1) The human body's arterial blood pH is tightly maintainedaround 7.4 by buffering agents that bind hydrogen ions to stop anychange in pH. If an acid-base imbalance overcomes the buffersystem, the body changes the ventilation rate, or the rate at whichgas enters or leaves the lungs. Changing the ventilation ratechanges the concentration of CO2 in the blood, whichalters the pH of the blood. In this case, the muscles that controlthe ventilation rate are acting as the:
homeostatic challenge
sensor
effector
integrator
2) For cells to maintain an appropriate solute concentration,_____ will occur; for cells to maintain an appropriate waterconcentration, _____ will occur.
diffusion, osmosis
osmosis, diffusion
diffusion, facilitated diffusion
diffusion, active transport
3) A marine fish with a cold body temperature that matches itscold surroundings is an example of
negative feedback
regulating
conforming
homeostasis
4) Fiddler crabs are small crabs that inhabit intertidal areas.When the tide comes in, the salinity rises to 35ppt and when thetide leaves, the salinity falls to 5ppt. Fiddler crabs can maintaintheir internal salinity at 32ppt when the external environmentranges from 20-40ppt, but cannot regulate at levels higher or lowerthan this. The range of 20-40ppt is the ____________________ forthese animals.
zone of conforming
zone of stability
osmoregulatory conforming capacity
positive feedback effector range
1) The human body's arterial blood pH is tightly maintainedaround 7.4 by buffering agents that bind hydrogen ions to stop anychange in pH. If an acid-base imbalance overcomes the buffersystem, the body changes the ventilation rate, or the rate at whichgas enters or leaves the lungs. Changing the ventilation ratechanges the concentration of CO2 in the blood, whichalters the pH of the blood. In this case, the muscles that controlthe ventilation rate are acting as the:
homeostatic challenge | ||
sensor | ||
effector | ||
integrator |
2) For cells to maintain an appropriate solute concentration,_____ will occur; for cells to maintain an appropriate waterconcentration, _____ will occur.
diffusion, osmosis | ||
osmosis, diffusion | ||
diffusion, facilitated diffusion | ||
diffusion, active transport |
3) A marine fish with a cold body temperature that matches itscold surroundings is an example of
negative feedback | ||
regulating | ||
conforming | ||
homeostasis |
4) Fiddler crabs are small crabs that inhabit intertidal areas.When the tide comes in, the salinity rises to 35ppt and when thetide leaves, the salinity falls to 5ppt. Fiddler crabs can maintaintheir internal salinity at 32ppt when the external environmentranges from 20-40ppt, but cannot regulate at levels higher or lowerthan this. The range of 20-40ppt is the ____________________ forthese animals.
zone of conforming | ||
zone of stability | ||
osmoregulatory conforming capacity | ||
positive feedback effector range |
