Term
| two components of the cytoskeleton |
|
Definition
microtubules
microfilaments |
|
|
Term
|
Definition
-make up the spindle that moves chromosomes to the mitotic poles at anaphase
-generate movements of cilia and flagella
- |
|
|
Term
|
Definition
-proteins that generate contractile forces by changing conformation
-dominant microfilament protein is actin
-reach their highest level of organization in muscle cells |
|
|
Term
|
Definition
-generate contractile forces responsible for cell movement and shape
-make up the contractile ring that divides an animal cell during cytokinesis
-endocytosis and amoeboid motion rely on their interactions
-lie parallel to eachother |
|
|
Term
|
Definition
-consist of a twisted chain of actin molecules
-microfilaments
-consist of a twisted chain of actin molecules |
|
|
Term
|
Definition
| -bundles of many myosin molecules |
|
|
Term
| 3 types of vertebrate muscle |
|
Definition
|
|
Term
|
Definition
-contraction for internal organs
-structurally simplest muscle cells
-single nucleus, long and spindle shaped
-unstriated
-arranged in sheets with gap junctions |
|
|
Term
| when smooth muscle is stretched... |
|
Definition
-the cells depolarize
-fire action potentials
-contraction
-helps move food along by peristalsis |
|
|
Term
|
Definition
-branched and appear striated
-have intercalated disks
-gap junctions=electrical contact
-have pacemaker cells
-autonemic |
|
|
Term
|
Definition
provide strong mechanical adhesions between adjacent cells
-in cardiac muscles |
|
|
Term
|
Definition
-given via pacemaker cells
-self-generated heartbeat |
|
|
Term
|
Definition
-aka striated muscle b/c of stripped appearance
-cells are called muscle fibers
-many nuclei |
|
|
Term
|
Definition
-large, many nuclei
-each is packed w/ bundles of myofibriles, each made up of thin actin units surrounding thick myosin units |
|
|
Term
|
Definition
|
|
