Question 1

An action potential triggers the release of a(n)

Accepted Answer

A)   Eicosanoid
B)   Neurotransmitter
C)   Paracrine
D)   Peptide hormone
E)   Steroid hormoneF) B) and D)
G) B) and C)

Question 2

Which of the following functions by diffusing across the cell membrane to bind to intracellular protein receptors, resulting in gene activation or repression?

Accepted Answer

A)   Acetylcholine
B)   Insulin
C)   Nitric oxide
D)   Prostaglandin
E)   TestosteroneF) A) and C)
G) C) and E) E

Question 3

The binding of a ligand to a G protein--coupled receptor will result in activation of adenylyl cyclase, which in turn will initiate which of the following pathways?

Accepted Answer

A)   Ca2+ -calmodulin
B)   cAMP
C)   cGMP
D)   MAP kinase
E)   Phospholipase C-Ca2+F) B) and E)
G) A) and D)

Question 4

Which of the following is most likely to initiate apoptosis?

Accepted Answer

A)   Apaf-1
B)   Bcl-2
C)   Caspase 3
D)   Caspase 9
E)   DNA protein kinaseF) None of the above
G) A) and D)

Question 5

A secreted chemical messenger meant to act on an adjacent cell is called a(n)

Accepted Answer

A)   Autocrine
B)   Hormone
C)   Neurohormone
D)   Neurotransmitter
E)   ParacrineF) A) and B)
G) A) and C) E

Question 6

A ligand binding to a(n)  _____ receptor directly results in phosphorylation

Accepted Answer

A)   Cytokine
B)   G protein-coupled
C)   Intracellular
D)   Threonine kinase
E)   Tyrosine kinaseF) B) and D)
G) B) and E) E

Exam 3: Cell Signaling

An action potential triggers the release of a(n)

Correct Answer
verified

Which of the following functions by diffusing across the cell membrane to bind to intracellular protein receptors, resulting in gene activation or repression?

Correct Answer
verified
E

The binding of a ligand to a G protein--coupled receptor will result in activation of adenylyl cyclase, which in turn will initiate which of the following pathways?

Correct Answer
verified

Which of the following is most likely to initiate apoptosis?

Correct Answer
verified

A secreted chemical messenger meant to act on an adjacent cell is called a(n)

Correct Answer
verified
E

A ligand binding to a(n) _____ receptor directly results in phosphorylation

Correct Answer
verified
E

Exam 3: Cell Signaling

An action potential triggers the release of a(n)

Correct AnswerverifiedShow Answer

Which of the following functions by diffusing across the cell membrane to bind to intracellular protein receptors, resulting in gene activation or repression?

Correct AnswerverifiedE

The binding of a ligand to a G protein--coupled receptor will result in activation of adenylyl cyclase, which in turn will initiate which of the following pathways?

Correct AnswerverifiedShow Answer

Which of the following is most likely to initiate apoptosis?

Correct AnswerverifiedShow Answer

A secreted chemical messenger meant to act on an adjacent cell is called a(n)

Correct AnswerverifiedE

A ligand binding to a(n) _____ receptor directly results in phosphorylation

Correct AnswerverifiedE

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified
E