Which of the following descriptions of a blood sample is most accurate?
A. The ratio of red blood cells to white blood cells would be about 1:1.
B. Platelets are usually present in higher numbers than red blood cells, but lower numbers than white blood cells.
C. Most of the cells that can be identified are red blood cells, with much fewer white blood cells.
D. White blood cells, usually much smaller than red blood cells, are represented in much lower numbers than platelets.
Answer: C
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Which of the following statements is true?
A) Fructose moves across the apical membrane by active transport. B) Glucose and galactose use different transporters in absorption. C) A basolateral GLUT5 transporter moves glucose out of the intestinal epithelial cell. D) Glucose and galactose absorption uses an apical Na+-glucose SGLT symporter. E) None of the statements are true.
The most abundant cation within cells is
A. sodium. B. potassium. C. calcium. D. chloride. E. magnesium.
Which of the elements of a reflex arc is responsible for delivering motor impulses from the central nervous system to effector organs?
A) motor neuron B) sensory neuron C) integration center D) sensory receptor
The regions of myelinated axon membrane that have the highest permeability to ions are the
A. pia mater. B. glial cells. C. ganglia. D. synaptic membranes. E. nodes of Ranvier.