Question

In man sperms move after ejaculation at a rate of nearly [CBSE PMT 1991]
A) 2 to 4 mm/minute
B) 2 to 4 feet/minute
C) 2 to 4 inches/minute
D) 2 to 4 cm/minute

Answer 1

THE ANSWER IS


In man sperms move after ejaculation at a rate of nearly
A) 2 to 4 mm/minute

Answer 2

Open A) is correct.

   The sperms move after ejaculation at a rate of about 2 to 4 mm per minute (inside female body) while traveling to fertilize an ovum.  This is the speed in a fluid medium.  They may be slowed down to 1 mm/minute in some cases.

   Knowing that the size of sperm cells is about 40 to 50 microns, the speed of 1 mm/minute seems quite fast.