Human physiology worksheet with answers

What is normal core body temperature in an adult, approximately?

1. A36 °C
2. B37 °C
3. C38.5 °C
4. D35 °C

Which hormone, made mainly by the kidneys, stimulates red blood cell production?

1. ARenin
2. BThrombopoietin
3. CAldosterone
4. DErythropoietin

Which organ makes most plasma proteins, such as albumin?

1. ABone marrow
2. BKidney
3. CSpleen
4. DLiver

Vital capacity is the sum of which lung volumes?

1. ATidal volume, inspiratory reserve volume and expiratory reserve volume
2. BInspiratory reserve volume and residual volume
3. CTidal volume and residual volume
4. DResidual volume and expiratory reserve volume

How does glucagon raise blood glucose?

1. AIt slows glucose absorption from the gut
2. BIt stimulates glycogen breakdown and gluconeogenesis in the liver
3. CIt stimulates glucose uptake by muscle
4. DIt blocks insulin receptors on fat cells

Where is the heart's natural pacemaker?

1. AAtrioventricular node
2. BSinoatrial node
3. CPurkinje fibres
4. DBundle of His

According to the length–tension relationship, why does a skeletal muscle fibre produce less force when overstretched?

1. AThe muscle runs out of ATP when stretched
2. BActin and myosin overlap less, so fewer cross-bridges form
3. CThe neuromuscular junction stops working
4. DCalcium is no longer released from the sarcoplasmic reticulum when stretched

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

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