Osteoblasts are ______, whereas osteocytes are ______.
A) bone-dissolving cells; mature bone cells
B) bone-forming cells; mature bone cells
C) mature bone cells; bone-forming cells
D) bone-forming cells; bone-dissolving cells
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Question 2) Corns are
A) keratinized conical masses on toes. B) scaly scalp areas.
C) growths emanating from the nostrils. D) areas of white skin pigmentation.
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Question 3) The blood-brain barrier consists of
A) a sheet of muscle tissue that separates the brain from the skull.
B) aligned blood cells.
C) capillaries joined by desmosomes that are closer together than they are elsewhere.
D) capillaries whose cells are firmly attached by overlapping tight junctions surrounded
by astrocytes.
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Question 4) We know all there is to know about the structure and function of the human body.
Indicate whether the statement is true or false
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Question 5) A bone lengthens
A) due to increased production of bone matrix by osteoclasts.
B) as a result of cell division in the medullary cavity.
C) as compact bone is deposited beneath the periosteum of the diaphysis.
D) as a result of increased activity within the epiphyseal plate.
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Question 6) The function of the nucleus is to
A) direct the activities of the cell. B) form mitochondria.
C) provide cell shape. D) transfer energy.
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Question 7) Table sugar breaking down into glucose and fructose is a(n) _______ reaction.
A) synthesis B) exchange reaction
C) acid-base D) hydrolysis
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Question 8) The epidermis is about ___ mm thick and the dermis is about ___ mm thick.
A) 1.0 to 2.0; 0.07 to 0.12 B) 0.01 to 0.10; 0.10 to 1.0
C) 3.0 to 4.0; 5.0 to 6.0 D) 0.07 to 0.12; 1.0 to 2.0
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Question 9) How many codons specify the twenty types of amino acids?
A) 3 B) 23 C) 46 D) 61
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Question 10) The basis of using proteomics to describe tissues is that
A) all cells produce the same amounts of the same proteins.
B) different cell types produce different sets of mRNAs.
C) different cell types produce different sets of tRNAs.
D) the genetic code is universal.
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