Living Systems Are

question 3

Multiple Choice

Living systems are:

• A) closed systems exchanging only energy with the surroundings.
• B) isolated systems that are totally contained.
• C) open systems exchanging only energy with the surroundings.
• D) open systems exchanging both energy and matter with their surroundings.
• E) none of the above.

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Definitions:

Normal Blood pH

The typical pH range of human blood, which is tightly regulated to stay between 7.35 and 7.45.

Blood pH

The measure of acidity or alkalinity of the blood, normally maintained within a tightly regulated range of about 7.35 to 7.45.

pH Range

A scale that measures how acidic or basic a substance is, ranging from 0 (most acidic) to 14 (most basic).

Acidosis

Acidosis is a condition in which there is too much acid in the body's fluids, leading to a lower than normal pH level in the blood.