21.1 Select the tissue that is most sensitive to oxytocin:
A. Myometrium
B. Myoepithelium of mammary alveoli
C. Vascular smooth muscle
D. Renal collecting ducts
21.2 Actions of oxytocin include the following except:
A. Vasoconstriction
B. Increased water reabsorption in renal collecting ducts
C. Contraction of mammary myoepithelium
D. Release of prostaglandins from endometrium
21.3 Oxytocin is essential for:
A. Initiation of labour
B. Formation of milk
C. Milk ejection reflex
D. Both ‘A’ and ‘C’ are correct
21.4 Oxytocin is preferred over ergometrine for augmenting labour because:
A. It has brief and titratable action
B. It is less likely to cause foetal anoxia
C. It is less likely to impede foetal descent
D. All of the above
21.5 The drug of choice for controlling postpartum haemorrhage is:
A. Oxytocin
B. Methylergometrine
C. Dihydroergotamine
D. Prostaglandin E2
21.6 Ergometrine is contraindicated in the following conditions except:
A. Multiparity
B. Toxaemia of pregnancy
C. Pelvic sepsis
D. Peripheral vascular disease
21.7 Ergometrine stops postpartum haemorrhage by:
A. Causing vasoconstriction of uterine arteries
B. Increasing tone of uterine muscle
C. Promoting coagulation
D. Inducing platelet aggregation
21.8 Indications of ergometrine include the following except:
A. Postpartum haemorrhage
B. Inadequate uterine involution
C. Uterine inertia during labour
D. Uterine atony after cesarean section
21.9 Select the drug that has been used to suppress labour:
A. Atropine
B. Ritodrine
C. Prostaglandin E2
D. Progesterone
21.10 The adrenergic tocolytic preferred for arresting labour is:
A. Ritodrine
B. Isoprenaline
C. Salbutamol
D. Terbutaline
21.11 Use of ritodrine to arrest premature labour can cause the following complications except:
A. Tachycardia
B. Fall in blood pressure
C. Hypoglycaemia
D. Pulmonary edema
21.12 Which of the following tocolytics used for suppressing labour is most likely to compromise placental perfusion:
A. Salbutamol
B. Ethyl alcohol
C. Magnesium sulfate
D. Nifedipine
Ans:
21.1 B 21.2 A 21.3 C 21.4 D 21.5 B 21.6 A 21.7 B 21.8 C 21.9 B 21.10 A 21.11 C 21.12 D