Chemical Messengers 3. Hormones â¢Longârange messengersâ¢Secreted into blood by endocrine glands in response to appropriate signalâ¢Exert effect on target cells some distance away from release site 4.hemical Messengers 3. Hormones â¢Longârange messengersâ¢Secreted into blood by endocrine glands in response to appropriate signalâ¢Exert effect on target cells some distance away from release site 4.
Scale box in millimeters. Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside.
For this reason, vesicles can digest cellular machinery and recycle cellular materials. To transport materials into or out of the cell, vesicles fuse with the cellâs plasma membrane and release or uptake contents from outside of the cell. In total, there are four main types of vesicles. Vacuoles are vesicles that contain mostly water and are found in plant cells. They transport water in and out of the cell.