K⁺ channels close

There is no role of Na⁺ or K⁺ channels during this phase

K⁺ channels open

Na⁺ channels close

Na⁺ channels open

None of the above are correct

The delivery of blood to the systemic circulation and the extraction of blood at the organ (muscle), respectively

The extraction of blood at muscle and the delivery of blood to the systemic circulation, respectively

The delivery of blood to the lung and the extraction of blood at the lung, respectively

The extraction of blood at the kidney and the delivery of blood to the systemic circulation, respectively

A single motor neuron plus all the muscle fibres

it innervates

All of the muscles involved in any movement

A single muscle fibre plus all of the motor neurons that innervate it

None of the answers are correct

All of the motor neurons supplying a single muscle

Aorta

Left ventricle

Right ventricle

Left atrium

Right atrium

Holding breath (valsalva manoeuvre)

Skeletal muscle pumping action

Relaxation of the skeletal muscle

Standing still

None of the answers are correct

Heart rate multiplied by blood pressure

Stroke volume

Stroke volume minus blood pressure

Heart rate

Stroke volume multiplied by heart rate

180 Systolic / 120 Diastolic

120 Systolic / 80 Diastolic

200 Systolic / 100 Diastolic

80 Systolic / 20 Diastolic

140 Systolic / 90 Diastolic

pre load, after load and venous return

mean arterial pressure, diastolic pressure and systolic pressure

heart rate, venous return and blood volume

pre load, after load and inotropy (contractility)

Inotropy, dromotropy and lusitropy

Stroke volume increasing

Vasoconstriction of blood vessels during exercise

None of the answers are right

Vasodilation of blood vessels during exercise

Heart rate increasing

increased inotropy (contraction)

Decreased after load

decreased venous return

decreased end systolic pressure

ventricular hypertrophy