Actin and Myosin in Non-skeletal muscle cells Flashcards
What are 5 examples of actin and myosin in non skeletal muscle cells
Cytokinesis
Smooth muscle
Vesicle transport
Cytoplasmic streaming
cell migration
What is seen in contractile rings
Actin myosin orginzation is seen in contractile rings gets smaller smaller by de polymerizing
Where is smooth muscle contraction present
Arteries and intestines and is not voulntary
What is relaxation
When the myosin is folded and inactive
How does Calcium play a role in smooth muscle contraction
When it is present it activates a kinase CaM which goes to phosphorylate Myosin light chain that will activate myosin heavy chain that can now hold onto the actin
What a regulator of smooth muscle contraction
Myosin phosphorylation
Whats the difference between smooth muscle contraction and skeletal muscle
Smooth muscle is much slower and more persistent contaction than skeletal muscle also there is no troponin and tropmyosin so it can last for much longer
What are Myosin V bound vesicles
They are carried along actin fillaments
When is myosin v unactive
When there is no cargo
Why do you want the nucleus to be close to the bud
Because half of its DNA goes into the daughter cell
What is the actin doing in a yeast buding cell
It provides a pathway that leads into the bud
what transports structures get into the bud
Myosin 5
What capps the actin
Formin
What postions the nucleus
MT
Which way is the actin polymerzing
It is growing in the negative end so the positive end stays in the bud
Where does cytoplasmic streaming occur
Usually occurs in plant cells and helps with difuusion can occur in us but not for diffusion
What filopodia formation
Finger like projections from bundles
What is lamellipodia formation
Large movement of actin pushed from networks
How do membranes move forward
Because the actin is polymerzing
What are fochal adhesions
Serve as anchoring points for actin filaments providing structural support and enabling cells to respond to their enviorment
What are integrins
Involves trans membrane proteins
What does Cyclo and cAMP do on the cell surface
Tell s the cell where to go and moves the cell to a high concentration
What is a receptor
It is around the entire cell because the cell has to know where to go
Where is the direction going to go
Towards high concentration