Vesicle

tyrosine interacts with the enzyme tyrosine hydroxylase, it becomes L-Dopa, and when that precursor interacts with the enzyme DOPA decarboxylase, the outcome is dopamine. Then, the second step is storage. This is when the neurotransmitters are stored in vesicles, which fuse to the membrane so they can be released. This release is the third step and it is called exocytosis. Exo- meaning outside, cyto- meaning cell and -sis referring to a process. In other words, the process in which a…

QUESTION No 1 How eggs and sperms are produced? Explain in detail the mechanism of fusion of Egg and sperm in human? ANSWER: Gametogenesis is the formation of the sex cells in multicellular eukaryotes. The word Gameto mean the gametes and genesis for formation of . Gametes typically come in male (sperm) and female (eggs). In human , the process involves two specialized cell divisions. The purpose is to create a haploid cell able to be well-suited with another haploid cell. Sperms is formed…

to lipid rafts in post Golgi rather than lysosomes can promote Aβ accumulation [69](Vetrivel et al., 2004). Sphingosine is associated with apoptosis and is elevated in AD brains [30](Hagen-Euteneuer et al., 2012). Sphingosine also plays a role in vesicle fusion and exocytosis [16;48;59](Rohrbough et al., 2004;Darios et al., 2009;Lutjohann et al., 2012). Increased cholesterol increases the risk of AD and more cholesterol in membranes have been associated with larger lipid raft size and…

In a human body, there are four core classifications of tissues, which are epithelial tissue (plural form epithelium), connective tissue, nervous tissue, and muscle tissue. And each of these tissues has its own unique function in our body that makes us a perfect complement function organism. In the beginning, the simplest structural elements or atoms such as calcium (Ca +2) or sodium (Na +1) involve in the basic unit of living matter. These matters combine to form other matters like the fusion…

It has a first line of defense and a second line of defense that have been present since birth. When we call it nonspecific immunity we mean that they don’t necessarily know what type of virus, what type of bacteria, or what type of foreign substance it is. They generally respond to things that are bad. All they know is that they see something that isn’t suppose to belong and they respond to it, but they don’t remember it. The first line of defense includes the physical and chemical barriers…

presynaptic neuron. Depressing synapses are characterized by high starting release probability. Thus, there are large amounts of neurotransmitter release at beginning of stimulus train. However, this large amount of release depletes the number of vesicles readily available for release. As a result, the amount of release declines as stimulus train proceeds. Thus,…

The Bodies exhibition showcases preserved human bodies dissected to display bodily system. The exhibit is set up so that one started at the skeletal system. The skeletal system showed the skeletal, the whole body bone include the ribs, large bone call femur and small bone call fibula, adult skull and infant skull. They also showed the prone bone that showed the bone disease as osteoarthritis and osteoporosis. Second system I learn is muscular system, the muscular system showed the muscular…

The most common sexually transmitted disease in the United States is chlamydia and the disease may cause serious damage to an individual’s body (Pommerville, 2014). Many individuals are usually unaware that they are a carrier of the disease due to unnoticeable symptoms. Chlamydia may be passed through vaginal, oral, or anal sex, and may me passed from mother to her fetus. No individual is immune to this sexually transmitted disease. Knowing the characteristics of the microorganism, the…

Viral pathogens use liver cells to replicate, then attach to their lipid droplets to to accumulate, assemble and bud off into the rest of the body. Liver produces and secretes LDL, VLDL and HDL which are taken up by every cell in the body that uses cholesterol, including the liver cells that take them up too.2 Viruses hijack these lipoproteins and use them to get into the liver cells, where they replicate, which opens up a gateway to the rest of the body. They replicate within the endoplasmic…

Papillomaviruses are thought to have two methods of replication: • Stable replication of the episomal genome in basal cells • Runaway, or vegetative, replication in more differentiated cells to generate progeny virus. “Viral multiplication is confined to the nucleus. Consequently, infected cells exhibit a high degree of nuclear atopia. Koilocytosis (from Greek koilos “empty”) describes a combination of perinuclear clearing (halo) with a pyknotic or shrunken (raisinoid) nucleus and is a…