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Assertion : Parturition is induced by ne...

Assertion : Parturition is induced by neural signal in maternal pituitary.
Reason : At the end of gestation period, the maternal pituitary release prolactin which causes uterine contractions.

A

A

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B

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C

D

D

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The correct Answer is:
D
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Assertion: Parturition is induced by neural signal in maternal pituitary. Reason: At the end of gestation period, the maternal pituitary releases prolactin which causes uterine contractions.

(a) In which part of the human female reproductive system do the following events take place? (i) Release of 1st polar body (ii) Release of 2nd polar body (iii) Fertilisation (iv) Implantation (b) From where do signals for parturition originate and what does maternal pituitary release for stimulating uterine contractions for childbirth?

Which of the following endocrine glands is responsible for the release of hormones which cause uterine contractions during childbirth ?

(a) In which part of the human female reproductive system do the following events take place ? I-Release of 1st polar body II-Release of 2nd polar body III-Fertilisation IV-Implanatation (b) From where do signals for parturition originate and what does material pituitary release for stimulating uterine contrations for child birth ?

At the end of the gestation period ;Parturition reflex leading to delivery of the baby in human female is induced by:

Given below are the steps involved in parturition. Arrange them in proper sequence and select the correct option. I. The induction of mild uterine contractions is called foetal ejection reflex. II. Stronger uterine contractions causing the further release of oxytocin. III. Origination of signals from the fully developed foetus and placenta. IV. Release of oxytocin from maternal pituitary V. Expulsion of baby from the birth canal (a) III , IV , I , II , V (b) III, I , IV , II , V (c) I, III , II , IV ,V (d) II , IV , III, I,V

Assertion: Vigorous contraction of the uterus at the end of pregnancy causes expulsion. Reason: The stimulatory reflex between the uterine contraction and oxytocin secretion results in weakening contractions.

Assertion : Pituitary gland releases a hormone which is helpful in child birth. Reason : Pituitary gland releases vasopressin and anti diuretic hormone which helps in child birth.

Assertion : Diabetes insipidus is marked by excessive urination and too much thirst for water. Reason : Anti- diuretic hormone (ADH) is released by the posterior lobe of pituitary gland.

Assertion : Neural signals through sympathetic nerves can increase the strength of ventricular contraction Reason : Parasympathetic neural signals synergistically act with sympathetic neutral signal to increase the cardiac output.