Gas exchange is a function of the
A) cardiovascular system.
B) lymphoid system.
C) respiratory system.
D) urinary system.
E) endocrine system.
C) respiratory system.
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Most of the DNA in the human genome encodes protein.
Answer the following statement true (T) or false (F)
Which of the following is an effect of stress on the immune system?
a) Increased activity of T lymphocytes b) Increased activity of B lymphocytes c) Activation of the immune system d) Inhibition of the immune system e) Increased production of antibodies
Considered one of the leading causes of death in the United States for both men and women, at least two people per ________ in the United States experience coronary artery disease (CAD)-related events, according to the American Heart Association.
a. minute b. hour c. day d. week e. month
Which process is not used to move substances out of a cell?
A. Active transport B. Exocytosis C. Facilitated diffusion D. Phagocytosis E. Simple diffusion