Human physiology worksheet with answers

In which direction does oxygen move during gas exchange in the lungs?

1. AFrom the blood into the alveoli
2. BFrom the pleura into the blood
3. CFrom the alveoli into the blood
4. DFrom the blood into the bronchi

Which mineral is an essential part of haemoglobin?

1. AIron
2. BCalcium
3. CIodine
4. DZinc

Which hormones are the main regulators of the body's basal metabolic rate?

1. AInsulin and glucagon
2. BThyroid hormones (T3 and T4)
3. COestrogen and progesterone (ovarian steroids)
4. DMelatonin and serotonin

Where does the final activation step of vitamin D (1-alpha hydroxylation) take place?

1. ALiver
2. BSmall intestine
3. CSkin
4. DKidney

Which ABO blood group has both anti-A and anti-B antibodies in the plasma?

1. AGroup AB
2. BGroup A
3. CGroup O
4. DGroup B

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

At the start of a fever, a patient shivers and feels cold even though body temperature is rising. Why?

1. AThe body has lost its ability to produce heat
2. BThe thermoreceptors in the skin are destroyed
3. CSweating has already cooled the body too much
4. DPyrogens raise the hypothalamic set point above the current body temperature

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

1. AMetabolic acidosis
2. BRespiratory acidosis
3. CRespiratory alkalosis
4. DMetabolic alkalosis