Nros 310 exam 3 - Study guides, Class notes & Summaries

What are the three main components of the cytoskeleton and what are their main functions? correct answers Microtubules, microfilaments and intermediate filaments that help form the cytoskeleton to create stability, structure, and allow movement What are the main similarities and differences between the three components of the cytoskeleton? correct answers Microfilaments: flexible, smallest, regulate motion, help stabilize, polymerized from monomers to polymers Microtubules: less flexible, ...

Cytoskeleton: A) 3 main components B) main functions correct answers A) actin filaments, microtubules, and intermediate filaments B) actin - sense the environment and direct movement microtubules - for transport intermediate - help keep the cell shape, to anchor organelles What are the main similarities and differences between the three components of the cytoskeleton? correct answers Main similarities: - all important for cytoskeleton structure - MT & Fila: charged ends; form a...

What are the three main components of the cytoskeleton and what are their main functions? correct answers Microfilaments: movement microtubules: transport of cellular materials intermediate: support What are the main similarities and differences between the three components of the cytoskeleton? correct answers all are important for cytoskeleton structure differ in size Describe how the assembly of actin filaments is regulated. Include both the role of associated protein and monomer co...

Describe endocrine, paracrine, and autocrine signaling. correct answers Endocrine: An endocrine cell releases a hormone into the blood stream to target a receptor on the target cell. Paracrine: A signaling cell releases a local mediator to target cells (neighboring cells). Autocrine: A cell releases a chemical signal to target itself. How does a hormone that is released generally throughout the body end up having different effects on (or no effects on) different cells? correct answers H...

NROS 310 Exam 3 questions with correct answers

Why are there motor proteins associated with both actin filaments and microtubules but not intermediate filaments? - Answer Actin filaments and microtubules are highly polarized, therefore allowing motor proteins to form associations with them. Intermediate filaments are unpolarized and do not bind nucleotides such as ATP, leading to lack of motor protein associations (which are ATP driven). How does the hydrolysis of ATP cause myosin to move along the actin filament? - Answer ATP hydroly...

What are the three main components of the cytoskeleton and what are their main functions? - Answer Actin/microfilament: critical in muscle contraction, in microvili Microtubules: organized, extend out from nucleus (except neurons), form flagella Intermediate filaments: structural integrity What are the main similarities and differences between the three components of the cytoskeleton? - Answer Actin: small and flexible, dynamic, in every cell Microtubules: large and less flexible, dyna...

Why are there motor proteins associated with both actin filaments and microtubules but not intermediate filaments? - Answer Actin filaments and microtubules are highly polarized, therefore allowing motor proteins to form associations with them. Intermediate filaments are unpolarized and do not bind nucleotides such as ATP, leading to lack of motor protein associations (which are ATP driven). How does the hydrolysis of ATP cause myosin to move along the actin filament? - Answer ATP hydroly...

What are the three main components of the cytoskeleton and what are their main functions? - Microfilaments: movement microtubules: transport of cellular materials intermediate: support What are the main similarities and differences between the three components of the cytoskeleton? - all are important for cytoskeleton structure differ in size Describe how the assembly of actin filaments is regulated. Include both the role of associated protein and monomer concentration. - Rac/Rho/CDC43 tri...

What are the three main components of the cytoskeleton and what are their main functions? - ANSWER Microfilaments (actin): sense the environment and direct movement Intermediate Filaments: maintain cell shape/structure, anchor organelles Microtubules: for transport What are the main similarities and differences between the three components of the cytoskeleton? - ANSWER Similarities: -important for cytoskeletal structure -charged ends; form a highway for motor protein Differences: ...