Sperm

Question 1

Three phases

Answer 1

Proliferation
Meiosis
Differentiation

Question 2

Differentiation

Answer 2

• Golgi phase = acrosomc vesicle
  Formation
• cap phase = acroscomic vesicle spreading over the nucleus
• acrosomal phase = nuclear and cytoplasmic elongation
• maturation phase = final assembly that forms a spermatozoon

Question 3

Days for species

Answer 3

• bull = 61
• ram = 47
• boar = 39
• stallion = 55
• rabbit = 48

Question 4

Postcapacitation events

Answer 4

• hyperactive motility
• binding to ZP
• acrosomal reaction
• penetration of ZP
• sperm-oocyte membrane fusion
• sperm engulfed
• decondensation of sperm nucleus
• formation of male pronucleus

Question 5

Acrosomal reaction

Answer 5

• the acrosomal reaction is an orderly fusion of the spermatozoa plasma membrane and the outer acrosomal membrane
• release of acrosomal enzymes allows the spermatozoon to digest its way through the ZP