T cells

a. bind with free extracellular antigen
b. bind with MHC molecules only when they are in association with a foreign antigen
c. are responsible for cell-mediated immunity
d. have characteristics a and c
e. have characteristics b and c


E

Anatomy & Physiology

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In glycolysis,

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Why is sodium actively reabsorbed in the nephron?

A) to make urine less concentrated B) to increase passive reabsorption of water C) to decrease blood pressure D) to decrease osmolarity inside the nephron

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Most joints of the upper and lower limbs are ____

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Anatomy & Physiology