How much more powerful are modern electron microscopes compared to light microscopes?
a. 100x
b. 50x
c. 25x
d. 10x
e. 5x
a
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The relatively few ________ residing in connective tissues engulf invading pathogens and release chemicals that attract many more cells to assist in the body's defense.
Fill in the blank(s) with the appropriate word(s).
By what means does the endocrine system regulate bodily processes?
a. nerves b. electrolytes c. minerals such as calcium d. carbon dioxide e. hormones
The functions of the epithelia include all of the following EXCEPT ________
A) providing physical protection B) storing energy reserves C) controlling permeability D) absorption
Which is not true of voltage-gated sodium channels?
A) They have both an activation gate and an inactivation gate that work independent of each other. B) They open and close in response to changes in the membrane potential. C) They are found on excitable membranes. D) They have both an activation gate and an inactivation gate that work dependent of each other. E) None of these is false.