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

15 Questions | By Gawadphysiology | Last updated: Mar 21, 2022 | Total Attempts: 497

Questions

Settings

Create your own Quiz

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

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