Of the four major types of membranes, the one consisting of dense connective tissue
overlying loose connective tissue is
A) synovial membrane. B) mucous membrane.
C) serous membrane. D) cutaneous membrane.
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Question 2) Signs of aging at the cellular level are (Select all that apply)
A) impaired cell division and the ability to break down and recycle worn cell parts.
B) unrepaired DNA and abnormal proteins.
C) a fatty liver and clogged blood vessels.
D) graying hair, waning strength, and wrinkles.
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Question 3) What determines the color of skin?
A) The amount of melanin that melanocytes produce.
B) The number of melanocytes in the epidermis.
C) The density of hair.
D) The thickness of the epidermis.
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Question 4) Bases reacting with acids form ________ and water.
A) new elements B) proteins C) salts D) buffers
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Question 5) The cell membrane
A) has all of the above characteristics.
B) provides a barrier to water-soluble substances.
C) maintains the integrity of the cell.
D) controls the entry and exit of various substances.
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Question 6) Energy is defined as
A) the ability to do work.
B) the heat given off from chemical reactions.
C) the heat required to start a reaction.
D) something important for chemical reactions.
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Question 7) The major components of the cell membrane are
A) carbohydrates and polysaccharides. B) proteins and carbohydrates.
C) lipids and carbohydrates. D) lipids and proteins.
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Question 8) Wrinkled and sagging skin results from
A) excess subcutaneous fat.
B) drinking too much water.
C) loss of subcutaneous fat, elastin, and collagen.
D) heredity only.
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Question 9) An acid reacting with a base is
A) hydrolysis. B) a synthesis reaction.
C) a decomposition reaction. D) an exchange reaction.
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Question 10) Extracellular matrix consists of
A) lacunae and lamellae. B) heparin and keratin.
C) ground substance and protein fibers. D) fixed cells and wandering cells.
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