Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

alevel PE > diet and nutrition > Flashcards

diet and nutrition Flashcards

1
Q

what are carbohydrates used for?

A

energy production, cell division, active transport and formation of molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

where are carbohydrates stored?

A

carbohydrates are stored in the liver and muscle cells in the form of glycogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what happens to the glycogen that carbohydrates are stored in?

A

the glycogen is then broken down into glucose, where it is a usable energy that provides the body with fuel for aerobic and anaerobic excercise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is a simple carbohydrate, and what are examples?

A

they contain one or two sugars
1. fructose is found in fruits
2. lactose is found in milk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is a monosaccharide?

A

a carbohydrate that contains one sugar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are complex carbohydrates and what are examples?

A

they contain three or more sugars
1. beans
2. lentils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is a polysaccharide?

A

a carbohydrate that contains three or more sugars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is protein needed for?

A

essential for growth and repair of tissues and cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are proteins broken down into and what are they used for?

A

amino acids
the building blocks for muscle tissue, hemoglobin, collagen and enzymes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is fat used for?

A

help the body to absorb certain vitamins. they can also be used for aerobic respiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are the two types of fats?

A

saturated
unsaturated (healthier form of fat e.g. nuts)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are micronutrients used for?

A

help provide the building blocks for cell recognition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what do micronutrients consist of?

A

vitamins and minerals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

why are minerals important?

A

-development of bones and teeth
-breakdown of food into usable forms of energy
-effective nerve transmissions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the two types of vitamins?

A
  1. fat soluble
  2. water soluble
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are fat soluble vitamins?

A

they can be stored in the body (eggs, veg oils)
vitamins A, D, E, K

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what are water soluble vitamins?

A

cannot be stored in the body and so require regular intake (fruits and veg)
vitamins C, B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the importance of water?

A

helps with temperature regulation through perspiration and transportation of vitamins and minerals.
essential for transporting oxygen to working muscles and tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is fibre used for?

A

aids with health and function of intestines, helps with the passage of foods through the intestines allowing for efficient absorption. also useful in regulating the levels of cholesterol in the blood and the prevention of obesity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is the eatwell plate?

A

the eatwell plate outlines the relative percentages of each food category that will constitute a healthy balanced diet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

how many calories do men need daily?

A

2,500 kcals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

how many calories do women need daily?

A

1,900- 2000 kcals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what is the definition of basic metabolic rate?

A

the lowest rate of energy expenditure needed to sustain the body’s essential physiological functions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what is the definition of resting metabolic rate?

A

the lowest rate of energy expenditure needed to sustain the body’s essential physiological functions, NOT including sleep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what is the definition of energy expenditure?

A

the sum of basic metabolic rate, the thermic effect of food and the energy expended through physical activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what is the definition of energy?

A

ability to perform work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is the definition of physical activity energy expenditure?

A

total number of calories required to perform daily tasks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what is the metabolic equivalent value?

A

ratio of performers working metabolic rate to their resting metabolic rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what is the thermic effect?

A

energy used in the process eating, absorbing and using foods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is an energy balance?

A

refers to the difference between the total energy consumed in the daily diet and the total energy expenditure from your basal metabolic rate and any additional activities undertaken

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what is the definition of ergogenic aids?

A

any substance or treatment that either directly improves physiological variables associated with exercise performance or removes subjective restraints that may limit physiological capacity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what is WADA?

A

world antidoping association

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what are pharmacological aids?

A

taken to increase the levels of hormones or neural transmitters naturally produced in the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

what are the three examples of pharmacological aids, and what are there WADA status’?

A

anabolic steroids= illegal
erythropoietin= illegal
human growth hormone= illegal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

what are anabolic steroids used for?

A

they mimic the effects of testosterone

36
Q

what are the advantages of anabolic steroids?

A
  • increased muscle mass
  • increased speed of recovery
  • increased intensity and duration of training
37
Q

what are the disadvantages of anabolic steroids?

A
  • irritability, aggression and mood swings
  • liver damage and potential heart failure
  • acne and hormonal disturbances
38
Q

what athletes use anabolic steroids?

A

weightlifters and rugby players

39
Q

what are EPO’s used for?

A

can be supplemented to increase red blood cell production

40
Q

what are the advantages of taking EPO?

A
  • increased red blood cell count and hemoglobin count
  • increased oxygen transport and aerobic capacity
  • increased intensity and duration of performance before fatigue
41
Q

what are the disadvantages of EPO?

A
  • increased blood viscosity
  • decreased cardiac output
    -increased risk of blood clots and heart failure
  • decreased natural production of EPO
42
Q

what athletes use EPO?

A

endurance athletes

43
Q

what is HGH used for?

A

synthetic drug mimicking the hormone secreted by the pituitary gland

44
Q

what are the positives of taking HGH?

A
  • increased muscle mass and strength
  • increased blood glucose levels
  • increased speed of recovery
  • increased intensity and duration of training
45
Q

what are the disadvantages of HGH?

A
  • abnormal bone and muscle development
  • enlargement of vital organs, leads to multi organ failure
  • increased risk of certain cancers and diabetes
46
Q

what athletes use HGH?

A

anaerobic athletes
e.g. sprinters

47
Q

why are physiological aids taken?

A

to increase the rate and adaptation by the body to increase performance

48
Q

what are the three types of physiological aids, and what are their WADA status?

A
  1. blood doping= illegal
  2. intermittent hypoxic training= legal#
  3. cooling aids= legal
49
Q

what is blood doping?

A

when a volume of blood is removed from the athlete and the red blood cells are frozen around 4 weeks prior to the event. as a result the body naturally replenishes lost blood and 2 hours before an event, the extracted red blood cells are reinjected into the blood

50
Q

what are the positives of blood doping?

A
  • increased red blood cell count
  • increased oxygen transportation and aerobic capacity
  • increased intensity and duration of performance before fatigue
51
Q

what are the negatives of blood doping?

A
  • increased blood viscosity
  • decreased cardiac output
  • increased risk of blood clotting and heart failure
  • risk of transmission reactions and infections (HIV)
52
Q

what is intermittent hypoxic training?

A

when athletes live at sea level but train under hypoxic (low ppo2) conditions

53
Q

what are the positives of intermittent hypoxic training?

A
  • acclimatisation for events at altitude
  • increased red blood cell, haemoglobin and oxygen carrying capacity
    -increased intensity and duration before fatigue
54
Q

what are the negatives of intermittent hypoxic training?

A
  • any benefits quickly lost when IHT stops
  • may disrupt training patterns
  • dehydration
  • decrease immune function
55
Q

why are cooling aids used pre-event?

A

to reduce core body temperature in a bid to sustain intensity and speed whilst reducing thermal strain and the cardiovascular drift

56
Q

why are cooling aids used post-event?

A

e.g. ice baths can be used to speed up recovery by reducing exercise induced muscle damage, which can cause vasoconstriction of blood vessels reducing blood flow

57
Q

what are the positives of using cooling aids?

A
  • reduced core body temperature
  • decreased sweating, dehydration and early fatigue
  • decreased injury pain and swelling
  • increased speed of recovery and repair
58
Q

what are the negatives of using cooling aids?

A
  • ice burns
  • hide or complicate injuries
  • difficult to perceive exercise intensity
59
Q

what are the examples of nutritional aids, and what are their WADA status?

A
  1. amount, composition and timings of meals= legal
  2. glycogen loading= legal
  3. hydration= legal
  4. caffeine= legal
  5. bicarbonate= legal
  6. nitrate= legal
  7. creatine= legal
60
Q

what should endurance athletes do in relation to amount, composition and timings of meals pre-event?

A

meal 3-4 hours before an event, would eat slow digesting carb meals, 1-2 hours before event they would eat smaller, fast digesting carb meal to top up glycogen stores and maintain blood glucose levels

61
Q

what should endurance athletes do in relation to amount, composition and timings of meals during event?

A

recommended for athletes that compete longer than an hour to consume regular small amount of fast digesting carbs to maintain blood glucose levels and top up glycogen stores

62
Q

what should endurance athletes do in relation to amount, composition and timings of meals post event?

A

rapid post exercise recovery is aided by 1:1.5 kg of carbs per hour. should be consumed within 30 minutes of finishing event and repeated at 2 hour intervals for up to 6 hours post exercise

63
Q

what should strength trainers do in relation to amount, composition, and timings of meals overall?

A
  • 5-6 meals per day every few hours
  • up to 30% lean protein to enhance muscle building and repair
  • complex carbs to release energy slowly, control blood sugar levels and minimise the storage of fat
64
Q

what should strength trainers do in relation to amount, composition, and timings of meals pre training?

A

30-60 min before, small meat eaten with equal quantities of fast digesting carbs and proteins

65
Q

what should strength trainers do in relation to amount, composition and timings of meals post event?

A

within two hours of finishing training a meal consisting of fast digesting carbs and proteins to replace lost glycogen and satisfy for higher need for protein to boost protein synthesis and muscle and strength gains

66
Q

what are the four phases of glycogen/carb loading?

A

1st phase- day one: glycogen, depleting bout of endurance exercise
2nd phase- day two and three: high fat/ high protein diet
3rd phase- day four: glycogen, depleting bout of endurance exercise
4th phase- day five to seven: high carb diet, whilst training is reduced

67
Q

what are the positives of glycogen/ carb loading?

A
  • increased glycogen stores
  • increased endurance capacity
  • delays fatigue
  • increased time to exhaustion by up to 30%
68
Q

what are the negatives of glycogen/ carb loading?

A
  • poor recovery rates in the depletion phase
  • affects mental preparation pre competition
  • increased risk of injury
  • lethargy and irritability in depletion phase
69
Q

losing 2% of body weight through sweat can cause up to 20% decrease in performance due to?

A
  • decreased heart regulation and increased temperature
  • increased heart rate
  • increased fatigue
  • increased blood viscosity
  • decreased cognitive function and skill level
70
Q

what are the three solutions that can be taken to re hydrate athletes?

A
  • hypotonic solutions
  • isotonic solutions
  • hypertonic solutions
71
Q

what are hypotonic solutions, and what athletes use them?

A

drinks that contain lower concentrations of glucose
-used by athletes that need hydration without energy e.g. gymnasts

72
Q

what are isotonic solutions, and what athletes use them?

A

drinks that contain equal concentrations of glucose and in the blood stream
-used by middle-long distance runners and games players

73
Q

what are hypertonic solutions, and what athletes use them?

A

drinks that contain higher amounts of glucose than the blood stream
-used by ultra-distance athletes but should be used with isotonic solutions to replace fluid

74
Q

where is creatine stored in the body?

A

stored in the muscle tissues as phosphocreatine and used to fuel very high intensity energy production

75
Q

what are the positives of creatine supplementation?

A
  • increased PC stores
  • increased fuel for very high intensity energy production
  • increased intensity and duration of training
76
Q

what are the negatives of creatine supplementation?

A
  • increased weight gain
  • muscle cramps
  • gastrointestinal problems
77
Q

what are the positives of taking caffeine?

A
  • increased nervous stimulation
  • increased focus and concentration
  • preservation of muscle glycogen
    increased endurance performance
78
Q

what are the negatives of taking caffeine?

A
  • diuretic effect, leading to dehydration
  • anxiety
  • gastrointestinal problems
79
Q

why do athletes take bicarbonate?

A

helps prevent excessive rise in acidity in the blood stream during exercise

80
Q

what are the positives of taking bicarbonate?

A
  • increased buffering capacity
  • increased tolerance to lactic acid, delaying OBLA
  • increased intensity and duration of performance
81
Q

what are the negatives of taking bicarbonate?

A
  • possible gastrointestinal problems
  • unpleasant taste causing nausea
82
Q

what athletes take bicarbonate?

A

anaerobic athletes, that produce high levels of lactic acid

83
Q

what type of athletes take nitrate and how does it benefit them?

A

endurance runners, as it helps dilate blood vessels

84
Q

when do athletes begin taking nitrate?

A

5-6 days before performance

85
Q

what are the positives of taking nitrate?

A
  • reduced blood pressure
  • increased blood flow
  • increased intensity of performance
  • delays fatigue
86
Q

what are the negatives of taking nitrate?

A
  • headaches, dizziness
  • long term effects on health unclear
  • possible cancer risk

alevel PE (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions