The directed movement of calcium (Ca) ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

The behavioral interactions between organisms for the purpose of mating, or sexual reproduction resulting in the formation of zygotes.

The behavioral interactions between organisms for the purpose of mating, or sexual reproduction resulting in the formation of zygotes.

The process in which an activated neuronal cell receptor conveys information down a signaling pathway, resulting in a change in the function or state of a cell. This process may be intracellular or intercellular.

The response by the male to a hermaphrodite after initial contact following mate finding. The male stops forward locomotion, presses the ventral side of his tail against his partner's body, and begins moving backward along the hermaphrodite. Male response behavior is initiated when sensory neurons located in the rays of his tail contact a potential mate.

Location, by the male, of his partner's vulva when backing along the ventral side of the hermaphrodite during mating. The male stops at the vulva, coordinates his movements to the hermaphrodite's, and positions his tail precisely over the vulva so that he may insert his spicules and ejaculate.

The specific behavior of a male organism that is associated with reproduction.

The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).

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

A specialized eukaryotic organelle that consists of a filiform extrusion of the cell surface and of some cytoplasmic parts. Each cilium is largely bounded by an extrusion of the cytoplasmic (plasma) membrane, and contains a regular longitudinal array of microtubules, anchored to a basal body.

A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

The long process of a neuron that conducts nerve impulses, usually away from the cell body to the terminals and varicosities, which are sites of storage and release of neurotransmitter.

A neuron projection that has a short, tapering, morphology. Dendrites receive and integrate signals from other neurons or from sensory stimuli, and conduct nerve impulses towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.

A membrane that is one of the two lipid bilayers of an organelle envelope or the outermost membrane of single membrane bound organelle.

The portion of a neuron that includes the nucleus, but excludes cell projections such as axons and dendrites.

Cytoplasm situated near, or occurring around, the nucleus.

The portion of the plasma membrane surrounding a cilium.

A dendrite that is found on a sensory neuron, and directly transduces a sensory signal from the sensory neuron to another neuron.

A cilium which may have a variable array of axonemal microtubules but does not contain molecular motors.