Question 1

What structures are used for direct cell to cell signaling?

Accepted Answer

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

Question 2

Why are cells in body organs generally within 100 $\mu$m of a blood capillary?

Accepted Answer

A) to decrease mean diffusion time 
B) to increase mean diffusion time 
C) so that larger particles can diffuse more easily 
D) a larger distance maximizes entropy 
A) to decrease mean diffusion time 
B) to increase mean diffusion time 
C) so that larger particles can diffuse more easily 
D) a larger distance maximizes entropy

Question 3

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. 
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 4

Hydrophobic molecules usually enter a cell via __________.

Accepted Answer

A) osmosis 
B) active transport 
C) diffusion 
D) protein channels 
A) osmosis 
B) active transport 
C) diffusion 
D) protein channels

Question 5

Channels present in the membranes of some cells that allow rapid movement of water are called

Accepted Answer

A) water tubes. 
B) aqueducts. 
C) aquaporins. 
D) streams. 
A) water tubes. 
B) aqueducts. 
C) aquaporins. 
D) streams.

Question 6

The rate of diffusion increases as the concentration gradient increases.

Accepted Answer

A) True 
 B)False

Question 7

Osmoreceptors are involved in the regulation of blood volume.

Accepted Answer

A) True 
 B)False

Question 8

___________ g of sucrose (molecular weight = 342g)would be added to 1L of water to produce a 2.5 Osm solution.

Accepted Answer

A) 342 
B) 500 
C) 855 
D) 2.5 
A) 342 
B) 500 
C) 855 
D) 2.5

Question 9

Which of the following is NOT a general category of cell signaling molecules?

Accepted Answer

A) endocrine signaling 
B) enzymatic signaling 
C) paracrine signaling 
D) synaptic signaling 
A) endocrine signaling 
B) enzymatic signaling 
C) paracrine signaling 
D) synaptic signaling

Question 10

Cells placed in hypotonic solutions will

Accepted Answer

A) decrease in volume. 
B) increase intracellular solute concentration. 
C) increase in volume. 
D) lose water to the solution. 
A) decrease in volume. 
B) increase intracellular solute concentration. 
C) increase in volume. 
D) lose water to the solution.

Question 11

Plasma freezes at

Accepted Answer

A) -1.86$\circ$C. 
B) -1.00$\circ$C. 
C) -0.56$\circ$C. 
D) 0.00$\circ$C. 
A) -1.86$\circ$C. 
B) -1.00$\circ$C. 
C) -0.56$\circ$C. 
D) 0.00$\circ$C.

Question 12

Which of the following is able to passively penetrate the plasma membrane?

Accepted Answer

A) O2 
B) small charged particles 
C) large polar molecules 
D) All apply. 
A) O2 
B) small charged particles 
C) large polar molecules 
D) All apply.

Question 13

What type of junctional complex will prohibit paracellular transport?

Accepted Answer

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

Question 14

The transport maximum is related to the property known as

Accepted Answer

A) competition. 
B) saturation. 
C) specificity. 
D) inhibition. 
A) competition. 
B) saturation. 
C) specificity. 
D) inhibition.

Question 15

The charge difference across a membrane produces the membrane potential.

Accepted Answer

A) True 
 B)False

Question 16

A six molar sucrose (molecular weight = 342g)solution would contain

Accepted Answer

A) 57g sucrose per liter. 
B) 342g sucrose per liter. 
C) 1026g sucrose per liter. 
D) 2052g sucrose per liter. 
A) 57g sucrose per liter. 
B) 342g sucrose per liter. 
C) 1026g sucrose per liter. 
D) 2052g sucrose per liter.

Question 17

A one molal NaCl solution has the same osmolality as a one molal glucose solution.

Accepted Answer

A) True 
 B)False

Question 18

Proteins that extend from the cytoskeleton within the cell,through the plasma membrane,and into the extracellular matrix are

Accepted Answer

A) lysosomal proteins. 
B) metallo proteins. 
C) receptor proteins. 
D) integrin proteins. 
A) lysosomal proteins. 
B) metallo proteins. 
C) receptor proteins. 
D) integrin proteins.

Question 19

Diffusion ____________ the entropy of a solution.

Accepted Answer

A) decreases 
B) increases 
C) does not change 
A) decreases 
B) increases 
C) does not change

Question 20

Glucose entry into the cell is by facilitated diffusion.

Accepted Answer

A) True 
 B)False

What structures are used for direct cell to cell signaling?

Why are cells in body organs generally within 100 $\mu$ m of a blood capillary?

Matrix metalloproteinases

Hydrophobic molecules usually enter a cell via __________.

Channels present in the membranes of some cells that allow rapid movement of water are called

The rate of diffusion increases as the concentration gradient increases.

Osmoreceptors are involved in the regulation of blood volume.

___________ g of sucrose (molecular weight = 342g)would be added to 1L of water to produce a 2.5 Osm solution.

Which of the following is NOT a general category of cell signaling molecules?

Cells placed in hypotonic solutions will

Plasma freezes at

Which of the following is able to passively penetrate the plasma membrane?

What type of junctional complex will prohibit paracellular transport?

The transport maximum is related to the property known as

The charge difference across a membrane produces the membrane potential.

A six molar sucrose (molecular weight = 342g)solution would contain

A one molal NaCl solution has the same osmolality as a one molal glucose solution.

Proteins that extend from the cytoskeleton within the cell,through the plasma membrane,and into the extracellular matrix are

Diffusion ____________ the entropy of a solution.

Glucose entry into the cell is by facilitated diffusion.

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Cell Respiration and Metabolism

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,heart and Circulation

Cardiac Output, blood Flow, and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

Reproduction

Filters

Exam 6: Interactions Between Cells and the Extracellular Environment

What structures are used for direct cell to cell signaling?

Why are cells in body organs generally within 100 μ\muμ m of a blood capillary?

Matrix metalloproteinases

Hydrophobic molecules usually enter a cell via __________.

Channels present in the membranes of some cells that allow rapid movement of water are called

The rate of diffusion increases as the concentration gradient increases.

Osmoreceptors are involved in the regulation of blood volume.

___________ g of sucrose (molecular weight = 342g)would be added to 1L of water to produce a 2.5 Osm solution.

Which of the following is NOT a general category of cell signaling molecules?

Cells placed in hypotonic solutions will

Plasma freezes at

Which of the following is able to passively penetrate the plasma membrane?

What type of junctional complex will prohibit paracellular transport?

The transport maximum is related to the property known as

The charge difference across a membrane produces the membrane potential.

A six molar sucrose (molecular weight = 342g)solution would contain

A one molal NaCl solution has the same osmolality as a one molal glucose solution.

Proteins that extend from the cytoskeleton within the cell,through the plasma membrane,and into the extracellular matrix are

Diffusion ____________ the entropy of a solution.

Glucose entry into the cell is by facilitated diffusion.

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Cell Respiration and Metabolism

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,heart and Circulation

Cardiac Output, blood Flow, and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

Reproduction

Filters

Why are cells in body organs generally within 100 $\mu$ m of a blood capillary?