Inappropriate or excessive immune responses to antigens are
A) immunodeficiency diseases.
B) autoimmune diseases.
C) allergies.
D) the result of stress.
E) signs of a weak immune system.
C
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The most abundant cation in intracellular fluid is sodium
Indicate whether the statement is true or false
A(n) ____________________ organ is a muscle or gland carrying out a response
Fill in the blank(s) with correct word
Excretion
a. is the removal of substances that were filtered at the glomerulus or secreted but not reabsorbed. b. is the process by which a substance moves from the peritubular capillary blood to the tubular fluid. c. conserves substances that are important to the body. d. occurs by active transport of substances into the urinary bladder. e. is controlled by sympathetic activity.
How does the skin protect a person from the ultraviolet rays of the sun?
Produces sweat Produces vitamin D Produces sebum Produces melanin