Which region in the large intestine absorbs fluids and salts that remain after intestinal digestion?

A. Memory T cell: Memory T cells are important for the adaptive immune response and provide cellular immunity but are not responsible for producing antibodies.

B. Memory B Cell: Memory B cells remain in the body after an infection has been cleared and are responsible for producing specific antibodies upon re-exposure to the same pathogen.

C. Natural killer cell: Natural killer cells are part of the innate immune system and function to kill virally infected cells and tumors but do not produce antibodies or have memory capabilities.

D. Mast cell: Mast cells are involved in allergic reactions and defense against parasites but do not produce antibodies and are not part of the memory response.

A. Blood pumped into a ventricle in one minute: This describes venous return but not cardiac output.

B. Blood pumped into the atria in one minute: Cardiac output measures blood leaving the heart, not entering the atria.

C. Blood pumped by each ventricle in one minute: Cardiac output is the amount of blood ejected by each ventricle in one minute. It is calculated by multiplying stroke volume (the amount of blood ejected per beat) by heart rate.

D. Blood pumped out of an atrium in one minute: This describes atrial function but is not related to the definition of cardiac output.