Homeostasis is the ability of an organism to maintain a constant steady-state with the external environment. The organism employs various mechanisms to attain a steady-state. The science of control mechanism is called cybernetics. All non-chordates, Pisces, amphibians, and reptiles are unable to maintain constancy in their internal environment so are called ectotherms or cold-blooded organisms whereas birds and mammals can maintain the internal constancy, they are called endotherms or warm-blooded organisms. So, take the Homeostasis quiz and increase your knowledge about homeostasis.
1. Homeostasis is.......
A. Maintenance of stability with in an organism.
B. Maintenance of stability within a social group.
C. Both of these
D. None of these
2. The science of control is......
A. Hypostasis
B. Homeostasis
C. Cybernetics
D. Homostasis
3. The cooperative working of all the internal organs is called......
A. Steady state
B. Homeostasis
C. A state of equilibrium
D. All of the above
4. Sensors and circuits in internal environment are comparable to......
A. Receptors and nerves
B. Effectors and receptors
C. Effectors and nerves
D. Receptors and hormones
5. Most of the control systems of the body act by......
A. Positive feedback
B. Negative feedback
C. Allosteric inhibition
D. None of the above
6. Negative feedback means.......
A. Series of changes that return the factor towards certain mean value.
B. The return of factors to zero.
C. Product of the reaction stop the action of first step in the series.
D. Product control the action of enzyme of the step immediate before that.
7. The volume and composition of body fluid are regulated by.......
A. Control of urine formation
B. Control of fluid intake
C. Both of these
D. None of these
8. The highly successful organisms are.....
A. Pisces and amphibians
B. Amphibians and reptiles
C. Reptiles and birds
D. Birds and mammals
9. Which feedback is very rare in biological systems?
A. Negative feedback
B. Positive feedback
C. Both of these
D. None of these
10. Which one of the following is not the example of negative feedback?
A. Fluid homeostasis
B. Blood thyroxine homeostasis
C. Uterine muscles contraction during labour stimulate oxytocin
D. Blood glucose homeostasis
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