Which of the Following Compounds Allows the Animal That Makes

question 41

Multiple Choice

Which of the following compounds allows the animal that makes it to remove a toxic waste product with the least associated amount of water loss?

• A) ammonia in freshwater fish
• B) ammonia in saltwater fish
• C) urea in humans
• D) uric acid in birds

---

Definitions:

Filium Terminale

The filum terminale is a slender filament of connective tissue that extends from the tip of the spinal cord to the coccyx, anchoring the spinal cord in place.

Conus Medullaris

The tapered, lower end of the spinal cord, located around the first lumbar vertebra, marking the transition from the spinal cord to the cauda equina.

Cervical Enlargement

A widening in the upper part of the spinal cord that supplies nerves to the shoulders, arms, and hands.

Interneuron

A type of neuron that communicates between sensory neurons and motor neurons, playing critical roles in reflexes and neuronal circuits.