Practice free Human Reproduction (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Where is the milk secreted by alveolar cells stored before being expressed?
The text states: 'The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli.'
Which of the following accurately describes the pathway of milk from its production site to the nipple?
Based on the description: 'The alveoli open into mammary tubules. The tubules of each lobe join to form a mammary duct. Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous duct and opens at the nipple.'
The stimulatory reflex during parturition involves uterine contractions and what specific hormone secretion?
The text states: 'Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. The stimulatory reflex between the uterine contraction and oxytocin secretion continues...'
Differentiation of mammary glands occurs primarily during which phase?
The text mentions: 'Mammary glands differentiate during pregnancy' and 'The mammary glands of the female undergo differentiation during pregnancy'.
What is expelled out of the uterus soon after the infant is delivered during parturition?
The text specifies: 'Soon after the infant is delivered, the placenta is also expelled out of the uterus.'
Why is breast-feeding recommended during the initial period of infant growth?
The context explains: 'Breast-feeding during the initial period of infant growth is recommended by doctors for bringing up a healthy baby' specifically because colostrum 'contains several antibodies absolutely essential to develop resistance for the new-born babies.'
The primary event that leads to an increase in oxytocin release from the maternal pituitary during parturition is:
The text states: 'which induce mild uterine contractions called foetal ejection reflex. This triggers release of oxytocin from the maternal pituitary.'
Which of the following events strictly indicates the onset of a new menstrual cycle?
The menstrual cycle starts with the menstrual phase, when menstrual flow occurs. This flow marks the beginning of a new cycle after the degeneration of the corpus luteum in the absence of fertilization. (Refer to paragraph 1, page 34: 'The cycle starts with the menstrual phase, when menstrual flow occurs...').
What is the approximate duration of the menstrual flow during the menstrual phase?
The menstrual flow occurs during the menstrual phase and typically lasts for 3-5 days. (Refer to paragraph 1, page 34: 'The cycle starts with the menstrual phase, when menstrual flow occurs and it lasts for 3-5 days.').
Lack of menstruation can be indicative of pregnancy, but what other conditions can also cause it?
While lack of menstruation (amenorrhea) can indicate pregnancy, it 'may also be caused due to some other underlying causes like stress, poor health etc.' (Refer to paragraph 1, page 34).
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