Question 1

Which of the following chemical messengers are lipophilic?

Accepted Answer

A)   thyroid hormones
B)   eicosanoids
C)   peptides/proteins
D)   steroids
E)   steroids, eicosanoids, and thyroid hormoneF) A) and B)
G) C) and D)

Question 2

The enzyme that catalyzes synthesis of cAMP is called________and is activated by ______

Accepted Answer

A)   phosphodiesterase : a Gs protein
B)   phosphoprotein phosphatase : a Gi protein
C)   adenylate cyclase : a Gi protein
D)   phosphodiesterase : a Gi protein
E)   adenylate cyclase : a Gs proteinF) C) and D)
G) B) and E)

Question 3

Thyroid hormones alter the transcription of mRNA in the target cell.

Accepted Answer

A) True 
 B)False

Question 4

Tyrosine kinases are enzymes that add a phosphate group to tyrosine residues on other proteins, changing the conformation of those proteins.

Accepted Answer

A) True 
 B)False

Question 5

Lipophilic chemical messengers are poorly soluble in water. However, many of these lipophilic messengers are transported throughout the body. Their transport in blood (water)  is facilitated by

Accepted Answer

A)   carrier proteins.
B)   lipoproteins.
C)   white blood cells.
D)   chylomicrons.
E)   red blood cells.F) A) and C)
G) C) and D)

Question 6

As free hormones bind to their receptors and no more hormone is released from their cell of origin, the concentration of hormone bound to carrier proteins will

Accepted Answer

A)   denature.
B)   have a greater affinity.
C)   increase.
D)   become saturated.
E)   decrease.F) C) and D)
G) C) and E)

Exam 5: Chemical Messengers

Tyrosine kinases are enzymes that add a phosphate group to tyrosine residues on other proteins, changing the conformation of those proteins.

Correct Answer
verified

Lipophilic chemical messengers are poorly soluble in water. However, many of these lipophilic messengers are transported throughout the body. Their transport in blood (water) is facilitated by

Correct Answer
verified

As free hormones bind to their receptors and no more hormone is released from their cell of origin, the concentration of hormone bound to carrier proteins will

Correct Answer
verified

Thyroid hormones alter the transcription of mRNA in the target cell.

Correct Answer
verified

The enzyme that catalyzes synthesis of cAMP is called__and is activated by

Correct Answer
verified

Which of the following chemical messengers are lipophilic?

Correct Answer
verified

Exam 5: Chemical Messengers

Tyrosine kinases are enzymes that add a phosphate group to tyrosine residues on other proteins, changing the conformation of those proteins.

Correct AnswerverifiedShow Answer

Lipophilic chemical messengers are poorly soluble in water. However, many of these lipophilic messengers are transported throughout the body. Their transport in blood (water) is facilitated by

Correct AnswerverifiedShow Answer

As free hormones bind to their receptors and no more hormone is released from their cell of origin, the concentration of hormone bound to carrier proteins will

Correct AnswerverifiedShow Answer

Thyroid hormones alter the transcription of mRNA in the target cell.

Correct AnswerverifiedShow Answer

The enzyme that catalyzes synthesis of cAMP is called________and is activated by ______

Correct AnswerverifiedShow Answer

Which of the following chemical messengers are lipophilic?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The enzyme that catalyzes synthesis of cAMP is called__and is activated by

Correct Answer
verified

Correct Answer
verified