A cell is
A. a structure composed of several tissue types.
B. a group of organs with a common set of functions.
C. a small structure within a molecule.
D. a group of atoms with similar structure and function.
E. the basic structural unit of living organisms.
Answer: E
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The brain and spinal cord are protected by the ________
A) serosa B) meninges C) pleura D) peritoneum E) pericardium
Increasing the number of recruited motor units in a muscle increases its force or strength of contraction
Indicate whether the statement is true or false
The binding of ________ to a nicotinic receptor of a muscle fiber will ________ it.
A. acetylcholine; excite B. acetylcholine; inhibit C. acetylcholinesterase; excite D. monoamine oxidase; inhibit E. norepinephrine; excite
Embryonic stem cells are said to be ________. That is, they have the ability to develop into any type of adult cell.
Fill in the blank(s) with the appropriate word(s).