Lab exam: Homeostasis

Question 1

typical negative feedback loop

Answer 1

consists of

• stimulus: (change from set point)
• sensor:( detector, receptor where the variable is )
• integration center ( brain or decision maker )
• afferent pathways
• effectors (muscle or glands that carry out the stimulus

pathway.

begins with a change variable (stimulus that is sensed by a receptor, then transferred to the integrating center then transferred thru the afferent pathways. to the effectors through efferent pathways. effector makes the correction and returns to set point.

Question 2

how does negative feedback act to maintain homeostasis

Answer 2

counteracts the stimulus to return the value to its set point
and is maintained by negative feedback loops( is typically designed to correct the regulated variable and return it to set point.

Question 3

setpoint

Answer 3

is determined by taking the average values over time and changing its conditions= causing reset in the set point.

Question 4

why is homeostasis considered a dynamic state

Answer 4

because variables are changing to return to the set point

Question 5

positive feedback loop

Answer 5

which the response goes in the same direction as the original change ( same outcome as the stimulus)
- and they must have a shut off to interpret the cycle or death will occur.

Question 6

feed forward

Answer 6

designed to anticipate a change and begins corrective response before the variable makes away from the set point

• pro active
  advantage: keeps the variable closer to the set point.