A(n) ____________________ solution has the same concentration of non-penetrating solutes as normal body cells.
Fill in the blank(s) with correct word
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Question 2) ____ are adhering junctions, ____ are impermeable junctions, and ____ are communicating junctions.
a. Tight junctions, gap junctions, desmosomes
b. Desmosomes, gap junctions, tight junctions
c. Gap junctions, desmosomes, tight junctions
d. Gap junctions, tight junctions, desmosomes
e. Desmosomes, tight junctions, gap junctions
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Question 3) Osmolarity is expressed in ____________________.
Fill in the blank(s) with correct word
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Question 4) Tight junctions
a. prevent passage of materials into epithelial cells
b. force materials to pass between cells
c. are commonly found in digestive tract linings
d. comprise part of the glycocalyx
e. consist of cadherin proteins
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Question 5) In many cell types, membrane proteins form ____________________, which are channels specific for the passage of water.
Fill in the blank(s) with correct word
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Question 6) Which of the following solutions has a lower osmotic pressure than a human cell's cytosol?
a. 2 NaCl
b. 200 mOsm of NaCl
c. 0.9 NaCl
d. 300 mOsm of NaCl
e. 280 mOsm of glucose
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Question 7) The net effect of simultaneous electrical and concentration gradients on an ion is called a(n) ____________________ gradient.
Fill in the blank(s) with correct word
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Question 8) Which statement about gap junctions is incorrect?
a. They consist of protein.
b. They are anchored to plaques on the inside surface of the plasma membrane.
c. They allow materials to pass from one cell into an adjacent cell.
d. They play a role in transmitting electrical activity through the heart.
e. They consist of connexons.
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Question 9) ____________________ forces require the cell to expend energy in transporting a substance across the membrane.
Fill in the blank(s) with correct word
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Question 10) Which of the following is not part of the extracellular matrix?
a. complex carbohydrates
b. connexons
c. collagen
d. elastin
e. fibronectin
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