Showing posts from 2012

Psychology: Sleeping

Sleep Deprivation / Sleep Loss
- Being prevented from getting the desired or needed amounts of sleep
- Typically causes trembling hands, dropping eyelids, inattention, irritability, staring, increase pain sensitivity and general discomfort (Doran, Van Dongen and Dinges, 2001)
- If you lose just one hour of sleep at night, it can affect your mood, memory, ability to pay attention and even your health (Mass, 1999)

Normal range of sleep
- Majority of us sleep on a 7 to 8 hour per night schedule

Sleep hormone
- A sleep-promoting substance found in the brain and spinal cord

Beta Waves
- Small, fast brain waves associated with being awake and alert

Alpha waves
- Large, slow brain waves associated with relaxation and falling asleep; also occur when you are relaxed and allow your thoughts to drift

Non-REM sleep function
- Increases after physical exertion and may help us recover from body fatigue

REM sleep (Rapid Eye Movement sleep)
- Day-time stress tends to increase REM sleep
- REM sleep totals o…

Psychology: Roles of Genes

The genes uses a chemical alphabet to write instructions for the development of brain and body and the manufacturer or chemicals that affect mental health, learning, emotions, personality traits and everything we do.

What is gene?
Chains of chemicals arranged like rungs on a twisting ladderThere are about 20,000 to 25,000 genes that contain chemical instructions equal to about 300,000 pages of typed instructions (IHGSC, 2004)The chemical instructions program the development of millions of individual parts into a complex body or brain.

Science: Organic Compounds

ProteinMost abundant organic compoundFundamental structural and functional frameworks of the cell’s protoplasmKinds:Structural/Fibrous protein – build and repair body cell tissuesGlobular/Enzymatic protein – biological catalyst in almost every chemical reactionNucleic acidDNA and RNACarbohydratesChief energy sourceBackbone of moleculesWhen combined with protein, they form glycoproteins and proteoglycansClassifications:Monosaccharide – simple sugar which serves as building blocks for more complex forms like glucose, fructose, galactoseDisaccharides – formed by chemical combination of 2 monosaccharides but with removal of water molecules (like maltose, sucrose, lactose)Polysaccharide – series of monosaccharidesStarch – serves as units of glucoseGlycogen – stored carbohydrates found in animalsCellulose – insoluble carbohydrate; abundant in the tough outer wall of plant cellsChitin – exoskeleton of animalsLipidsFats and oilsServed as the highest source of energyActs as insulator protectin…