A health care proxy asserts an individual's right to accept or refuse treatment and gives direction to relatives, friends, and medical professionals

The OSHA standards mandate that each at-risk employee must be offered the hepatitis B (HBV) vaccine series within the first 30 days of employment and at the expense of the employer.

Answer the following statement true (T) or false (F)

The total of substances that make up a mass is called a(n) ____________________.

Fill in the blank(s) with the appropriate word(s).