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7 Cards in this Set
- Front
- Back
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Describe what blood pressure is.
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The pressure of blood pressing on the walls of the arteries increases each time the heart pumps more blood.
Systolic pressure is the high pressure 120mmHg (approx) in healthy adults. Diastolic pressure occurs between heart contractions 80 mmHg (approx). B.P is expressed as syst/dia or 120/80 mmHg |
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Discuss the skin repair process
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*Blood from damaged blood vessels fill the wound and begin to clot and form a protective scab.
*The protein fibrogen become insoluble and begins to form a temporary extracellular matrix underneath the protective scab. * An inflammatory response allows extra fluid and repair proteins to collect at the wound site. *Fibroblasts populate the wound with collagen. Epidermal cells divide to cover the wound in a process termed 'granulation'. *The new epidermal cells are shaped to match the surrounding skin, the extra blood vessels are broken down, the scab falls away and the new skin becomes a pink colour as new blood vessels created at the area, supply the new skin with blood. |
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What are the four main fracture types
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* Open fracture = bone protrudes through broken skin.
* Closed fracture=the skin remains intact. * Green stick fracture = This occurs in children as their soft bones bend rather than completely breaking. * Insufficiency fracture = This happens to osteoporatic bone as a result of normal forces acting on the bone. |
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Describe some bodily tissues associated with movement
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* Muscular - contracts to change shape and move any attached structures. It converts chemical energy into kinetic energy.
* Tendon- Attaches muscles to bones. * Nerves - Conveys information to and from the CNS to the rest of the body. * Bones - provide strength and support to the body. |
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What is the extracellular matrix?
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It is material which is external to the cells and forms a support 'mesh' for the cells.
It is made from proteins and forms the bulk of bodily tissues. Proteins in the extracellular matrix are shaped specifically to fulfil the specific function of this tissue. |
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Describe the three types of lever found in the human body.
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Class 1 (e.g head) = The fulcrum is in between the force and the load (see saw)
Class 2 (e.g foot) = the fulcrum is at one end, followed by the load and then the force (wheel barrow) Class 3 (e.g arm) = The fulcrum is at one end followed by the force and then the load (fishing rod) |
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What is a Tissue?
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A tissue is a collection of similar cells grouped together in an organised manner, to fulfil a particular function.
cell - tissue - organ - system |
