Insulin increases glucose transport across the cell membrane of an adipocyte but not across the membrane of a liver cell. How can one hormone have two different effects?
What will be an ideal response?
The two types of cells differ either in the receptors on their cell membranes or in the signal transduction that occurs after binding of insulin.
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Assimilation is
A. breaking down foods into nutrients that the body can absorb. B. an increase in body size without a change in overall shape. C. eliminating waste from the body. D. changing absorbed substances into different chemical forms.
Lymph can:
a. carry cancer cells that can be trapped in lymph nodes b. be a possible route for the spread of cancer c. carry bacteria to lymph nodes d. all of the above
Which enzyme class transfers electrons from one substance to another?
A. Transferase B. Oxidoreductase C. Electin D. Isomerase E. Ligase
In the proximal tubule:
a. the filtrate is hypertonic to plasma b. most filtered nutrients, water and sodium are reabsorbed back into the bloodstream c. the filtrate may become more concentrated than plasma d. secretion is the major activity