Question 1

Active transport proceeds when energy is expended.

Accepted Answer

A) True 
 B)False

Question 2

The osmotic pressure of a solution is directly related to its ___________ concentration.

Accepted Answer

A)  water
B)  solute
C)  solvent
D)  matrix

Question 3

Passive transport of water is known as

Accepted Answer

A)  filtration.
B)  osmosis.
C)  facilitated diffusion.
D)  a water pump.

Question 4

If the intracellular concentration of Ca2+ was 10mEq/L and the extracellular concentration was 150mEq/L,the Ca2+ equilibrium potential would be

Accepted Answer

A)  -35.9mV.
B)  -71.8mV.
C)  +35.9mV.
D)  +71.8mV.

Question 5

Plasma freezes at

Accepted Answer

A)  -1.86C.
B)  -1.00C.
C)  -0.56C.
D)  0.00C.

Question 6

Facilitated diffusion is unable to transport molecules against a concentration gradient.

Accepted Answer

A) True 
 B)False

Question 7

Movement of large molecules into a cell is called

Accepted Answer

A)  endocytosis.
B)  exocytosis.
C)  bulk transport.
D)  endocytosis AND bulk transport.

Question 8

Which G-protein subunit binds GDP?

Accepted Answer

A)  alpha subunit
B)  beta subunit
C)  gamma subunit
D)  delta subunit

Question 9

Diffusion ____________ the entropy of a solution.

Accepted Answer

A)  decreases
B)  increases
C)  does not change

Question 10

Ions like Ca2+ can be second messengers for cell signaling.

Accepted Answer

A) True 
 B)False

Question 11

What type of cell signaling occurs through the extracellular matrix to nearby target cells?

Accepted Answer

A)  endocrine signaling
B)  synaptic signaling
C)  gap junctions
D)  paracrine signaling

Question 12

What type of junctional complex will prohibit paracellular transport?

Accepted Answer

A)  tight junctions
B)  adherens junctions
C)  desmosomes
D)  gap junctions

Question 13

Bulk transport is required for the transport of large polar molecules into or out of cells.

Accepted Answer

A) True 
 B)False

Question 14

What molecules pass information from the polar regulatory molecule receptor to activate the enzymes that produce cAMP?

Accepted Answer

A)  paracrines
B)  G-proteins
C)  GTP
D)  None apply.

Question 15

The extracellular matrix is made up of collagen,elastin,and a gel-like ground substance.

Accepted Answer

A) True 
 B)False

Question 16

Cerebral edema would be treated with a(an) ___________ intravenous solution of mannitol.

Accepted Answer

A)  hypertonic
B)  hypotonic
C)  isotonic

Question 17

Matrix metalloproteinases

Accepted Answer

A)  produce the basal laminA.
B)  synthesize collagen in the extracellular matrix.
C)  may be active in invasive cancer cells.
D)  synthesize proteoglycans in the extracellular matrix.

Question 18

How much of the extracellular fluid comes from blood plasma?

Accepted Answer

A)  33%
B)  92%
C)  20%
D)  50%

Question 19

The glucose carrier of skeletal muscle is designated as

Accepted Answer

A)  GLUT2.
B)  GLUTSk.
C)  GLUT4.
D)  GLUT5.

Question 20

What structures are used for direct cell to cell signaling?

Accepted Answer

A)  desmosomes
B)  tight junctions
C)  exocytosis vesicles
D)  gap junctions

Exam 6: Interactions Between Cells and the Extracellular Environment

Bulk transport is required for the transport of large polar molecules into or out of cells.

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Passive transport of water is known as

Correct AnswerverifiedShow Answer

Plasma freezes at

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How much of the extracellular fluid comes from blood plasma?

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What structures are used for direct cell to cell signaling?

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What type of cell signaling occurs through the extracellular matrix to nearby target cells?

Correct AnswerverifiedShow Answer

If the intracellular concentration of Ca2+ was 10mEq/L and the extracellular concentration was 150mEq/L,the Ca2+ equilibrium potential would be

Correct AnswerverifiedShow Answer

Cerebral edema would be treated with a(an) ___________ intravenous solution of mannitol.

Correct AnswerverifiedShow Answer

The glucose carrier of skeletal muscle is designated as

Correct AnswerverifiedShow Answer

Which G-protein subunit binds GDP?

Correct AnswerverifiedShow Answer

What molecules pass information from the polar regulatory molecule receptor to activate the enzymes that produce cAMP?

Correct AnswerverifiedShow Answer

The extracellular matrix is made up of collagen,elastin,and a gel-like ground substance.

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Facilitated diffusion is unable to transport molecules against a concentration gradient.

Correct AnswerverifiedShow Answer

Ions like Ca2+ can be second messengers for cell signaling.

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What type of junctional complex will prohibit paracellular transport?

Correct AnswerverifiedShow Answer

Diffusion ____________ the entropy of a solution.

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Active transport proceeds when energy is expended.

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Movement of large molecules into a cell is called

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The osmotic pressure of a solution is directly related to its ___________ concentration.

Correct AnswerverifiedShow Answer

Matrix metalloproteinases

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If the intracellular concentration of Ca²⁺ was 10mEq/L and the extracellular concentration was 150mEq/L,the Ca²⁺ equilibrium potential would be

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Ions like Ca²⁺ can be second messengers for cell signaling.

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