Human physiology worksheet with answers

Which vitamin is needed by the liver to make several clotting factors?

1. AVitamin K
2. BVitamin D
3. CVitamin B12
4. DVitamin C

What does bile do to fats in the small intestine?

1. AAbsorbs them directly into the blood
2. BEmulsifies them into small droplets
3. CBreaks them into amino acids
4. DConverts them into glucose

The systolic blood pressure is the pressure in the arteries:

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

What is the main function of pulmonary surfactant?

1. ATo reduce surface tension in the alveoli
2. BTo carry oxygen across the alveolar wall
3. CTo trap dust in the bronchi
4. DTo kill bacteria in the airways

Where is the heart's natural pacemaker?

1. APurkinje fibres
2. BSinoatrial node
3. CBundle of His
4. DAtrioventricular node

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

1. AMuscle spindle
2. BPacinian corpuscle
3. CGolgi tendon organ
4. DNociceptor

Why does a person with a high spinal cord injury above T1 risk low blood pressure?

1. ARenin release from the kidney stops completely
2. BThe sympathetic outflow to the vessels and heart is cut off
3. CThe vagus nerve is cut, so the heart rate rises
4. DThe phrenic nerve can no longer control the tone of the arteries

Hodgkin and Huxley's classic studies of the ionic basis of the action potential used which preparation?

1. AThe squid giant axon
2. BCultured human cortical neurons
3. CThe frog sciatic nerve–muscle preparation
4. DThe cat spinal cord