Human physiology worksheet with answers

Where is most of the nutrient absorption in the digestive tract?

1. AStomach
2. BLarge intestine
3. CSmall intestine
4. DOesophagus

What is tidal volume?

1. AThe air left in the lungs after a full exhalation
2. BThe maximum volume of air that can be breathed out after a full breath in
3. CThe total volume of air in the lungs
4. DThe volume of air moved in or out in one normal breath

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

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

According to Poiseuille's law, if the radius of an arteriole halves, its resistance to flow:

1. AHalves
2. BIncreases 4-fold
3. CIncreases about 16-fold
4. DDoubles

During which phase of the cardiac cycle are all four heart valves closed while ventricular pressure rises?

1. ARapid filling
2. BAtrial systole
3. CIsovolumetric contraction
4. DRapid ejection

Why does glucose appear in the urine in uncontrolled diabetes mellitus?

1. AThe collecting duct actively secretes glucose
2. BThe glomerulus stops filtering glucose
3. CThe filtered load exceeds the tubular transport maximum
4. DInsulin is needed for glucose reabsorption in the tubule

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

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

After several days of persistent vomiting of stomach contents, which acid–base disturbance is most likely?

1. AMetabolic alkalosis
2. BMetabolic acidosis
3. CRespiratory acidosis
4. DRespiratory alkalosis