Which of the Following Competes with a Natural Messenger and Stimulates

question 74

Multiple Choice

Which of the following competes with a natural messenger and stimulates a receptor?

• A) an agonist
• B) an antagonist
• C) both a and b
• D) neither a nor b

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Definitions:

Horsetail

A seedless vascular plant having only one genus (Equisetum) in existence today; characterized by rhizomes, scalelike leaves, strobili, and tough, rigid stems.

Sporophyte

The diploid, spore-producing phase of a plant that alternates with the haploid gametophyte in the life cycle.

Angiosperms

Flowering plants that produce seeds enclosed within a fruit, representing the most diverse group of plants on Earth.

Gymnosperms

are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes, characterized by not having flowers or fruit.