TOPIC 7 ~ Parturition and Lactation

Parturition is induced by

• neural mechanism

• endocrine mechanism

• neuroendocrine mechanism

• hormonal mechanism

Signals for parturition originate from

• Both placenta as well as fully developed foetus

• oxytocin released from maternal pituitary

• placenta

• fully developed foetus

Identify the correct sequence in which the various stages of parturition take place

• Shedding of placenta → Dilation of cervix → Delivery of the baby

• Dilation of the cervix → Shedding of placenta → Delivery of the baby

• Dilation of the cervix → Delivery of the baby → Shedding of placenta

• None of the above

Which of the following hormones is responsible for both the milk-ejection reflex and the foetal-ejection reflex?

• Oestrogen

• Prolactin

• Oxytocin

• Relaxin

Which one of the following is not the function of placenta? It

• facilitates supply of oxygen and nutrients to embryo

• secretes oestrogen

• facilitates removal of carbon dioxide and waste material from embryo

• secretes oxytocin during parturition

Colostrum is important for newly born because

• it contains essential antigen

• it contains essential antibodies

• Both (a) and (b)

• it has more nutrients than ordinary milk