 5

Optimum temp on pop size

Answer 5

Optimum temp where pop thrives - highest pop at peak of bell curve

Question 6

Zone of tolerance on pop size

Answer 6

Leads to decrease in pop size eventually point where pop cannot exist - zone of intolerance

Question 7

Biogeography and physical tolerance

Answer 7

Physio responses to environ variables determines the distribution of organisms globally

Question 8

Physiology research impact on ecology

Answer 8

Understanding physio limits plays crucial role in where organisms are found globally

Question 9

Wide tolerance range

Answer 9

Likely to be widely distributed

Question 10

Limits of tolerance - larval stages

Answer 10

Show activity at extremities such as low temps however only find adults at shallower regulated environ - this can trigger ecological evol forming new deep sea species (king crabs)

Question 11

King crabs

Answer 11

Closely related to shallow dwelling crabs however possess citrate synthase gene which code for heat shock proteins prevent death

Question 12

Homeostasis

Answer 12

Tendency towards a relatively stable equilibrium among interdependent elements especially those maintained by physiological processes

Question 13

Homeostasis requirements

Answer 13

Control centre which mediates or acts to create a response to change and to correct imbalance
Receptors - to detect change or imbalance within organisms

Question 14

Vitality

Answer 14

How healthy the organism is body and state

Question 15

Stress response

Answer 15

Induced in response to an increase in stress maintaining and achieving homeostasis
At incr stress cell death may occur if homeostasis processes cannot counteract

Question 16

Stress definition

Answer 16

A measurable alteration of a physiological or behavioural biochem or psychological steady state which is induced by environmental change and which renders the indiv etc more vulnerable to environ change

Question 17

analysing the stress response

Answer 17

If organism increases or decreases response in comparison to its usual response of the change was stat significant - it is a stress response

Question 18

Increase stress - adaptive response

Answer 18

Adaptive response incr to max - when this max out degradation occurs

Question 19

Intrinsic stress

Answer 19

Bio and physio challenges organisms face due to internal processes
Can be exacerbated by external factors
Eg. Disease

Question 20

Extrinsic stress

Answer 20

Stressors due to external environment factors - outside the body
Eg. Predation/ temperature change

Question 21

pejus

Answer 21

point of decline “becoming worse”