Human physiology worksheet with answers

Exchange of gases and nutrients between blood and tissues happens mainly across the walls of:

1. ACapillaries
2. BArterioles
3. CArteries
4. DVeins

The systolic blood pressure is the pressure in the arteries:

1. AWhen the ventricles contract
2. BWhen the ventricles relax
3. CWhen the atria contract
4. DBetween two heartbeats, during diastole

Which structure of the inner ear converts sound vibrations into nerve signals?

1. AAuditory tube
2. BTympanic membrane
3. CSemicircular canals
4. DCochlea

Vital capacity is the sum of which lung volumes?

1. ATidal volume, inspiratory reserve volume and expiratory reserve volume
2. BTidal volume and residual volume
3. CResidual volume and expiratory reserve volume
4. DInspiratory reserve volume and residual volume

Cardiac output equals heart rate multiplied by:

1. AEjection fraction
2. BPeripheral resistance
3. CBlood pressure
4. DStroke volume

Which receptor is stimulated when the patellar tendon is tapped in the knee-jerk reflex?

1. ANociceptor
2. BPacinian corpuscle
3. CMuscle spindle
4. DGolgi tendon organ

What is the main reason the ventricles do not contract at the same moment as the atria?

1. AThe Purkinje fibres conduct slowly
2. BConduction is delayed at the atrioventricular node
3. CThe ventricles have a longer refractory period only
4. DThe SA node fires twice per beat

A healthy person stands up quickly after lying down. Which reflex response prevents fainting?

1. AThe baroreceptor reflex raises heart rate and vasoconstriction
2. BThe chemoreceptor reflex raises breathing rate and arterial oxygen levels
3. CThe Bainbridge reflex lowers heart rate
4. DADH release immediately doubles blood volume