How
many environments animals really have?
a) two
b) three
c) four
d) undefined
Explanation: 1. Eternal environment and
2. Internal environment
The internal environment is formed by the circulating organic liquid called…..
a) lymph
b) plasma
c) blood
d) both a and b
Explanation: lymph or plasma is the fluid of blood which is present around the tissues of the body.
Which of the following surrounds and bathes all the tissue in human body?
a) water
b) blood
c) lymph or plasma
d) CSF
Explanation: Lymph is a fluid similar in composition to blood plasma.
The tendency of an organism or cell to regulate internal condition is called…..
a) homeostasis
b) osmoregulation
c) excretion
d) thermoregulation
Explanation: homeostasis maintain the internal condition at a set point value despite changes in the external environment.
How many components operate the mechanism of homeostasis?
a) two
b) three
c) four
d) six
Explanation: 1. Receptors, 2. Control center or integrator and 3. Effector
Which of the following detects the changes in variable and feeds the information back to the control center?
a) receptor
b) effector
c) control center
d) none of these
Explanation: receptor may be organ, tissue or cell which sense the changes in external environment.
