Which feedback mechanisms are associated with the chemical control of ventilation during exercise?

Increases in blood acidity levels

Which are involved in neural control of ventilation? Options: Sinoatrial and atrioventricular nodes, Lung stretch receptors and chemoreceptors, Adrenaline and breathing rate, Diaphragm and accessory muscles

Lung stretch receptors and chemoreceptors

Which statement is correct: At the alveoli oxygen moves from a high pp in the alveoli to a low pp in the capillaries, At the alveoli oxygen moves from a low pp in the alveoli to a high pp in the capillaries, At the alveoli carbon dioxide moves from a high pp in the alveoli to a low pp in the capillaries, At the alveoli carbon dioxide isn't exchanged?

At the alveoli oxygen moves from a high pp in the alveoli to a low pp in the capillaries.

How does an increased erythrocyte level benefit an athlete?

By increasing the oxygen carrying capacity of the blood

Which are involved in the regulation of heart rate? (multiple answers) SA Node, Autonomic nervous system, Adrenaline, veins

SA Node, Autonomic nervous system, Adrenaline

Which of the following correctly describes the sequence of excitation of heart muscle? Options: AV node → bundle of HIS SA node → AV node → bundle of HIS bundle of HIS → SA node → AV node AV node → SA node → bundle of HIS

SA node → AV node → bundle of HIS

Which of the following best explains the cardiovascular drift?

During prolonged exercise there is a lower venous return to the heart and a small decrease in blood volume due to sweating. Therefore the heart rate increases to maintain cardiac output.

Where does blood exert the force measured as systolic blood pressure?

On the arterial walls during ventricular contraction

What is transported in the pulmonary artery?

Deoxygenated blood to the lungs

What does diastolic blood pressure measure?

The force exerted by blood on arterial walls during ventricular relaxation.

How does the heart meet the demand for oxygenated blood during physical activity? Options: Increasing cardiac output, decreasing stroke volume, increasing heart rate; Decreasing cardiac output, decreasing stroke volume, decreasing heart rate; Increasing cardiac output, increasing stroke volume, increasing heart rate; Decreasing cardiac output, increasing stroke volume, increasing heart rate

Increasing cardiac output, increasing stroke volume, increasing heart rate

What happens to someone's blood pressure during dynamic exercise?

Systolic blood pressure increases and diastolic blood pressure remains constant.

Which demonstrates how blood is redistributed to the working muscles during exercise? (select 2) Options: precapillary sphincters of the arterioles of the working muscles vasodilate, pracapillary sphincters of the arterioles of the non-vital organs vasoconstrict, precapillary sphincters of the arterioles of the working muscles vasoconstrict, pracapillary sphincters of the arterioles of the non-vital organs vasodilate

pracapillary sphincters of the arterioles of the non-vital organs vasoconstrict

What is an adaptation of endurance exercise training? Options: increased HR, decrease in SV, Decrease in arterio-venous oxygen difference, increase in capillarisation around skeletal muscles

increase in capillarisation around skeletal muscles

Which of the following is correct for an athlete who is exercising at a steady pace on flat terrain for a prolonged period of time? Stroke volume gradually decreases and submaximal heart rate gradually increases, Cardiac output gradually decreases as they get used to the exercise load, Stroke volume and submaximal heart rate gradually decrease, Stroke volume and submaximal heart rate gradually increase

Stroke volume gradually decreases and submaximal heart rate gradually increases

Which defines maximal oxygen consumption?

Maximum volume of oxygen inhaled and used per minute

Which statement is false for the average population: Trained athletes usually have a higher VO2max than untrained individuals, Elderly usually have a lower VO2max than young adults, Women usually have a higher VO2max than men, People with more muscle have a higher VO2max

Women usually have a higher VO2max than men

IB SEHS Topic 2 - Exercise Physiology Flashcards

Student preview

39 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is vital capacity?

Back

Total lung capacity minus residual volume.

2.

FLASHCARD QUESTION

Front

What are the principal structures of the ventilatory systems?

Back

Nose, trachea, bronchioles, alveoli

3.

FLASHCARD QUESTION

Front

What is the tidal volume?

Back

volume of air breathed in and out in a normal breath

4.

FLASHCARD QUESTION

Front

What is residual volume?

Back

volume of air still contained in the lungs after a maximal exhalation

5.

FLASHCARD QUESTION

Front

Which is a principal structure of the ventilatory system? Options: pulmonary artery, trachea, pulmonary valve, capillary

Back

trachea

6.

FLASHCARD QUESTION

Front

What is inspiratory reserve volume?

Back

additional inspired air over and above the tidal volume

7.

FLASHCARD QUESTION

Front

What is pulmonary ventilation?

Back

Inflow and outflow of air between the atmosphere and the lungs.

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