The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state.

Formation of the junction between an axon and the glial cell that forms the myelin sheath. Paranodal junctions form at each paranode, i.e. at the ends of the unmyelinated nodes of Ranvier.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a methylmercury stimulus.

Any process that modulates the frequency or rate of heart contraction.

The progression of the atrial septum over time, from its initial formation to the mature structure.

Any process involved in the maintenance of an internal steady state of calcium ions at the level of a cell.

The directed movement of substances from the endoplasmic reticulum (ER) to the Golgi, mediated by COP II vesicles. Small COP II coated vesicles form from the ER and then fuse directly with the cis-Golgi. Larger structures are transported along microtubules to the cis-Golgi.

Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.

Any process that modulates the frequency, rate or extent of cardiac muscle contraction via the regulation of the release of sequestered calcium ion by sarcoplasmic reticulum into cytosol. The sarcoplasmic reticulum is the endoplasmic reticulum of striated muscle, specialised for the sequestration of calcium ions that are released upon receipt of a signal relayed by the T tubules from the neuromuscular junction.

Any process that modulates the frequency, rate or extent of cardiac muscle contraction via the regulation of the release of sequestered calcium ion by sarcoplasmic reticulum into cytosol. The sarcoplasmic reticulum is the endoplasmic reticulum of striated muscle, specialised for the sequestration of calcium ions that are released upon receipt of a signal relayed by the T tubules from the neuromuscular junction.

Any process that modulates the frequency, rate or extent of cardiac muscle contraction by changing the calcium ion signals that trigger contraction.

Any process that affects the structure and integrity of a protein, altering the likelihood of its degradation or aggregation.

A process that is carried out at the cellular level that results in the assembly, arrangement of constituent parts, or disassembly of the T-tubule. A T-tubule is an invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril.

A process in which a protein is transported to, or maintained in, a location within an organelle.

A process in which a protein is transported to, or maintained in, a location within the external part of the cell wall and/or plasma membrane.

Any process in which a protein is transported to, and/or maintained in, a specific location at the level of a cell. Localization at the cellular level encompasses movement within the cell, from within the cell to the cell surface, or from one location to another at the surface of a cell.

Any process in which a protein is transported to, and/or maintained in, the M band. The M band is the midline of aligned thick filaments in a sarcomere.

A process in which a protein is transported to, or maintained in, the T-tubule. The T-tubule is an invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril.

Any process that activates or increases the frequency, rate or extent of the directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Any process involved in maintaining the structure and integrity of a protein and preventing it from degradation or aggregation.

Any process that modulates the frequency, rate or extent of the release into the cytosolic compartment of calcium ions sequestered in the endoplasmic reticulum or mitochondria.

Any process that modulates the frequency, rate or extent of the directed movement of calcium ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Any process that activates or increases the frequency, rate or extent of the directed movement of calcium ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Any process that modulates the frequency, rate or extent of cardiac muscle contraction.

Any process that modulates the establishment or extent of a membrane potential in the polarizing direction towards the resting potential in a ventricular cardiomyocyte.

The directed movement of calcium ions (Ca2+) into, out of or within the sarcoplasmic reticulum.

A process in which a protein is transported to, or maintained in, a location within the endoplasmic reticulum.

A process in which a protein is transported to, or maintained in, a specific location in the plasma membrane.

A process in which a protein is transported to, or maintained in, a specific location in the plasma membrane.

Any process that modulates the frequency, rate or extent of cardiac muscle cell contraction.

An action potential that occurs in a ventricular cardiac muscle cell.

An action potential that occurs in an atrial cardiac muscle cell.

An action potential that occurs in a sinoatrial node cardiac muscle cell.

The process in which SA node cardiac muscle cell membrane potential changes in the depolarizing direction from the negative resting potential towards the positive membrane potential that will be the peak of the action potential.

The process that mediates interactions between an atrial cardiomyocyte and its surroundings that contributes to the process of the atrial cardiomyocyte communicating with an AV node cell in cardiac conduction. Encompasses interactions such as signaling or attachment between one cell and another cell, between a cell and an extracellular matrix, or between a cell and any other aspect of its environment.

The process that mediates interactions between an SA node cardiomyocyte and its surroundings that contributes to the process of the SA node cardiomyocyte communicating with an atrial cardiomyocyte in cardiac conduction. Encompasses interactions such as signaling or attachment between one cell and another cell, between a cell and an extracellular matrix, or between a cell and any other aspect of its environment.

A cardiac conduction process that modulates the frequency or rate of heart contraction.

A cardiac conduction process that modulates the frequency or rate of heart contraction.

Any process that modulates the frequency, rate or extent of action potential creation, propagation or termination in an SA node cardiac myocyte. This typically occurs via modulation of the activity or expression of voltage-gated ion channels.

Any process that modulates the frequency, rate or extent of action potential creation, propagation or termination in an atrial cardiac muscle cell contributing to the regulation of its contraction. This typically occurs via modulation of the activity or expression of voltage-gated ion channels.

Any process that activates or increases the frequency, rate or extent of potassium ion transmembrane transporter activity.

Any process that modulates the frequency, rate or extent of calcium ion transmembrane transporter activity.

Any process that activates or increases the frequency, rate or extent of calcium ion transmembrane transporter activity.

Any process that activates or increases the frequency, rate or extent of cation channel activity.

The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Any of the various filamentous elements that form the internal framework of cells, and typically remain after treatment of the cells with mild detergent to remove membrane constituents and soluble components of the cytoplasm. The term embraces intermediate filaments, microfilaments, microtubules, the microtrabecular lattice, and other structures characterized by a polymeric filamentous nature and long-range order within the cell. The various elements of the cytoskeleton not only serve in the maintenance of cellular shape but also have roles in other cellular functions, including cellular movement, cell division, endocytosis, and movement of organelles.

A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.

Any of the small (10-200 nm), heterogeneous, highly dynamic, sterol- and sphingolipid-enriched membrane domains that compartmentalize cellular processes. Small rafts can sometimes be stabilized to form larger platforms through protein-protein and protein-lipid interactions.

The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

A complex cell-cell junction at which myofibrils terminate in cardiomyocytes; mediates mechanical and electrochemical integration between individual cardiomyocytes. The intercalated disc contains regions of tight mechanical attachment (fasciae adherentes and desmosomes) and electrical coupling (gap junctions) between adjacent cells.

The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.

Platelike region of a muscle sarcomere to which the plus ends of actin filaments are attached.

Invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril. The ends of T-tubules make contact with the sarcoplasmic reticulum membrane.

The midline of aligned thick filaments in a sarcomere; location of specific proteins that link thick filaments. Depending on muscle type the M band consists of different numbers of M lines.

The dark-staining region of a sarcomere, in which myosin thick filaments are present; the center is traversed by the paler H zone, which in turn contains the M line.

The outer membrane of a muscle cell, consisting of the plasma membrane, a covering basement membrane (about 100 nm thick and sometimes common to more than one fiber), and the associated loose network of collagen fibers.

Regular periodic sub membranous arrays of vinculin in skeletal and cardiac muscle cells, these arrays link Z-discs to the sarcolemma and are associated with links to extracellular matrix.