Test 3 - Quiz #10

Question 1

Keratin filaments are anchored to junctions called
     A. Adherin junctions
     B. Tight junctions
     C. Desmosomes
     D. Gap junctions

Answer 1

C. Desmosomes

Question 2

Cell adhesion in molecules can be divided into four major groups. Which of the following is NOT one of the groups
     A. Selectins
     B. Integrins
     C. Collagens
     D. Immunoglobulin superfamily

Answer 2

C. Collagens

Question 3

Signaling by the steroid hormone estrogen is an example of \_\_\_\_\_\_ signaling?
     A. Autocrine
     B. Endocrine
     C. Paracrine
     D. Direct cell-to-cell

Answer 3

B. Endocrine

Question 4

Neurotransmitters act by binding to receptors that are
     A. Ligand - gated ion channels
     B. Located in the cytoplasm
     C. Tyrosine - kinase receptors
     D. Not coupled to G proteins

Answer 4

A. Ligand - gated ion channels

Question 5

Cyclic AMP (cAMP) is synthesized from ATP by the action of
     A. Phosphodiesterase
     B. Phosphorylase kinase
     C. Adenylyl cyclase
     D. Protein kinase A (PKA)

Answer 5

C. Adenylyl cyclase