The Ability of Sperm Cells to Move Along the Ductus

question 60

Multiple Choice

The ability of sperm cells to move along the ductus deferens is due to .

• A) gravity
• B) hormonal action
• C) peristaltic contractions
• D) enzymatic activity

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Definitions:

Dermal Gills

Respiratory structures in some aquatic animals that allow for gas exchange directly through the skin.

Book Lungs

Respiratory organs in certain arachnids, such as spiders and scorpions, consisting of stacked plates for gas exchange.

Operculum

In bony fishes, a protective flap of the body wall that covers the gills.

Swim Bladders

Gas-filled sacs in fish that help maintain buoyancy in the water column.