Trueman Test: Human Reproduction - 3 - NEET MCQ

Morula is a developmental stage between the zygote and blastocyst. It consists of 16-32 cells.

Eye, pigment cells, and heart arise from the mesoderm.

The cervix communicates above with the body of the uterus by an aperture, the internal os and with the vagina below by an opening, the external os.

Fertilization typically occurs in the ampulla, the widest section of the fallopian tubes, because this location facilitates the meeting of sperm and ovum. The fallopian tubes' environment supports sperm motility and survival, making it the ideal site for fertilization.

If the oocyte is not fertilized, the corpus luteum degenerates in 10-12 days after ovulation and forms the corpus luteum of menstruation, and is eventually transformed into a white scar, the corpus Albicans.

A lactating mother produces about 1-2 litres of milk per day.

The entry of the sperm in the ovum stimulates the egg to resume and complete its suspended meiosis-II division, thus forming a mature egg cell.

ICSH is secreted by the anterior pituitary.

The inability of a male to achieve or hold onto an erection for complete copulation is known as impotence. Sterility is the inability of the male sperm to fertilise the ovum. Prostatic hypertrophy or prostatomegaly is the enlargement of the prostate gland.

The characteristic structural unit of the Graafian follicle is the antrum.

Cowper's gland or Bulbourethral gland is found in males responsible for lubrication of the penis. It is homologous to Bartholin gland found in females. The perineal gland is found near the anus responsible for odorous substance. The prostate gland is found in males which makes the semen alkaline in nature to neutralize the acidity of the vagina.

Rete testis, epididymis, and vasa efferentia are the parts of male reproductive system. Isthmus of uterus is a part of the female reproductive system.

Spermatozoa once released into the female reproductive tract can survive for about 1-3 days.

The external sphincter of the urethra shows the presence of striated muscle fibres around its membranous part, while the internal sphincter shows the presence of smooth muscle fibres at its beginning.

Ectoderm forms the lining of gut, gastric and intestinal glands, tongue epithelium, liver, pancreas etc. Endoderm gives rise to epidermis of skin, nasal epithelium, lacrimal glands, salivary glands, enamel of teeth etc.

The body of a mature sperm can be divided into head, neck, middle piece and tail. Middle piece is a portion of sperm, where the axial filament is covered by the helicular structure of mitochondria. A cross section at the mid-point of the middle piece of a sperm will show mitochondria centriote and 9 + 2 arrangement of microtubules.