1. Quiz # 11

2. Negative Feedback: Thermoregulation
core body temp tb
various blood
temp sensors
in hypothalamus
‘normally’ ts  37c
vasoconstrict (save)
shiver (generate)
etc. (or vice versa)
error signal = ts - tb
comparator
effector
thing being
controlled
sensor
set
point + -
because of -FB,
tb cycles around ts
in & out
from env
at equilibrium, gains = losses
generate + in = out
Quiz # 11:
Use the phenomena of ‘the chills’ & ‘the sweats’ to help explain
the onset, maintenance and termination of fever
as the product of a homeostatic, negative feedback system.