week 5

Question 1

what is the definition of cardiorespiratory endurance

Answer 1

definition= relates directly to lifelong health

-high percentage of children and teenagers have 1 or more risk factors for coronary heart disease.

Question 2

vicious vs positive cycle ( x4 for each)

Answer 2

vicious:
sedentary behaviour> reduced fitness>overweight and obesity> poor health

positive:
physically active> good fitness> decrease fat and increase muscle> good health.

Question 3

what is the main function of the cardiovascular system

Answer 3

internal transport of cells and dissolved materials

Question 4

what is the heart volume change from 6 months, 2 yrs then adulthood

Answer 4

x2 at 6 months
x4 at 2 years
x15 at adulthood

Question 5

what are the 3 x respiratory system structural changes:

Answer 5

1- lung growth increases 20x from birth to adulthood

2- lung growth is relative to growth in stature

3- alveoli increases by 15 x from birth to 8 years

Question 6

what is the 3 x process of the respiratory system

Answer 6

1- transfer oxygen and carbon dioxide

2- gas transfer

3- use of oxygen in cells

Question 7

what is the definition of vo2 max

Answer 7

the maximum amount of oxygen you can use in your body

Question 8

what is economy?

Answer 8

lower economy means at young ages mean that children have less aerobic reserve at set speeds and their reserve increases with age.

Question 9

describe anaerobic power ( x3)

Answer 9

1- short term bursts of energy
2- more use of anaerobic energy
3- power generated anaerobically is considerably higher.

Question 10

what is relative vo2 max and absolute vo2 max and how are they both measured.

Answer 10

relative vo2= the amount of oxygen you inhale relative to your weight.

measured- ml per minute per kg

absolute vo2= total amount of oxygen you can breathe in

measured- litres per min

Question 11

what happens when cardiovascular with ageing

Answer 11

• high prevalence of cv disorders
• the capabilities of the cv system decline with age

Question 12

what is arteriosclerosis

Answer 12

• a thickening and toughening of the arterial walls
• the walls become less tolerant of sudden increase in pressure
• increase heart attack/ stroke

Question 13

ageing and the respiratory system ( x2)

Answer 13

1- can cause airway obstruction
2- elastic tissue deteriorates throughout the body and reduces the lungs ability to deflate and inflate

Question 14

what is the function of the nervous system.

Answer 14

direct immediate responses to stimuli by coordinating the activities of other systems

Question 15

ageing and the nervous system (x5)

Answer 15

• blood flow to brain is decreased= fatty deposits gradually accumulate in the walls of blood vessels reducing rate of arterial blood flow ( atherosclerosis)
• response time is longer
• reaction time is longer
• number of dendrite branches decrease and interconnections decrease.
• myelin sheath detonates so slows nerve messages