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Flashcards in chapter 7 (test 2) Deck (10):

consequences of sleep deficiency (9)

- mental health problems
- decreased performance
- impairment of memory
- increased irritability
- weight gain
- increased risk of metabolic disorders
- increased risk of hypertension, stroke, and heart attack
- increased risk of cancer
- impaired immune system


consequences of daylight savings in relation to accidents and sleep

20% increase in motor vehicle accidents the morning following
- risk of heart attacks goes up 5% in 3 weeks following


reduced sleep effects

people who sleep usually 6 hours of less have a higher risk of having high blood pressure, stroke, and heart disease


how sleep deficiency affects the heart

- raised levels of lipids in blood
- increases risk of heart disease
- hypertension and stroke are associated
- calcification of arteries which leads to blood clots
- cytokine production is affected


other sleep factors that affect heart

- light exposure increases heart rate
- heart rate is higher from 6 am to 12 pm and increases ability for blood clots to form, peak hours for heart attacks and strokes


sleeps affect on metabolism

short or disrupted sleep causes:
- weight gain
- increased fat mass deposition
- obesity
- diabetes
- metabolic disorders
- diabetes


insulin and sleep

- insulin is less effective at lowering blood glucose after sleep restriction and the ability to regulate levels is impaired
- high levels of glucose damage blood vessels, kidney, eye, and nerve function


leptin and ghrelin and sleep

- two hormones secreted from adipose and stomach
- high levels of leptin inhibits food intake (is lowered after loss of sleep)
- high levels of ghrelin stimulate hunger and increase after loss of sleep


sleep and cancer

shift workers have a 50% increased risk of breast and prostate cancer


possible links between sleep and cancer

disruption of immune functioning, exposure to light at night, disturbance of cell cycle rhythms, sleep controlled alterations in hormonal systems