Human physiology worksheet with answers

Free printable Human physiology worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy

Which hormone lowers blood glucose?

  1. AInsulin
  2. BCortisol
  3. CGlucagon
  4. DAdrenaline
2.Easy

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

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

Most homeostatic control systems in the body work by:

  1. APositive feedback
  2. BRandom variation
  3. CFeed-forward only
  4. DNegative feedback
4.Medium

Which cells in the stomach secrete hydrochloric acid?

  1. AG cells
  2. BGoblet cells
  3. CChief cells
  4. DParietal cells
5.Medium

Since action potentials are all-or-none, how does a neuron signal a stronger stimulus?

  1. ABy changing the neurotransmitter it releases
  2. BBy making each action potential larger
  3. CBy firing action potentials more often
  4. DBy making each action potential longer
6.Medium

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

  1. ASmall intestine
  2. BSkin
  3. CLiver
  4. DKidney
7.Hard

Why does left ventricular failure cause pulmonary oedema?

  1. APlasma oncotic pressure in the lungs rises sharply
  2. BRaised left atrial pressure increases pulmonary capillary hydrostatic pressure
  3. CThe bronchial arteries become blocked
  4. DThe right ventricle pumps less blood into the lungs
8.Hard

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

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

Answer key

  1. 1. A · Insulin
  2. 2. C · From the alveoli into the blood
  3. 3. D · Negative feedback
  4. 4. D · Parietal cells
  5. 5. C · By firing action potentials more often
  6. 6. D · Kidney
  7. 7. B · Raised left atrial pressure increases pulmonary capillary hydrostatic pressure
  8. 8. A · Actin and myosin overlap less, so fewer cross-bridges form

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