Which of the following ions are cotransported across the wall of the proximal convoluted tubule, distal convoluted tubule, and the ascending limb of the loop of Henle?
A. sodium and bicarbonate
B. potassium and phosphate
C. sodium and chloride
D. bicarbonate and potassium
E. potassium and chloride
C
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Answer the following statements true (T) or false (F)
1. The directional movement of cells in response to chemicals is called chemotaxis. 2. Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens. 3. Soluble proteins secreted by plasma cells are called antibodies. 4. A given pathogen will provoke either a cell-mediated response or an antibody-mediated response but not both. 5. Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur.
Membrane proteins are found
a. as distinct layers with one layer facing the extracellular fluid and the other facing the intracellular fluid. b. both embedded in and associated with the lipid bilayer of the plasma membrane. c. associated with the lipid bilayer of the plasma membrane, but not actually embedded in it. d. only in the plasma membrane, and not in other cellular membranes. e. none of these.
All of the following are inferior to the umbilical region EXCEPT the ________
A) urinary bladder B) hypogastric region C) pubic region D) epigastric region
Which part of the tooth is the superior area where food is ground, snipped, and torn?
A) pulp B) crown C) occlusal surface D) cementum