NEET Zoology Human Reproduction <
Which of the following hormone is released by placenta?
Relaxin is secreted by
How many germinal layers does embryo consist of initially, after implantation?
In human embryonic development, which layer develops between the ectoderm and endoderm?
In humans, the Inner cell mass (embryo) contains certain cells called __ cells which have the potential to give rise to all the tissues and organs,
The average time span of human gestation is
(A) 8 months
(B) 9 months
(C) 10 months
(D) 1 year
The pregnancy phase in humans is divided into how many trimesters?
After one month of pregnancy which vital organ is formed in the foetus?
In a developing foetus, most of the major organ systems are developed by the end of __ weeks.
Foetal limbs and digits are formed in the __ month of embryonic development,
The second trimester of human pregnancy is characterized by
(A) Appearance of heart and aorta
(B) Appearance of external genital organs
(C) Appearance of fine hair, eye-lashes on the eye-lids
(D) Appearance of limbs and digits
The scientific name of childbirth is
(D) Foetal development
During parturition, the mild uterine contractions which lead to expulsion of the foetus is known as
(A) Foetal ejection release
(B) Foetal ejection reflex
(C) Foetal uterine reflex
(D) Foetal placental reflex’
Which hormone is responsible for severe uterine contractions during parturition?
After delivery of the foetus the following structure is also expelled out?
(B) Corpus uterum
The production of milk in mammary gland occurs:
(A) During parturition
(B) After parturition
(C) Before embryogenesis
(D) At the end of pregnancy
The milk produced during the initial days of lactation is called
(D) None of these
The first foetal movement is observed during the __ month of embryonic development,
Embryos with more than 8 blastomeres could be transferred into the __.
(B) Fallopian tube
Transfer of an ovum from a donor to another female who can provide a suitable environment for fertilization is called
Intra cytoplasmic sperm injection is a specialized procedure in which the sperm is directly injected into the ___.
(B) Fallopian tube
In artificial insemination, the semen from husband/healthy donor is artificially introduced into the __.
(D) Both (a) and (c)
In an adult, each testis is __ in shape, with a length of about ___ and a width of about
(A) round, 4 to 5 cm, 2 to 3 cm
(B) oval, 2 to 3 cm, 4 to 5 cm
(C) oval, 4 to 5 cm, 2 to 3 cm
(D) round, 2 to 3 cm, 4 to 5 cm
Each testis has how many testicular tubules?
Male sex accessory ducts include
(ii) Vasa efferenta
(A) i, ii
(B) ii, iii
(C) i, ii, iii
(D) i, ii, iii, iv