What is the definition of a "motor unit"?
A. All of the motor neurons supplying a single muscle
B. A pair of antagonistic muscles
C. A single motor neuron plus all the muscle fibers it innervates
D. A single muscle fiber plus all of the motor neurons that innervate it
E. All of the muscles that affect the movement of any given joint
Answer: C
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________ are multinucleated cells that destroy bone
Fill in the blank(s) with the appropriate word(s).
Which of the following is the best explanation of the benefit in the digestive system having the largest collection of lymphoid tissue (MALT) at the distal end of the small intestine?
A) The alkaline secretion of the small intestine aid in the growth of bacteria and must be controlled. B) The body will actively excrete pathogens out the body, into the digestive system to be removed from the body in feces. C) The huge numbers of bacteria living in the large intestine must be prevented from entering the lumen of the small intestine and being absorbed with food's nutrients into the blood stream. D) The digestive systems first and foremost job is to digest and absorb nutrients so it puts off immunity for last.
The lingual salivary glands are
A. multicellular exocrine glands. B. unicellular endocrine glands. C. unicellular exocrine glands. D. multicellular endocrine glands.
White blood cells engulf bacteria by means of ________.
A. active transport B. pinocytosis C. facilitated diffusion D. exocytosis E. phagocytosis