Midterm Homeostasis Lec2

Question 1

the normal range for a given system

Answer 1

The set point of homeostasis (monitored by control centre)

Question 2

Circadian Rhythm

Answer 2

are endogenous autonomous oscillators of physiological activities

Question 3

Two classes of homeostatic controls

Answer 3

Intrinsic- act on the organ that makes them

Extrinsic- regulatory mechanism outside an organ, and accomplished by nervous and endocrine systems

Question 4

Negative feedback loop components

Answer 4

• Stimulus
• sensor (monitors magnitude of a controlled variable
• Control Centre (compares sensor’s input with a set point)
• effector (makes response to get back to set point)

Question 5

Positive feedback loop components

Answer 5

Amplifies initial change
"Snowball" 
-Initial stimulus 
-Response
-Stim Increase 
->outside factor required to shut it off

Question 6

Feedforward and Anticipation

Answer 6

Anticipated change to a regulated factor
(EX, salivating before eating, to prep. for carb breakdown).
(EX, breath rate increase before exercise).
-primes body through CENTRAL COMMAND

Question 7

Systems regulated by homeostasis

Answer 7

Integumentary, Respiratory, Circulatory, Digestive, Nervous,

endocrine, musculoskeletal, reproductive, urinary