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IB SEHS - Midterm Exam Questions With Correct Answers

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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 goin...

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  • August 16, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • IB SEHS
  • IB SEHS
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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

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