MGRADES
IB SEHS - Paper 2 Revision UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Describe the need for glucose and oxygen by the brain. [3] - CORRECT ANSWER -
glucose and oxygen are used to make ATP using aerobic respiration ✔
if the blood has low level of glucose or oxygen mental state can be altered
negatively
OR
without glucose or oxygen, the person may experience dizziness or convulsions ✔
glucose storage in the brain is limited ✔
glucose moves rapidly into the brain cells ✔
Using an example, describe how selective attention prevents information overload. [3] -
CORRECT ANSWER - separates the relevant information from the irrelevant/noise
information
OR
only relevant information is passed to the short-term memory ✔
an athlete concentrates on a specific cue or stimulus such as the ball/position of
player and excludes the others such as the other players/cheering crowd ✔
can be improved by learning through past experience and interaction with
long-term memory ✔
operates in the short-term sensory store ✔
Define motor programme. [1] - CORRECT ANSWER - motor programme is a set of
movements stored as a whole in the memory
«regardless of whether feedback is used in their execution»
OR
, MGRADES
consists of an executive programme and subroutines✔
Explain how genetic and environmental factors contribute to improved performance in long
distance runners. [5] - CORRECT ANSWER - Genetic factors:
a combination of height and flexibility allows for the optimal stride length and strength ✔
an athlete with more slow twitch/type I muscle fibres does better in long distance running ✔
an athlete with a higher lung capacity has an advantage in long distance running ✔
mental toughness/resilience enables runners to endure longer practices/training
resulting in improvement in performance ✔
Environmental factors:
training maximizes the likelihood of obtaining a performance level with genetically controlled
ceiling ✔
balanced diet/proper nutrition high in «low glycemic index» carbohydrates are best for
endurance athlete ✔
technological aids «such as timing equipment» can help improve pacing and performance ✔
altitude training can improve endurance performance at sea level ✔
Discuss how the three energy systems contribute to ATP production during an 800-metre run. [6]
- CORRECT ANSWER - During «approximately» the first minute all energy systems will
be working ✔
during an 800m run, energy systems do not respond in a sequential manner ✔
ATP-CP system:
ATP production is from the breakdown of phosphocreatine <anaerobically> during
initial seconds of activity ✔
1 PC = 1 ATP ✔
may contribute at other times of rapid change in energy demand <as long as a
IB SEHS - Paper 2 Revision UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Describe the need for glucose and oxygen by the brain. [3] - CORRECT ANSWER -
glucose and oxygen are used to make ATP using aerobic respiration ✔
if the blood has low level of glucose or oxygen mental state can be altered
negatively
OR
without glucose or oxygen, the person may experience dizziness or convulsions ✔
glucose storage in the brain is limited ✔
glucose moves rapidly into the brain cells ✔
Using an example, describe how selective attention prevents information overload. [3] -
CORRECT ANSWER - separates the relevant information from the irrelevant/noise
information
OR
only relevant information is passed to the short-term memory ✔
an athlete concentrates on a specific cue or stimulus such as the ball/position of
player and excludes the others such as the other players/cheering crowd ✔
can be improved by learning through past experience and interaction with
long-term memory ✔
operates in the short-term sensory store ✔
Define motor programme. [1] - CORRECT ANSWER - motor programme is a set of
movements stored as a whole in the memory
«regardless of whether feedback is used in their execution»
OR
, MGRADES
consists of an executive programme and subroutines✔
Explain how genetic and environmental factors contribute to improved performance in long
distance runners. [5] - CORRECT ANSWER - Genetic factors:
a combination of height and flexibility allows for the optimal stride length and strength ✔
an athlete with more slow twitch/type I muscle fibres does better in long distance running ✔
an athlete with a higher lung capacity has an advantage in long distance running ✔
mental toughness/resilience enables runners to endure longer practices/training
resulting in improvement in performance ✔
Environmental factors:
training maximizes the likelihood of obtaining a performance level with genetically controlled
ceiling ✔
balanced diet/proper nutrition high in «low glycemic index» carbohydrates are best for
endurance athlete ✔
technological aids «such as timing equipment» can help improve pacing and performance ✔
altitude training can improve endurance performance at sea level ✔
Discuss how the three energy systems contribute to ATP production during an 800-metre run. [6]
- CORRECT ANSWER - During «approximately» the first minute all energy systems will
be working ✔
during an 800m run, energy systems do not respond in a sequential manner ✔
ATP-CP system:
ATP production is from the breakdown of phosphocreatine <anaerobically> during
initial seconds of activity ✔
1 PC = 1 ATP ✔
may contribute at other times of rapid change in energy demand <as long as a
