BIO370 - Shark Dissection Quiz

Which fin is located at the top front of a shark?

• Pelvic fin

• Pectoral fin

• Caudal fin

• Anterior dorsal fin

Answer explanation

The fin located at the top front of a shark is the anterior dorsal fin. It helps with stability and maneuverability, distinguishing it from other fins like the pelvic, pectoral, and caudal fins.

What is the function of the spiracle in sharks?

• To assist in breathing

• To help in digestion

• To aid in buoyancy

• To sense vibrations

Answer explanation

The spiracle in sharks functions primarily to assist in breathing. It allows water to flow over the gills even when the shark's mouth is closed, ensuring they can respire efficiently.

Which structure is NOT part of the shark's digestive system?

• Stomach

• Liver

• Spiracle

• Colon

Answer explanation

The spiracle is not part of the shark's digestive system; it is an opening used for breathing. The stomach, liver, and colon are all integral components of the digestive process in sharks.

What is the role of the lateral line in sharks?

• To detect light

• To detect water movements

• To aid in reproduction

• To sense electrical fields

Answer explanation

The lateral line in sharks is a sensory system that detects water movements, helping them sense vibrations and changes in their environment, which is crucial for hunting and navigation.

Which part of the shark is used for reproduction in males?

• Clasper

• Spiracle

• Pectoral fin

• Nares

Answer explanation

The claspers are specialized structures found in male sharks used for reproduction. They help transfer sperm to the female during mating, making them essential for the reproductive process.

Where are the external gill slits located on a shark?

• On the lateral side

• On the caudal side

• On the dorsal side

• On the ventral side

Answer explanation

The external gill slits of a shark are located on the lateral side, allowing for efficient water flow and gas exchange as the shark swims.

Which organ is responsible for detoxification in sharks?

• Kidney

• Liver

• Spleen

• Pancreas

Answer explanation

The liver is the primary organ responsible for detoxification in sharks, processing toxins and waste products from the bloodstream, making it essential for maintaining their health.

What is the function of the rectal gland in sharks?

• To filter blood

• To excrete salt

• To produce bile

• To store fat

Answer explanation

The rectal gland in sharks functions primarily to excrete excess salt from their bodies, helping them maintain osmotic balance in their marine environment. This makes 'to excrete salt' the correct answer.

Which part of the shark's anatomy is involved in buoyancy control?

• Gall Bladder

• Spines

• Pectoral Fin

• Liver

Answer explanation

The liver of a shark contains large amounts of oil, which helps in buoyancy control. This adaptation allows sharks to maintain their position in the water column without expending energy swimming.

What is the primary function of the shark's caudal fin?

• To steer

• To propel

• To stabilize

• To sense

Answer explanation

The primary function of the shark's caudal fin is to propel the shark through the water. Its shape and movement generate thrust, allowing the shark to swim efficiently.