Blood sugar is regulated by two pancreatic hormones—insulin and glucagon. When blood sugar rises, insulin is released; it binds to receptors and, through signal transduction, results in an increase in glucose uptake by cells
Blood sugar is regulated by two pancreatic hormonesâ€"insulin and glucagon. When blood sugar rises, insulin is released; it binds to receptors and, through signal transduction, results in an increase in glucose uptake by cells, which effectively lowers blood glucose levels. When blood sugar decreases, glucagon is released, binds to cell receptors, and causes glucose to be released into circulation, thereby increasing blood glucose levels. Diabetes mellitus is a disorder that results from excessively high levels of blood glucose. Type II diabetics have normal to elevated levels of insulin. What, then, might be causing their elevated blood glucose levels?
A) inadequate insulin production
B) defective receptors
C) defective second messenger
D) overproduction of glucagon
Answer: B
You might also like to view...
Which of the following are NOT found in the "gray matter" of the human brain?
A. neuronal soma B. dendrites C. unmyelinated axons D. myelinated axons E. neuronal soma and dendrites
Source of cells that differentiate into primary vascular tissues.
Choose the letter of the best match: A. protoderm B. vascular cambium C. apical meristem D. procambium E. ground meristem
Glands are derived from _____ tissue
a. epithelial c. muscle b. connective d. nervous
Which of the following is NOT a nonvascular
plant?
a. moss b. hornwort c. liverwort d. fern e. all of these ARE nonvascular plants