BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
IB SEHS - Midterm Exam Questions With
Correct Answers
Why might a doctor be interested in assessing VO2 in an exercise test? - answer✔✔-VO2 is the
amount of oxygen a person takes in during exercise.
-This might be interesting to assess to a doctor because it helps them understand the oxygen
going to the blood during physical activity.
-It shows how effective the lungs, heart blood flow, and muscles are working with each other.
how does oxygen transfer from blood to muscles? - answer✔✔the concentration of oxygen in the
muscle will be lower in the muscle than in the blood, so the oxygen will transfer to the muscle
through diffusion
Describe the process of breathing and comment on how exercise affects this process. -
answer✔✔-diaphragm pulls downward on the lungs and allows for more room inside the lungs
to take in oxygen from high to low pressure
-after the gas exchange, the diaphragm relaxes, pushing out the carbon dioxide a body has
produced after taking in oxygen to an environment of lower pressure
-exercise is a very important part of this process because it requires more oxygen to be delivered
to the blood.
-the diaphragm is required to contract and relax faster to allow for more oxygen in the body and
bloodstream to the muscles
how does co2 transfer from blood to lungs? - answer✔✔the concentration of CO2 in the alveoli
will be lower than the concentration of CO2 in the blood, so CO2 will diffuse from the blood to
the alveoli to be removed from the body via the lungs
how does co2 transfer from muscles to blood? - answer✔✔because there's a lower concentration
of co2 in the blood stream, co2 will diffuse from the muscle into the blood to be carried to the
alveoli
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
how does oxygen transfer from the lungs to the blood? - answer✔✔the blood has a lower
concentration of oxygen than the alveoli, so oxygen diffuses from the alveoli into the
bloodstream to be taken to the muscles
hemoglobin - answer✔✔pigment that binds oxygen for transport in the blood, found in red blood
cells
hamstring muscles - answer✔✔biceps femoris, semitendinosus, semimembranosus (3)
quadricep muscles - answer✔✔rectus femoris, vastus lateralis, vastus medialis, vastus
intermedius (4)
calf muscles - answer✔✔gastrocnemius (most superficial) and soleus (2)
metacarpals - answer✔✔bone proximal to phalanges
patella - answer✔✔bone anterior to distal end of femur
proximal - answer✔✔closer to the point of attachment
distal - answer✔✔farther from the point of attachment of a limb to the body trunk
anterior - answer✔✔front of the body
posterior - answer✔✔toward the back of the body
scapula - answer✔✔bone posterior to clavicle
tibia - answer✔✔bone distal to femur
4th rib - answer✔✔bone inferior to third rib
inferior - answer✔✔away from the head
superior - answer✔✔up toward the head
fibula - answer✔✔bone lateral to tibia
ulna - answer✔✔bone medial to radius
7th cervical vertebra - answer✔✔bone superior to 1st thoracic vertebrae
Draw and label the 4 chambers of the heart. - answer✔✔
SA node - answer✔✔pacemaker of the heart
AV node - answer✔✔relays electrical impulses from atria into ventricles
bundle of his - answer✔✔a bundle that transmits the impulse from the AV node to the ventricles
causing them to contract
IB SEHS - Midterm Exam Questions With
Correct Answers
Why might a doctor be interested in assessing VO2 in an exercise test? - answer✔✔-VO2 is the
amount of oxygen a person takes in during exercise.
-This might be interesting to assess to a doctor because it helps them understand the oxygen
going to the blood during physical activity.
-It shows how effective the lungs, heart blood flow, and muscles are working with each other.
how does oxygen transfer from blood to muscles? - answer✔✔the concentration of oxygen in the
muscle will be lower in the muscle than in the blood, so the oxygen will transfer to the muscle
through diffusion
Describe the process of breathing and comment on how exercise affects this process. -
answer✔✔-diaphragm pulls downward on the lungs and allows for more room inside the lungs
to take in oxygen from high to low pressure
-after the gas exchange, the diaphragm relaxes, pushing out the carbon dioxide a body has
produced after taking in oxygen to an environment of lower pressure
-exercise is a very important part of this process because it requires more oxygen to be delivered
to the blood.
-the diaphragm is required to contract and relax faster to allow for more oxygen in the body and
bloodstream to the muscles
how does co2 transfer from blood to lungs? - answer✔✔the concentration of CO2 in the alveoli
will be lower than the concentration of CO2 in the blood, so CO2 will diffuse from the blood to
the alveoli to be removed from the body via the lungs
how does co2 transfer from muscles to blood? - answer✔✔because there's a lower concentration
of co2 in the blood stream, co2 will diffuse from the muscle into the blood to be carried to the
alveoli
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
how does oxygen transfer from the lungs to the blood? - answer✔✔the blood has a lower
concentration of oxygen than the alveoli, so oxygen diffuses from the alveoli into the
bloodstream to be taken to the muscles
hemoglobin - answer✔✔pigment that binds oxygen for transport in the blood, found in red blood
cells
hamstring muscles - answer✔✔biceps femoris, semitendinosus, semimembranosus (3)
quadricep muscles - answer✔✔rectus femoris, vastus lateralis, vastus medialis, vastus
intermedius (4)
calf muscles - answer✔✔gastrocnemius (most superficial) and soleus (2)
metacarpals - answer✔✔bone proximal to phalanges
patella - answer✔✔bone anterior to distal end of femur
proximal - answer✔✔closer to the point of attachment
distal - answer✔✔farther from the point of attachment of a limb to the body trunk
anterior - answer✔✔front of the body
posterior - answer✔✔toward the back of the body
scapula - answer✔✔bone posterior to clavicle
tibia - answer✔✔bone distal to femur
4th rib - answer✔✔bone inferior to third rib
inferior - answer✔✔away from the head
superior - answer✔✔up toward the head
fibula - answer✔✔bone lateral to tibia
ulna - answer✔✔bone medial to radius
7th cervical vertebra - answer✔✔bone superior to 1st thoracic vertebrae
Draw and label the 4 chambers of the heart. - answer✔✔
SA node - answer✔✔pacemaker of the heart
AV node - answer✔✔relays electrical impulses from atria into ventricles
bundle of his - answer✔✔a bundle that transmits the impulse from the AV node to the ventricles
causing them to contract
