In Laboratory Animals, Lifespan Has Been Extended By

question 15

Multiple Choice

In laboratory animals, lifespan has been extended by:

• A) Restricting the caloric intake while maintaining the proper levels of vitamins and nutrients
• B) Restricting the caloric intake and reducing the proper levels of vitamins and nutrients
• C) Increasing the caloric intake while maintaining the proper levels of vitamins and nutrients
• D) Increasing the caloric intake and reducing the proper levels of vitamins and nutrients
• E) None of these is correct.

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Definitions:

Gastrovascular Cavity

A gastrovascular cavity is a single internal cavity in certain simple animals that acts both in digestion and the distribution of nutrients.

Pedal Disk

The base of a cnidarian, such as a sea anemone or coral, that attaches to a substrate.

Groups of Muscles

Collections of muscle tissue that work together to perform a specific function in the body.

Arthropods

Arthropods are a large phylum of invertebrate animals characterized by their exoskeleton, segmented body, and jointed appendages, including insects, arachnids, crustaceans, and myriapods.