Cardio-respiratory system

Which one of these is the correct pathway of air?

• Mouth/nose - trachea - bronchi - bronchioles - alveoli

• mouth/nose - bronchi - bronchioles - trachea - alveoli

• mouth/nose - trachea - bronchioles - bronchi - alveoli

• mouth/nose - bronchioles - bronchi - trachea - alveoli

what is formed when haemoglobin and oxygen combine in the red blood cells?

• ATP

• energy

• oxyyhaemoglobin

• iron

During exercise, the lungs expand more to allow a greater volume of air to be breathed in. Name the two muscles that help the diaphragm and intercostal muscles in this process

• pectoral muscles

• abdominal muscles

• sternocleidomastoid

• obliques

which of these are the structural features of veins? select all correct answers

• thin walls

• thick muscular walls

• large lumen

• contains valves

which one of these describes stroke volume

• the volume of blood in the veins

• the volume of blood pumped by the heart in one minute

• the volume of blood pumped by the heart in one contraction

• the volume of blood within the heart

deoxygenated blood enters the heart through the...

• aorta

• pulmonary vein

• pulmonary artery

• vena cava

oxygenated blood is carried away from the heart by the...

• vena cava

• aorta

• pulmonary vein

• pulmonary artery

vasodilation is when..

• blood vessels of arteries become smaller to restrict blood flow

• blood vessels of arteries become wider to increase blood flow

• blood vessels stay the same size

which of these describes the structure of capillaries? select all correct answers

• very small lumen

• one cell thick

• large surface area

• contains valves

expiratory reserve volume is..

• the volume of air inspired or expired per breath

• the amount of air that can be breathed in after tidal volume

• the amount of air that can be breathed out after tidal volume

• the amount of air left in the lungs after maximal expiration