Dr Gawad Physiology Course Online Exams - Lecture 3 Exam (Parasympathetic Nervous System, Chemical Transmitters Exam)

15 Questions | Total Attempts: 461

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Dr Gawad Physiology Course Online Exams - Lecture 3 Exam (Parasympathetic Nervous System, Chemical Transmitters Exam)

15 MCQs (Only one correct answer) Each MCQ: 1 mark, Total mark: 15 (you will get the results immediately with correction by the web) Allowed time: 20 min Good Luck dr Gawad


Questions and Answers
  • 1. 
    About the vagus nerve, all the following is true except:
    • A. 

      (A) It contains afferent and efferent fibres.

    • B. 

      (B) It contains parasympathetic pregang fibres.

    • C. 

      (C) It produces micturition.

    • D. 

      (D) It causes increased peristaltic movement of the intestinal wall.

  • 2. 
    Stimulation of the pelvic nerve (sacral autonomic) produces :
    • A. 

      (A) Relaxation of the wall of rectum and contraction of the internal anal sphincter.

    • B. 

      (B) V.C. of the blood vessels in the external genitalia causing erection of penis.

    • C. 

      (C) Contraction of the bladder wall and relaxation of the internal urethral sphincter.

    • D. 

      (D) Contraction of smooth muscles in the male sexual passages causing ejaculation.

    • E. 

      (E) Relaxation of the external urethral and anal sphincters.

  • 3. 
    Concerning the pelvic nerve, all the following is true except:
    • A. 

      (A) It is the nerve of erection (= nervus erigenes).

    • B. 

      (B) It is motor to the urinary bladder and distal half of the large intestine.

    • C. 

      (C) It is inhibitory to both the internal anal and urethral sphincters.

    • D. 

      (D) It has no postganglionic nerve fibres.

  • 4. 
    The parasympathetic nerves :
    • A. 

      (A) Are important in emergency conditions.

    • B. 

      (B) Play important functions in the skin and skeletal muscles.

    • C. 

      (C) Tend to have longer postganglionic fibres than pregang fibres.

    • D. 

      (D) Are catabolic in their actions.

    • E. 

      (E) Mainly exert opposite effects to those of the sympathetic nerves.

  • 5. 
    An injury to the first 4 sacral segments of the spinal cord produces :
    • A. 

      (A) Hyperglycaemia.

    • B. 

      (B) V.D. in the cutaneous blood vessels.

    • C. 

      (C) Disturbance of sweat secretion.

    • D. 

      (D) Lack of erection of the penis in males and clitoris in females.

    • E. 

      (E) Relaxation of the internal anal and urethral sphincters.

  • 6. 
    The functions of Parasympathetic innervations to the salivary glands is:
    • A. 

      (A) V. C. and secretion.

    • B. 

      (B) V.D. and secretion.

    • C. 

      (C) V.D. and inhibition of secretion.

    • D. 

      (D) Secretion of scanty viscous saliva.

  • 7. 
    Which of the following may be produced by parasympathetic stimulation:
    • A. 

      (A) Acceleration of the heart.

    • B. 

      (B) Relaxation of the GIT wall

    • C. 

      (C) V.D. of coronary artery.

    • D. 

      (D) Dilatation of the pupil.

    • E. 

      (E) Contraction of the urinary bladder wall.

  • 8. 
    About acetylcholine, all the following is true except:
    • A. 

      (A) It is synthesized & released by some sympath postgang nerve fibres.

    • B. 

      (B) It is the chemical transmitter released by all pregang nerve fibres.

    • C. 

      (C) It is not related to accommodation

    • D. 

      (D) It is liberated by all parasympathetic postganglionic nerve fibres.

  • 9. 
    The nicotine-like action of acetylcholine is present in :
    • A. 

      (A) All preganglionic nerve endings.

    • B. 

      (B) The sympathetic postganglionic supply to the blood vessels in skeletal muscles.

    • C. 

      (C) The parasympathetic postganglionic supply to the heart.

    • D. 

      (D) The sympathetic postganglionic supply to the sweat glands.

    • E. 

      (E) The parasympathetic postganglionic supply to the GIT.

  • 10. 
    The alpha adrenergic receptors :
    • A. 

      (A) Are not stimulated by epinephrine.

    • B. 

      (B) When stimulated they reduce the gastrointestinal motility.

    • C. 

      (C) Are blocked by propranolol.

    • D. 

      (D) increase heart rate.

  • 11. 
    A drug which blocks the beta adrenergic receptors causes :
    • A. 

      (A) Dilatation of the bronchial muscle.

    • B. 

      (B) Relaxation of the sphincters in the alimentary canal.

    • C. 

      (C) Fall in the cardiac output.

    • D. 

      (D) None of the above

  • 12. 
    The alpha adrenergic receptors mediate all the following except :
    • A. 

      (A) Vasoconstriction.

    • B. 

      (B) Pupil dilatation.

    • C. 

      (C) Spleen contraction.

    • D. 

      (D) Relaxation of intestinal wall.

    • E. 

      (E) increased cardiac activity.

  • 13. 
    Which of the following is considered as a muscarinic like action
    • A. 

      Stimulation of sympathetic to cardiac muscle

    • B. 

      Stimulation of somatic nerve to skeletal muscle

    • C. 

      Release of adrenaline and nor adrenaline from adrenal medulla

    • D. 

      Urination

  • 14. 
    Which of the following is considered as a muscarinic like action
    • A. 

      Decreased heart rate

    • B. 

      Urine retension

    • C. 

      Ejaculation

    • D. 

      Bronchodilatation

  • 15. 
    Which of the following is considered as a nicotinic like action
    • A. 

      Sweat gland secretion

    • B. 

      Skeletal muscle blood vessel vasodilatation

    • C. 

      Involuntary contration of skeletal muscle

    • D. 

      Salivation

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