section 8 Flashcards
factors affecting food choices
- physiological
- psychological
- environmental
- social
physiological factors affecting food choices
- hunger
- satiety
- metabolism
psychological factors affecting food choices
- habit
- preference
- mood
environmental factors affecting food choices
- availability
- affordability
- convenience
- cooking skills
- access
- education
- advertising
social factors
- social norms
- religion
- family traditions
- cultural traditions
- social status
- peer pressure
hypoglycaemia
low level of glucose in the blood
-brain function might be distrupted leading to unconciousness and eventually brain damage
hyperglycaemia
high lvl of glucose in the blood.
-can lead to diabetes. Can damage blood vessels and organs they supply
mole
unit of measurement. Amount of any chemical substance that contain 6.022x10(23) of individual mole or ions
2 hormones responsible for blood glucose regulation
insulin, glucagon
hormones and organs responsible for it
- pituitary gland - vasopressin
- thyroid gland - thyroxin
- pancrease- glucagon, insulin
- testes- testosteron
- ovaries- oestrogen
- suprarenal gland- cortisol, epinephrine
4 body processes we need hormones for
- digestion
- metabolism
- growth
- reproduction
homeostasis
ability to keep body stable
- temperature
- blood glucose
- ph
- oxygen concentration
negative feedback and example
change in condition cause the body to react in a way that opposes the change and returns condition to optimum level
inhibits the change
body temperature low—> shiering—> body temoerature rise
positive feedback and its example
change from normal condition amplifies the change.
lactation
baby sucks on nipple and signals are send for milk production
where in the body hunger and satiety and thirst is regulated
hypothalamus
what signal is produced in stomach when hungry or full
ghrelin and stretch receptors
hormone from fatty tissues about satiety
leptin
how hormones communicate
by binding to receptors on their target cell
gene
short section of genetic material DNA. Encode the amino acid sequence of particular protein
genetic
study of genes
alleles
1 or several different forms of the same gene.
each person inherits a different combination of alleles that determines unique characteristic
psychological influance on eating behaviour (6)
- visual cue
- sense of smell
- image of food
- thinking about food
- attending social events
- watching tv
classical conditioning bell example
e.g bell can come to trigger salvation in dog if it is repeatedly presented at the time food is given
operant conditioning
form of conditioning in which likelyhood of specific behaviour is increased or decreased through + or - reinformcment each time behaviour is exhibited