Question

Which ions enter the sperm during capacitation, causing rapid whiplash movements of the tail?

Options

• Potassium ions (K⁺)

• Sodium ions (Na⁺)

• Calcium ions (Ca²⁺)

• Magnesium ions (Mg²⁺)

Answer 1

During capacitation, Ca²⁺ (calcium ions) enter the sperm, causing the tail to begin rapid whiplash movements. This increases sperm speed and motility as the tail changes from gentle to vigorous movement.