Epithelium

The human body is split up into several systems, which each have their own set functions (Kinworthy, 5). Every system has their own limitations of what they can do. This is due to differentiation the cells within each system become specialized for specific functions (Martini, & Bartholomew, 2). If something were to happen to one of your systems, your body’s other systems could not help because their cells do not have the ability to do what the other systems cells did (Kinworthy, 5). An example…

The role of circadian rhythms and clock genes in cutaneous wound healing Introduction The governing of rhythmic changes involved in daily behaviour and/or physiology is controlled by light/dark cycles. The field of Chronobiology encompasses biological timings (hormone secretion, blood pressure, reproductive cycles, body temperature, sleep, locomotor activity). Circadian rhythms have been discovered to play a major role in the mental, physical and behavioural changes, which follow a 24 hour…

Goodpasture syndrome is classified as an autoimmune disease due to B and T-cell mediated responses that result in the patient’s body to development antibodies against its own normal tissue, specifically the basement membranes of the glomerulus (glomerular basement membranes) and of the lungs (alveolar basement membranes) More specifically, the antibodies are developed against the noncollagenous domain 1 of the alpha 3-chain of type IV collagen). The noncollagenous domain 1 alpha 3 chain of type…

1.1 Background Our skin comprised of two main parts – epidermis and dermis. Epidermis is the superficial and thinner portion which serves to protect the skin and underlying tissues from abrasions, heat, microbes and chemicals. The deeper and thicker connective tissue portion called as dermis hosts several accessory structures of the skin like hair follicles, oil (sebaceous) glands and sweat (sudoriferous) glands. Sebaceous glands secrete greasy substances called sebum that will moistens the…

What does the term neroglia mean? What are the 4 types of neuroglia cells in the CNS? Discuss this in detail. Neuroglia is a group of cells, in the nervous tissue that supports neurons that keeps the nervous system functioning and together. The 4 types of neuroglis cells of the CNS: (1.) Astrocytes are cells that support and structure cells that is a barrier for the brain through blood. (2.) Microglial cells are cells that remove dirt and attack microbes. (3.) Ependymal cells are cells that…

The skin is organized in two parts: the epidermis and the dermis. The epidermis is the thin outer covering of the skin. It serves as a permanent protective barrier that helps to keep out everything from water to microorganisms. Additionally, it has the task to renew itself if cut or damaged in anyway. Furthermore, the epidermis also help to produce a water resistant protein called keratin, which helps the growth of hair and fingernails. The dermis is the inner layer of the skin that is mostly…

Epidermis is the tough outermost layer of the skin, and is made up of the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. It is mainly comprised of the protein keratin, squamous epithelial cells and melanin. The epidermis acts as a waterproof barrier and the melanin absorbs ultra violet light to prevent burns, inflammation, and swelling of the skin. Dermis is the lower layer of the skin that contains collagen, nerve fibers, lymph vessels, and blood…

What are the nonpolar parts of a phospholipid? c. Tail group 4. This is the only polar portion of a cholesterol molecule and it forms hydrogen bonds with the polar heads of phospholipids. d. –OH group 5. This type of membrane protein will extend throughout the entire membrane touching both the Intracellular fluid and the Extracellular fluid. e. Integral proteins f. Transmembrane proteins g. Integral proteins and Transmembrane proteins Ans: D…

Layers of Epidermis: 1. Stratum basale: The stratum basale or stratum germinativum is a continuous layer which gives rise to keratinocytes. It is usually described as one cell thick .this is the base or bottom made of living cuboidal keratinocytes that undergo cell division (mitosis ) they also have melanocytes that make melanin( dark pigment ). 2. Stratum Spinosum: the stratum spinosum or prickle cell layer is so called because the cells are given a spiny appearance by the numerous desmosomes…

Facial cleanser for all skin type Overview There are four different skin types that people have. They include; normal ski, dry skin, oily skin and a combination of all skin types. Young children mostly have the normal skin but as for the rest beginning from those who are teenagers can have any skin type. There are specific cleansers which are meant specific skin types whereby you are supposed to use them in case you are sure of your skin type. There are others that are deeply discussed below…