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fizjologia mcq 1.docx - 1 The delicit of vitamin A causes...

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1. The delicit of vitamin A causes the disorder of twilight vision. What cells is the photoreceptor function typical for? a) Rod neurosensory cells b) Bipolar neurons c) Horizontal neurocytes d) Conic neurosensory cells e) Ganglionic nerve cells 2. When students pass an exam, they often complain of having „dry mouth”. The mechanism underlying the development of this condition is the activation of the following processes: a) Conditioned sympathetic b) Unconditioned parasympathetic c) Unconditioned sympathetic d) Unconditioned peripheral e) Conditioned parasympathetic 3. Experimental stimulation of the peripheral segment of the vagus nerve of a cat will result in the following changes: a) Decreased heart rate b) Increased heart rate c) Dilated pupils d) Increased respiratory rate e) Bronchiectasis 4. During exacerbation of peptic gastric ulcer disease a patient complains of heart pain. What vegetative reflex can cause these painful sensations? a) Viscerovisceral reflex b) Visceromotor reflex c) Dermatovisceral reflex d) Motor visceral reflex e) Viscerodermal reflex 5. In the course of an experiment researchers stimulate a branch of the sympathetic nerve that innervates heart. What alterations of cardiac activity should be registered? a) Increase in heart rate and heart force B. b) Decrease in heart force c) Increase in heart rate d) Increase in heart force e) Increase in arterial pressure
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6. A person found oneself in an emotionally straining situation. As the result the blood adrenaline level has risen, therefore increasing the strength of cardiac contractions. In what way does adrenaline increase the strength of cardiac contractions? a) Activates cardiac β-adrenergic receptors b) Activates vascular baroreceptors c) Decreases tone of vagus nerves d) Activates peripheral chemoreceptors e) Decreases excitability of pacemaker cells 7. In dental practice atropine sulfate is used to decrease salivation. This drug belongs to the following group: a) Muscarinic antagonists b) α-adrenergic agonists c) β-adrenoceptor antagonists d) Ganglionic blockers e) Muscle relaxants 8. Tooth temperature increases during its preparation due to dental borer friction, which may cause painful sensations. What is the threshold of teeth thermal sensitivity? a) 51-60 0 С b) 41-50 0С c) 10-20 0С d) 21-30 0С e) 31-40 0С 9. An oculist has detected increased time of darkness adaptation of a patient’s eye . What vitamin deficiency can cause such symptom? a) А b) Е c) С d) К e) D 10. In the experiment, the permeability of cell membrane for potassium ions has been increased . What changes can be expected in the membrane state? a) Hyper polarization b) Action potential c) Depolarization d) Local response e) There will be no changes
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11. Microelectrode technique allowed to register a potential following 'all-or-none' law and being able of undecremental spreading . Specify this potential: a) Action potential b) Inhibitory postsynaptic potential c) Rest potential d) Receptor potential e) Excitatory postsynaptic potential 12. A patient complains of decreased ability to produce
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