Quiz 5 Cell signaling

Question 1

What class of intercellular signaling includes neurotransmitters and growth factors that diffuse a short distance from the cells that secrete them to stimulate receptors on nearby target cells?

Answer 1

paracrine

Question 2

What type of intracellular signal are the small chemicals like cyclic adenosine monophosphate (cAMP) and inositol triphosphate (IP3) that are produced in response to the activation of a cell surface receptor?

Answer 2

2nd messenger cAMP and IP3

Question 3

In the signal transduction pathway following activation of the beta-adrenergic receptor, what enzyme is directly activated by cyclic adenosine monophosphate (cAMP)?

Answer 3

protein Kinase A(PKA)

Question 4

What type of receptor is the epidermal growth factor receptor (EGFR)?

Answer 4

Enzyme linked receptor

Question 5

What type of receptor is the beta-adrenergic receptor?

Answer 5

G- protein- linked receptor

Question 6

What class of intercellular signaling includes hormones that travel in the blood to stimulate receptors on cells throughout the body?

Answer 6

endocrine

Question 7

What type of receptors are activated by steroid hormones like testosterone, estrogen, progesterone, aldosterone, and cortisol?

Answer 7

internal(intracelullar) receptors

Question 8

What type of receptor is the nicotinic acetylcholine receptor?

Answer 8

ion hannel- linked receptor(ligand gated ion channel)

Question 9

What type of enzymes phosphorylate other proteins in a phosphorylation cascade?

Answer 9

kinases

Question 10

In the phosphorylation cascade activated by the epidermal growth factor receptor, what enzyme is phosphorylated by MEK and then becomes activated to phosphorylate many target proteins (including Cdc25) leading to mitosis?

Answer 10

ERK