Which of the following organ systems are the main responsible in regulating other organ systems to maintain homeostasis, the maintenance of a stable internal environment?
a.
muscular and endocrine
b.
digestive and urinary
c.
digestive and respiratory
d.
nervous and endocrine
Which of the following is TRUE about osmoregulation of fishes?
a.
90% of bony fishes are incapable of osmotic regulation in the opposite environment.
b.
Few fishes have evolved osmoregulatory mechanisms to survive in all kinds of aquatic environment like salmon.
c.
Organism like goldfish can tolerate only a relatively narrow range of salinity.
d.
All of the above
Why is fever a “good thing” during bacterial infection?
a.
It conserves iron which reduces nutrient needed by bacteria
b.
It increases enzymatic activity of the protective body cells
c.
It inhibits the activity of invading organisms and could kill them
d.
All of the above
What could happen due to a failure in homeostasis?
a.
The accumulation of waste products
b.
The loss of excess water from the body
c.
Maintaining excess levels of sugar in the body
d.
All of the above are potential outcomes of failure of homeostasis
What happens when a cell is placed in a hypertonic environment?
a.
Tends to shrink due to loss of water
b.
Tends to swell due to water intake
c.
Neither shrinks nor swells
d.
All of them
What problem is faced by organisms that live in freshwater?
a.
Their bodies tend to lose too much water to their environment.
b.
Only saltwater poses problems for animals that live in it.
c.
They have no way of controlling their tonicity.
d.
Their bodies tend to take in too much water.
Which of the following is NOT an example of negative feedback?
a.
Calcium level in the blood
b.
Glucose level in the blood
c.Which type of animal maintains a constant internal body temperature?
a.
Ectotherm
b.
Mesoderm
c.
Coelomate
d.
Endotherm
Blood clotting
d.
All of these
