Activin receptors can be type I or type II and are cell surface transmembrane receptors with serine/threonine activity.

The directed movement of pyruvate, 2-oxopropanoate, into, out of or within a mitochondrion.

The directed movement of calcium ions (Ca2+) into, out of or within a mitochondrion.

oocyte dorsal/ventral axis determination (sensu Insecta)

The establishment, maintenance and elaboration of the dorsal/ventral axis of the oocyte. As in, but not restricted to, the true insects (Insecta, ncbi_taxonomy_id:50557). In Drosophila, formation of the oocyte dorsoventral axis occurs later in oogenesis, once the anteroposterior axis is established.

The directed movement of drugs into, out of, within or between cells.

maternal determination of dorsal/ventral axis, oocyte, germ-line encoded (sensu Insecta)

Polarization of the oocyte along the dorsal-ventral axis, by a gene product encoded by cells of the germ line. As in, but not restricted to, the true insects (Insecta, ncbi_taxonomy_id:50557).

The directed movement of eye pigment precursors, the inactive forms of visual pigments, into, out of, within or between cells.

The directed movement of oligopeptides into, out of, within or between cells. Oligopeptides are molecules that contain a small number (2 to 20) of amino-acid residues connected by peptide linkages.

establishment of oocyte nucleus localization during oocyte axis determination (sensu Insecta)

oocyte nucleus positioning during oocyte axis determination (sensu Insecta)

The re-positioning of the oocyte nucleus to a dorsal-anterior position in the egg chamber, an essential step in the establishment and maintenance of the dorsal/ventral axis of the oocyte. As in, but not restricted to, the true insects (Insecta, ncbi_taxonomy_id:50557).

The transport of substances that occurs outside cells.

The directed extracellular movement of carbohydrates.

oocyte nucleus migration during oocyte axis determination (sensu Insecta)

oocyte nuclear migration during oocyte axis determination (sensu Insecta)