Mussel Anatomy Quiz

What is the mantle of a mussel?

• A muscular foot used for movement

• A fold of skin that encloses most of the body parts of most mollusks

• The exoskeleton of the mussel

• The innermost layer of the shell

Which part of the mussel's anatomy is responsible for secreting the shell?

• The foot

• The gills

• The mantle

• The umbo

What is the umbo in mussels?

• The region where the valves are joined together

• The muscular foot used for movement

• The part of the shell that secretes pearls

• The area where the mouth and foot are located

What is the function of the nephridia in freshwater mussels?

• To secrete the shell

• To maintain proper water balance in the body tissue

• To enclose most of the body parts

• To serve as the exoskeleton

How are pearls formed inside mussels?

• When the mantle secretes many layers of calcium carbonate to seal off the irritant

• When the umbo secretes a special substance

• When the gills filter out foreign bodies

• When the foot encloses foreign particles

What is the primary function of the gills in mussels?

• To help in movement

• To secrete the shell

• To regulate the flow of water through the mantle cavity

• To join the valves together

How does a mussel feed?

• By opening its valves wide and allowing water to flow through

• By positioning itself anterior end downward and slightly opening its valves to expose the siphons

• By using its gills to capture food particles from the sediment

• By extending a foot out of its shell to grab food particles

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What is the role of cilia in the feeding process of mussels?

• To propel the mucus ventrally to the edge of the gills

• To deposit eggs in the suprabranchial chambers

• To attach glochidia to the gills of a fish

• To close the valves of the mussel

Where do female mussels deposit their eggs?

• In the water column

• In the suprabranchial chambers of her gills

• Directly onto the riverbed

• Inside the mantle cavity

What is the name of the larval stage of mussels?

• Spat

• Glochidia

• Veliger

• Nauplius