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.
1 The Thylakoids contain Chlorophyll in which the process of Photosynthesis occurs. 2  Vesicles are membrane bound sacs that are used to store or transport substances around the cell. 3  Lysosomes are actually Vesicles. 4  Vacuoles are essentially larger Vesicles, and they are formed by the joining together of many Vesicles. Chloroplasts contain two fluid separated membranes and the inner membrane is folded into a network of flattened sacs called Thylakoids that are stacked into Grana (one Granum, two Grana). 2  The Thylakoids contain Chlorophyll in which the process of Photosynthesis occurs.