CBE 3 questions with 100% correct answers rated A+ 2023/2024 already passed

CBE 3 T/F Talking to people at a party is similar to paracrine signaling while a radio announcement is similar to autocrine. - correct answer False, paracrine signaling is party however a radio announcement is similar to endocrine signaling. Autocrine signaling would be talking to yourself All cell responds to the same signal in the same way - correct answer False, cells may respond differently to the same signal and depends on the internal workings of the cell Actin, microtubules, and intermediate filaments have ends with defined polarity - correct answer False, actin and mt have defined polarity. Intermediates do not have defined polarity due to 2 strands oriented in opposite direction Tight junctions have one function - correct answer False: many functions: cell-cell junction, separation of spaces, and prevention of movement in proteins and lipids between apical and basal layer define treadmilling and dynamic stability - correct answer treadmilling: adding subunits to equalize the rate of losing subunits at the other end dynamic instability: cycle of growth and shrinkage which involves catastrophe and rescue contact type of tight junctions - correct answer cell-cell contact type of adherens junctions - correct answer cell-cell contact type of gap junctions - correct answer cell-cell contact type of hemidesmosomes - correct answer cell-matrix transmembrane adhesion protein tight junctions - correct answer occludin transmembrane adhesion protein adherens junctions - correct answer cadherins transmembrane adhesion protein gap junctions - correct answer connexins transmembrane adhesion protein hemidesmosomes - correct answer integrins intracellular cytoskeletal attachment of tight junctions - correct answer actin intracellular cytoskeletal attachment of adherens junctions - correct answer actin intracellular cytoskeletal attachment of gap junctions - correct answer N/A intracellular cytoskeletal attachment of hemidesmosomes - correct answer intermediate one intracellular anchor protein of tight junctions - correct answer Zo one intracellular anchor protein of adherens junctions - correct answer a-catanin one intracellular anchor protein of gap junctions - correct answer N/A one intracellular anchor protein of hemidesmosomes - correct answer plectin subunit of actin - correct answer globular actin overall strcture of actin - correct answer 2 stranded helix one function of actin - correct answer whole cell locomotion nucleation proteins of actin - correct answer ARP