Homeostatic Mechanisms That Maintain Body Fluid Levels

4192 words 17 pages
Body fluids are maintained at a constant level by several homeostatic mechanisms:

Osmosis- is the diffusion of water through a selectively permeable membrane known as a plasma membrane. Water is highly polar it is repelled by the lipid core (nonpolar) of the plasma membrane but can easily pass through the aquaporins created by the proteins in the membrane, so osmosis is happening all the time as water moves into and out of cells.
Diffusion- Is where ions move away from an area where they are more concentrated to an area where they are less concentrated, all ions contain kinetic energy and as they move around randomly at high speeds they collide forcing them to change direction with each collision
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Ref: Marieb, Elaine, N, Pearsons, International, Human Anatomy and Physiology, Edition, 9, pg 164

The burns were subsequently grafted with a split skin graft. What are the layers of the skin that are used for the graft?
A split skin graft is taken by shaving the surface layers (epidermis and a variable thickness of dermis) of the skin with a large knife called a dermatome, the shaved piece of skin is then applied to the wound, this type of skin graft is often taken from the leg however Mary will have to obtain the graft from her abdomen or lower back.
Ref: http://www.dermnetnz.org/procedures/graft.html

Activity 3.1
Musculoskeletal System

Dorothy Nelson is 76 years old, was admitted to the emergency department after a fall in her bathroom. She has a painful left hip, her left leg was externally rotated and shortened. She was commenced on IV fluids and medical management. Her x-ray showed a displaced left fractured neck of femur. She has previously been diagnosed as having osteoporosis.

You are the nurse allocated to care for Mrs Nelson, 3 days post-surgery to repair the fracture. List the types of documentation you would expect to be in her patient record (chart) that would assist you to care for her during your shift.
Admission Form
Care plan
Medical history/allergies
Medication chart
Observation chart
Progress notes
Fluid balance chart
Bowel chart
Neurovascular chart


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