Human physiology worksheet with answers

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

1. AAuditory tube
2. BSemicircular canals
3. CTympanic membrane
4. DCochlea

What is stroke volume?

1. AThe volume of blood pumped by the heart per minute
2. BThe volume of blood ejected by a ventricle in one beat
3. CThe volume of blood in a ventricle at the end of filling
4. DThe volume of blood left in a ventricle after contraction

What is the normal resting breathing rate of a healthy adult?

1. AAbout 25 to 35 breaths per minute
2. BAbout 12 to 20 breaths per minute
3. CAbout 4 to 8 breaths per minute
4. DAbout 40 to 60 breaths per minute

What does the QRS complex on an ECG represent?

1. AVentricular depolarisation
2. BVentricular repolarisation
3. CAtrial depolarisation
4. DAtrial repolarisation

What causes the first heart sound (S1)?

1. AClosure of the aortic and pulmonary valves
2. BOpening of the aortic valve
3. CBlood filling the atria
4. DClosure of the mitral and tricuspid valves

Which cells in the stomach secrete hydrochloric acid?

1. AParietal cells
2. BG cells
3. CGoblet cells
4. DChief cells

Which substance's clearance is used as the gold standard to measure glomerular filtration rate?

1. AInulin
2. BUrea
3. CCreatinine
4. DGlucose

In the renin–angiotensin–aldosterone system, where is angiotensin I mainly converted to angiotensin II?

1. AIn the liver
2. BIn the lungs
3. CIn the adrenal cortex
4. DIn the kidneys' juxtaglomerular cells