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In the mammary gland, milk is secreted by the cells of:
The context describes: 'The glandular tissue of each breast is divided into 15-20 mammary lobes containing clusters of cells called alveoli... The cells of alveoli secrete milk.'
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 statements correctly defines the mean free path ($l$) of a gas molecule?
According to the NCERT text, 'The mean free path $l$ is the average distance covered by a molecule between two successive collisions'.
The mean free path ($l$) of gas molecules is inversely proportional to which of the following quantities, assuming other parameters remain constant?
The formula for mean free path is $l = 1 / (\sqrt{2} \pi n d^2)$. This equation clearly shows that $l$ is inversely proportional to both the number density ($n$) and the square of the diameter of the molecule ($d^2$). The NCERT text also states, 'As expected, the mean free path given by Eq. (12.40) depends inversely on the number density and the size of the molecules'.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.