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5.1.1 Communication and homeostasis - Coggle Diagram
5.1.1 Communication and homeostasis
the need for communication systems in
multicellular organisms
what are the principles of a good communication system?
what are the two major communication systems?
the communication between cells by cell
signalling
examples of signalling between adjacent cells
examples of signalling between distant cells
how does cell signalling work?
the principles of homeostasis
negative feedback
definition
draw out a negative feedback loop
examples
positive feedback
definition
draw out a positive feedback loop
examples
the physiological and behavioural responses involved in temperature control in ectotherms and endotherms
endotherms
what is an endotherm?
how are temperature changes detected?
surface temperature
blood temperature
behavioural
responses
physiological
responses
explain
each of the following for
cooling down
vasodilation
increased sweating
reducing the insulating effect of hair or feathers
explain
each of the following for
warming up
vasoconstriction
decreased sweating
raising the body hair or feathers
shivering
eg the
polar bear
-how is it a highly adapted endotherm?
controlling thermoregulation in endotherms
how does the
heat loss centre
work?
how does the
heat gain centre
work?
ectotherms
what is an ectotherm?
behavioural responses for temperature control
physiological responses to warming
eg the
Namaqua chameleon
-how is it a highly adapted ectotherm?
what are the
five physical processes
that will heat up or cool an organism?
what is homeostasis?
why is homeostasis needed?
how are receptors and effectors used in homeostasis?