Sweating is where sweat from our skin is evaporated in order to decrease our core temperature. Vasodilation is where the blood vessels dilate due to the rise in body temperature; this allows more blood to flow near the surface. The blood then loses heat through the skin, this assists with cooling the circulating blood. Vasoconstriction is the response to the body temperature decreasing; the blood vessels constrict preventing warm blood from nearing to the surface- thus the reduction in heat being lost. Shivering is our bodies response to our temperature falling, muscles around vital organs start shake in minute movements- this creates energy which increases warmth.
To maintain control of the water content inside the body the concentration of urine must be balanced, to make sure this is done the temperature of the body must be kept at a reasonable temperature because if the body is too hot then a lot of water will be lost through sweat. Water is lost from our body through the lungs when we exhale, our skin when we begin to sweat and the water that we loose through urination. http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/homeo/homeostasis1.shtml P6 – Within your report explain what each measurement means and also what the changes show. Throughout the activity we had to measure our Blood Pressure, Pulse Rate, Respiratory rate and temperature. Blood Pressure is the pressure at which blood is pushed through the vessels in your body and also how strong it is.
These dead cells are firmly attached to one another and are keratinised and they protect the living cells beneath them and help prevent water loss. b) How does the skin assist in body temperature control? • Sweat glands produce a liquid that is released through the pores in the epidermis. When this liquid is released on the surface of the body it evaporates and this in turn
Cold blooded animals don't do this (which is why they eat less and live longer), so their temperature could fluctuate with environmental changes. This would be bad for them (think of the optimum temperatures for enzymes etc.) so they need to regulate this. Water's high specific heat capacity means that it needs a lot of energy to warm up, or it needs to lose a lot of energy to cool down. Animals that have a lot of water in them need larger environmental temperature changes to effect their body temperature.
Kool- Aid Dissolving Latent Lab Introduction In this latent lab the class tested to see how kool- aid capsules would react in different Temperatures of water. The purpose of this lab was to see how viruses react when they enter into a cell. There were many principles used for this particular lab. The hypothesis drawn was that The Kool- aid capsules would dissolve faster in the hotter water. This hypothesis was chosen because it’s easier to digest hot water than it cold.
Identifying skin changes and limb swelling The skin is often referred to as the largest body organ and serves as the main protective barrier to prevent damage to internal tissues from trauma, ultraviolet light, temperature variations, toxins and bacteria. Each component of the skin has a role to play in protecting the body. The skin consists of two main layers, the epidermis or outer layer and the dermis which lies beneath the epidermis. Collagen and elastin are major components of the skin; they help to give support, strength and elasticity to the skin. As we age individual components within the skin decline in a variety of ways and the skin is less able to function normally.
b. He internal environment of our bodies must have certain conditions within tolerable limits to continue the healthy functioning of us. c. Our skin plays a serious role in homeostasis by keeping a level body temperature as to not damage our internal organs, it absorbs sunlight and other nutrients we need, it also excretes things that we no longer need such as waste and maintains the temperature by sweating to cool our bodies. IV. The Anatomy of the Integumentary System.
(Marieb, E., & Hoehn, K. (2013) pg 160) When active muscles generate large amounts of heat it increases blood flow and activates sweat glands in the skin. (Marieb, E., & Hoehn, K. (2013) pg 168) Eccrine sweat glands are abundant on the palms, soles of the feet, and the forehead. (Marieb, E., & Hoehn, K. (2013) pg 160) Their major role is thermoregulation, meaning keeping the body from overheating, by forcing sweat into and through the glands to the skin surface. (Marieb, E., & Hoehn, K. (2013)pg 160-161) These glands also eliminate waste products, water and salt through sweating. The apocrine sweat glands contain fat and proteins and when they come in contact with bacteria on the skins surface they create body odor.
In addition to this, the capillary flow of blood increases, thus enabling the body to burn more calories, when the skin reddens during hot weather, it is a direct result of this action. Adversely, when the body is exposed to cold temperatures, the opposite happens, the blood capillaries contract to preserve body heat, so the skin does not get too cool, thus the skin becomes very pale to the eye. When cold the skeletal muscles may involuntarily contract by the process known as shivering, this is explained in more detail in the section
The skins function is to act as a barrier; this protects the body from microbes and viruses entering the body. The skin also prevents fluid loss from the body and helps to regulate body temperature. The kidneys filter the toxins in the blood, regulate water levels within the body and also help excrete waste. The liver helps with the breakdown of toxic substances and also carbohydrates. The hypothalamus in the brain is what controls all the responses to the changes in the body’s internal environment.