Lesson 7.4.2
7.4.2 Cardiac output and ventilation control Quiz: Pearson Edexcel Biology, Unit 7
20 questions
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Lesson 7.4.2, Cardiac output and ventilation control: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 7: Run for your Life, written with Revision Ninja.
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The 20 questions
-
What formula correctly calculates cardiac output?
- Blood pressure × resistance
- Stroke volume ÷ heart rate
- Heart rate × stroke volume
- Heart rate ÷ stroke volume
-
What is the volume of blood pumped by one ventricle in a single beat called?
- Ventricular capacity
- Cardiac output
- Stroke volume
- Tidal volume
-
Which region of the brain contains the cardiovascular control centre?
- Corpus callosum
- Cerebellum
- Medulla oblongata
- Cerebrum
-
Which region of the brain contains the ventilation centre that controls breathing rate?
- Cerebellum
- Medulla oblongata
- Thalamus
- Hypothalamus
-
What is the volume of air inhaled or exhaled in a normal resting breath called?
- Tidal volume
- Minute ventilation
- Residual volume
- Vital capacity
-
What is the cardiac output if heart rate is 70 bpm and stroke volume is 70 cm³?
- 140 cm³ per minute
- 4900 cm³ per minute
- 7000 cm³ per minute
- 490 cm³ per minute
-
If stroke volume is 75 cm³ and heart rate is 60 bpm, what is cardiac output in dm³ min⁻¹?
- 4500 dm³ min⁻¹
- 0.45 dm³ min⁻¹
- 4.5 dm³ min⁻¹
- 1.25 dm³ min⁻¹
-
If heart rate doubles and stroke volume increases by 1.5 times, by what factor does cardiac output increase?
- 3 times
- 3.5 times
- 4 times
- 2 times
-
What blood gas change triggers an increased ventilation rate during strenuous exercise?
- Increased oxygen
- Increased nitrogen
- Increased carbon dioxide
- Decreased carbon dioxide
-
Which two factors are multiplied to calculate minute ventilation?
- Vital capacity × heart rate
- Tidal volume × breathing rate
- Residual volume × breathing rate
- Tidal volume × stroke volume
-
Calculate the minute ventilation for a tidal volume of 0.5 dm³ and breathing rate of 15 bpm.
- 7.5 dm³ min⁻¹
- 7.5 dm³
- 0.03 dm³ min⁻¹
- 30.0 dm³ min⁻¹
-
Which nerve pathway carries impulses from the medulla to the SAN to increase heart rate during exercise?
- Vagus nerve
- Parasympathetic nerve
- Motor neurone
- Sympathetic nerve
-
Which hormone released during exercise increases both heart rate and stroke volume?
- Thyroxine
- Insulin
- Adrenaline
- Cortisol
-
Which receptors detect changes in blood carbon dioxide concentration and pH?
- Thermoreceptors
- Baroreceptors
- Proprioceptors
- Chemoreceptors
-
What physical change does an increased stroke volume cause per heart beat?
- More blood pumped
- Higher blood pressure
- Reduced oxygen content
- Faster heart beats
-
Breathing rate drops to 12 bpm while tidal volume rises to 0.8 dm³. What is the new minute ventilation?
- 8.0 dm³ min⁻¹
- 15.0 dm³ min⁻¹
- 9.6 dm³ min⁻¹
- 9.6 dm³
-
Which cardiovascular adjustments increase cardiac output during strenuous exercise?
- Decreased HR and SV
- Increased HR, decreased SV
- Decreased HR, increased SV
- Increased HR and SV
-
Which region of the brain controls both heart rate and ventilation rate?
- Medulla oblongata
- Cerebellum
- Hypothalamus
- Cerebrum
-
Which brain region co-ordinates ventilation rate and cardiac output during exercise?
- Cerebral cortex
- Cerebellum
- Hypothalamus
- Medulla oblongata
-
A heart pumps 5 dm³ min⁻¹ at 80 bpm. What is its stroke volume in cm³?
- 400 cm³
- 62.5 cm³
- 16 cm³
- 625 cm³
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