Only About 2

question 42

Multiple Choice

Only about 2.5% of all the water on our planet is freshwater, however,________________ .

• A) over half of this is in wetlands near coastlines and is becoming contaminated with saltwater
• B) over half of this is extremely hard water and is nearly unusable for drinking or agriculture
• C) most of this is in polar ice caps, glaciers, and underground aquifers and is not easily accessed for human use
• D) most of this is in underground aquifers
• E) most of this is in large, freshwater lakes

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Definitions:

Tetanus

A serious bacterial infection characterized by muscle stiffness and spasms, caused by the toxin produced by Clostridium tetani.

Muscle Fiber

A single muscle cell, typically elongated and capable of contracting to produce movement or maintain posture.

Complete Tetanus

A state of sustained muscle contraction caused by rapid, repeated stimulation surpassing the relaxation phase between stimuli.

Muscle Fiber

An individual contractile cell within skeletal muscle, characterized by its long, cylindrical shape and multinucleated structure.