The Most Fragile of the Biomes Is the

question 37

Multiple Choice

The most fragile of the biomes is the

• A) tundra.
• B) taiga.
• C) temperate deciduous forest.
• D) grassland.
• E) mountain forest.

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Definitions:

Macrophage

A large phagocytic cell capable of ingesting and digesting bacteria and cell debris. Macrophages are also antigen-presenting cells.

Acetylcholine

Acetylcholine is a neurotransmitter involved in many functions including muscle activation, heart rate regulation, and the modulation of brain function.

Graded Potential

A shift in electrical charge across a neuron's membrane, varying in magnitude, that can initiate an action potential if it reaches a threshold.

Action Potential

A rapid, temporary change in a membrane potential across a cell's membrane, leading to the transmission of nerve impulses.