Which event in inflammation aids in white blood cells migrating from the blood vessel to the site?
a. Arterioles widen.
b. Blood flow produces heat in the area.
c. Capillary permeability is increased.
d. Complement is activated.
e. Phagocytes engulf complement coated bacteria.
c
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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
Ectomycorrhizae hyphae pass through the walls of the cells in the root cortex
a. True b. False
When constructing a YAC, why must a large DNA insert be included?
A) The inserted DNA base pairs with DNA in the genome. B) YACs that are too small do not segregate properly during mitosis. C) The inserted DNA functions as telomeres. D) The inserted DNA contains origins of replication needed for maintenance of the YAC. E) The inserted DNA allows YACs to be used in both eukaryotic and prokaryotic cells.
Explain how a hormone will trigger the signal transduction pathway in a plant.
What will be an ideal response?