Question 1

What are passages that exist between adjacent cells that allow movement of ions and small molecules?

Accepted Answer

A)  gap interchanges 
B)  gap exchanges 
C)  gap crossings 
D)  gap inter 
E)  gap junctions 
A)  gap interchanges 
B)  gap exchanges 
C)  gap crossings 
D)  gap inter 
E)  gap junctions

Question 2

Which of the following is correct concerning the sarcoplasmic reticulum Ca2+ ATPase?

Accepted Answer

A)  It is an example of an ABC transporter that interconverts between closed and open forms. 
B)  It transports Ca2+ from the sarcoplasmic reticulum into the cytoplasm. 
C)  This P-type ATPase maintains a calcium ion concentration of approximately 0.1 $\mu$M in the cytosol and 1.5 mM in the sarcoplasmic reticulum. 
D)  One Ca2+ is transported for each ATP hydrolyzed. 
E)  None of the answers is correct. 
A)  It is an example of an ABC transporter that interconverts between closed and open forms. 
B)  It transports Ca2+ from the sarcoplasmic reticulum into the cytoplasm. 
C)  This P-type ATPase maintains a calcium ion concentration of approximately 0.1 $\mu$M in the cytosol and 1.5 mM in the sarcoplasmic reticulum. 
D)  One Ca2+ is transported for each ATP hydrolyzed. 
E)  None of the answers is correct.

Question 3

Explain how a voltage-gated channel opens.

Accepted Answer

The voltage-gated channel is composed of

Question 4

What family of transport proteins possesses a separate domain or cassette that specifically binds ATP?

Accepted Answer

A)  glucose transporters 
B)  Na+-K+ ATPase 
C)  ABC proteins 
D)  bicarbonate transporters 
E)  None of the answers is correct. 
A)  glucose transporters 
B)  Na+-K+ ATPase 
C)  ABC proteins 
D)  bicarbonate transporters 
E)  None of the answers is correct.

Question 5

Cardiotonic steroids such as digitoxigenin inhibit the _______________________.

Accepted Answer

The answer of Cardiotonic steroids such as digitoxigenin inhibit the...

Question 6

What is another name for a nerve impulse?

Accepted Answer

A)  action impulse 
B)  action potential 
C)  ion potential 
D)  ion impulse 
E)  None of the answers is correct. 
A)  action impulse 
B)  action potential 
C)  ion potential 
D)  ion impulse 
E)  None of the answers is correct.

Question 7

The specific transport of a species down its concentration gradient is referred to as _______________________.

Accepted Answer

passive tr

Question 8

Aquaporins are found in high levels in all of the following tissues except

Accepted Answer

A)  the kidneys. 
B)  salivary glands. 
C)  the cornea. 
D)  red blood cells. 
E)  the liver. 
A)  the kidneys. 
B)  salivary glands. 
C)  the cornea. 
D)  red blood cells. 
E)  the liver.

Question 9

ABC transporters utilize ____________ to accomplish active transport.

Accepted Answer

The answer of ABC transporters utilize ____________ to accomplish active...

Question 10

What is the general term for membrane transporters that couple uphill transport of one species to the downhill flow of another species?

Accepted Answer

A)  cotransporters 
B)  antiporters 
C)  symporters 
D)  uniporters 
E)  None of the answers is correct. 
A)  cotransporters 
B)  antiporters 
C)  symporters 
D)  uniporters 
E)  None of the answers is correct.

Question 11

What is in the structure of aquaporin that prevents the transport of ions as well as water?

Accepted Answer

Two loops containing hydrophil

Exam 13: Membrane Channels and Pumps

What are passages that exist between adjacent cells that allow movement of ions and small molecules?

Which of the following is correct concerning the sarcoplasmic reticulum Ca2+ ATPase?

Explain how a voltage-gated channel opens.

What family of transport proteins possesses a separate domain or cassette that specifically binds ATP?

Cardiotonic steroids such as digitoxigenin inhibit the _______________________.

What is another name for a nerve impulse?

The specific transport of a species down its concentration gradient is referred to as _______________________.

Aquaporins are found in high levels in all of the following tissues except

ABC transporters utilize ____________ to accomplish active transport.

What is the general term for membrane transporters that couple uphill transport of one species to the downhill flow of another species?

What is in the structure of aquaporin that prevents the transport of ions as well as water?

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

Which of the following is correct concerning the sarcoplasmic reticulum Ca²⁺ ATPase?