Question

$O_{2}$ dissociation curve is

• A. sigmoid curve
• B. parabolic
• C. hyperbolic
• D. straight line

Answer 1

Answer: (A)

sigmoid curve

Answer 2

When a graph is plotted between percent saturation of haemoglobin and oxygen tension, a cruve is obtained termed as $O_{2}-Hb$ dissociation curve. Oxygen-$Hb$ dissociation curve is sigmoid or $S$-shaped. This is the characteristic for $Hb$.