The movement of water across cell membranes has been an active area of research for more than 100 years and is of fundamental importance in the normal water metabolism of all terrestrial animals. The objective of this review is to integrate recent data obtained from the isolation and molecular ...
Plants. There are two basic types of movement in plants— passive and active. Passive, or hygroscopic, movements are caused by changes in the water content of the colloids that make up the cell membrane. In flowering plants, hygroscopic movements play an important role in spreading seeds and ...
example: peddling a bike uphill, from bottom to top osmosis the diffusion of water across the cell membrane; a type of passive transport meaning that it doesn't require cells to use energy to mover water across the cell membrane ; moves from high concentration to low concentration with the ...
Many animal species divide space into a patchwork of home ranges, yet there is little consensus on the mechanisms individuals use to maintain fidelity to particular locations. Theory suggests that animal movement could be based upon simple behavioural ru
thought he was slipping into death. He then ask the nurse to get him a bowl of water with earth in it and the whole night long he gently played with the mud. He recreated the experience when as a child he was playing in mud along a river’s bank. Pavlov knew that evoking the play...
Cell movement is a complex phenomenon primarily driven by the actin network beneath the cell membrane, and can be divided into three general components: protrusion of the leading edge of the cell, adhesion of the leading edge and deadhesion at the cell body and rear, and cytoskeletal contraction...
We now report that human melanocytes express high levels of kinesin, a molecule that participates in microtubule-associated transport of organelles in other cell types, and that ultrastructurally kinesin molecules are closely associated with melanosomes. To determine whether kinesin participates in melano...
Directional cell movement through tissues is critical for multiple biological processes and requires maintenance of polarity in the face of complex environmental cues. Here we use intravital imaging to demonstrate that secretion of exosomes from late end
This movement aid comprises a foldable frame with three plates which are connected in joints and form a Z and between which there are two two-cell bellows arranged opposite each other. They are operated by water or compressed air and cause a supplementary lifting movement to the seat plate. ...
Sensory systems allow animals to detect and respond to stimuli in their environment and underlie all behaviour. However, human induced pollution is increasingly interfering with the functioning of these systems. Increased suspended sediment, or turbidity