Peptide hormones require ____
a. receptors in the nucleus
b. cholesterol for synthesis
c. synapses for target tissue interaction
d. second messenger systems
e. DNA receptors
ANSWER: d
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When insulin is secreted from the pancreas and acts on muscle cells to increase glucose uptake, this is an example of ____.
A. autocrine signaling B. direct intercellular signaling C. paracrine signaling D. endocrine signaling E. contact-dependent signaling
Cells destined to develop into muscle tissue are transplanted to an area where cells are destined to become epithelial cells. If these cells are under autonomous specification what will happen? The cells will
A. develop into muscle tissue. B. develop into epithelial tissue. C. develop into both muscle and epithelial tissue. D. not develop if transplanted. E. develop into connective tissue.
The oldest megafossils of vascular plants belong to the phylum Rhyniophyta
____________________ Indicate whether the statement is true or false.
During peak usage, what happens to the cost of electricity?
A- It depends on where the power plant is located B- It depends on the time of the year C- It almost always decreases D- Cost of electricity always stays the same E- It almost always increases