IB SEHS Topic 2

Which defines maximal oxygen consumption?

• Maximum volume of oxygen inhaled and used per minute

• Maximum volume of air exhaled after a maximum inhalation

• Maximum volume of oxygenated blood ejected per minute

• Maximum volume of oxygen breathed in or out per breath

What describes the effect of exercise on cardiac output?

• Stroke volume increases and heart rate increases

• Stroke volume increases and heart rate decreases

• Stroke volume decreases and heart rate increases

• Stroke volume decreases and heart rate decreases

What is the structure labelled X in the diagram below?

• Bicuspid valve

• Tricuspid valve

• Aortic valve

• Pulmonary valve

Explain the cause of the blood pressure response shown in the graph (3 marks)

Evaluate responses using AI:

OFF

Tags

NGSS.HS-LS1-3

Which term is defined as the volume of air breathed in and out in one breath?

• Pulmonary Ventilation

• Tidal volume

• Vital Capacity

• Residual volume

What is the action of the diaphragm and the alveolar pressure relative to the atmospheric pressure that cause exhalation?

• Diaphragm contracts and the alveolar pressure is higher than the atmospheric pressure

• Diaphragm relaxes and the alveolar pressure is higher than the atmospheric pressure

• Diaphragm contracts and the alveolar pressure is lower than the atmospheric pressure

• Diaphragm relaxes and the alveolar pressure is lower than the atmospheric pressure

What is vital capacity?

• Inspiratory reserve volume plus total lung capacity

• Total lung capacity minus residual volume

• Tidal volume plus inspiratory reserve volume

• Residual volume minus expiratory reserve volume

Which is a principal structure of the ventilatory system?

• capillary

• bronchiole

• haemoglobin

• pulmonary artery

What is residual volume?

• Volume of air in the lungs after maximum inhalation

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

• Volume of air still contained in the lungs after maximal exhalation

• Additional inspired air over and above tidal volume

Which structure is responsible for moistening air entering the ventilatory system?

• Bronchi

• Larynx

• Pharynx

• Nose