Pregnancy, placenta, parturition, lactation
- Find the correct statements :A. In human pregnancy, the major organ systems are formed at the end of 12 weeks.B. In human pregnancy the major organ systems are formed at the end of 8 weeks.C. In human pregnancy heart is formed after one month of gest… Answer: 4. A, C, D and E Only Key idea: This follows the NCERT timeline of human pregnancy. Heart forms after about one month (C correct). L... 1
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby.Reason R : Colostrum cont… Answer: 2. Both A and R are correct and R is the correct explanation of A. Key idea: colostrum is the first milk, rich in antibodies (IgA).... 1
- Which of the following secretes the hormone, relaxin, during the later phase of pregnancy ? Answer: 2. Corpus luteum Relaxin, which relaxes pelvic ligaments in late pregnancy, is secreted by the corpus luteum (and placenta). Graafia... 1
- Which of these is not an important component of initiation of parturition in humans ? Answer: 4. Release of Prolactin Parturition is initiated by foetal signals, rise in oestrogen to progesterone ratio, prostaglandin synthesis... 1
- Hormones secreted by the placenta to maintain pregnancy are Answer: 2. hCG, hPL, progestogens, estrogens Key idea: The placenta works as a temporary endocrine gland. It secretes hCG, hPL (human placen... 1
- Several hormones like hCG, hPL, estrogen, progesterone are produced by Answer: 1. placenta The placenta is a temporary endocrine tissue during pregnancy. It makes hCG, hPL (human placental lactogen), estrogens a... 1