Nuclear ________ are open passageways that penetrate fused regions of the double membrane of the nuclear envelope.
Fill in the blank(s) with the appropriate word(s).
pores
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Which type of tissue is made of cells closely packed together with very little intercellular material?
a. epithelial b. muscle c. nervous d. connective
Which mesentery suspends the transverse and sigmoid colons from the posterior body wall?
A) greater omentum B) mesocolon C) mesentery proper D) lesser omentum
After nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stimulate contraction?
A) the tropomyosin blocking the myosin once full contraction is achieved B) acetylcholinesterase destroying the ACh C) calcium ions returning to the terminal cisternae D) the action potential stops going down the overloaded T tubules
It's possible for a steroid hormone and a protein hormone to affect the same intracellular protein because:
A. the steroid hormone may direct the synthesis of the protein. B. the protein hormone may activate the protein. C. the protein hormone may direct the synthesis of the protein. D. of all of the above.