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
- 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
Questions: 11 | Attempts: 10810 | Last updated: Mar 2, 2021
-
Sample QuestionWhat is the Pons'sprimary function?
Questions: 38 | Attempts: 6376 | Last updated: Jun 17, 2020
-
Sample QuestionWhich of the following conditions is most likely to stimulate the secretion of cholecystokinin (CCK) from the duodenal mucosa?
Questions: 64 | Attempts: 4706 | Last updated: Sep 9, 2020
-
Sample QuestionAlong with the nervous system, which other system controls the internal environment. (homeostasis)
Back to top