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.
The contractile vacuole enlarges as water enters then abruptly contracts, forcing the water out of the cell through a special pore structure. Vacuoles work with the cell membrane to move materials in and out of the cell. They also work with the lysosomes of a cell to digest cellular materials. Vesicle Vacuoles are basically vesicles filled with mostly water. A vesicle is a small bubble in a cell. This bubble is similar to a plasma membrane, consisting of a lipid bi-layer.