Which two of the following changes (1-4) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?
1) Increase in red blood cell size
2) Increase in red blood cell production
3) Increase in breathing rate
4) Increase in thrombocytes count
Changes occurring are
(2) and (3)
(3) and (4)
(1) and (4)
(1) and (4)
A.
(2) and (3)
When a person moves to higher altitudes, the PO2 and total atmospheric pressure decrease. Hypoxia stimulates the JG - cells of the kidney to release erythropoietin hormone, which stimulates erythropoiesis in bone marrow causing polycythemia. Hypoxia will also increase breathing rate. Initially, the size of RBCs will also increase but with an increase in number of RBCs, the size of RBCs becomes normal.
The two gases making highest relative contribution to the green house gases are
CO2 and CH4
CH4 and NO2
CFCs and N2O
CFCs and N2O
A renewable exhaustible natural resource is
coal
petroleum
minerals
minerals
dB is a standard abbreviation used for the quantitative expression of
the density of bacteria in a medium
a particular pollutant
the dominant Bacillus in a culture
the dominant Bacillus in a culture
Which one of the following is not used in organic farming?
Glomus
Earthworm
Oscillatoria
Oscillatoria
