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6. What controls the heart?

  • A nerve plexus
  • The somatic motor system
  • The autonomic nervous system
  • The central nervous system

7. Which is more susceptible to tissue necrosis?

  • True end arteries
  • Functional end arteries

8. What is the function of the pleural fluid?

  • Provides surface tension and lubrication
  • Keeps alveoli moist
  • Lubrication only
  • Keeps lungs and bronchioles moist

9. At what point does the trachea bifurcate into the bronchi?

  • The level of the fifth rib
  • Just as it enters the mediastinum
  • Above the diaphragm
  • The level of the second rib

10. Which lung generally has more lobes?

  • Right lung
  • Left lung
  • They are both the same size

11. What is systole?

  • Contraction, expelling blood
  • Contraction of ventricles
  • Relaxation, receiving blood
  • Contraction of atria

12. What is the adventitia of the major blood vessels continuous with?

  • Fibrous pericardium
  • Epicardium
  • Sternopericardiac ligament

13. What type of epithelium is found in the bronchii?

  • Ciliated cuboidal epithelia
  • Ciliated stratifed squamous epithelia
  • Ciliated columnar epithelia
  • Ciliated striated epithetlia

14. What is a ventricular diastole?

  • Contraction of the ventricles, forcing blood into the major blood vessels
  • Relaxation of the ventricles, allowing blood in from the atria
  • Relaxation of the ventricles, closing the atrioventricular valves

15. What do the Purkinje fibres stimulate?

  • The sinoatrial node
  • Myocardium of the heart wall
  • The aorta

16. Why are horses obligate nasal breathers?

  • Epiglottis is located above the soft palate, forming an airtight seal between oropharynx and trachea
  • Epiglottis is located below the soft palate, blocking the entrance to the trachea
  • Trachea is located dorsal to oesphagus
  • They're too dumb to breathe through their mouths

17. Where are anastamoses common?

  • Near the heart
  • Around joints
  • Around the lungs
  • The abdominal cavity

18. Which blood vessels has the largest tunica adventitia?

  • Veins
  • Arteries
  • Venules

19. What is found at the base of the heart in a cow?

  • Sternopericardiac ligament
  • Phrenopericardiac ligament

20. What is the correct order of stimulation in a contraction?

  • Sinoatrial node, atrioventricular bundle, atrioventricular node
  • Sinoatrial node, atrioventricular node, His bundle
  • Atrioventricular node, sinoatrial node, atrioventricular bundle