Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. Answer : (c)

The ovulation process is regulated by fluxing gonadotropic hormone (FSH/LH) levels. FSH stimulates the growth and maturation of immature oocytes into mature (Graafian) follicles before ovulation. Luteinizing Hormone (LH) is a gonadotropin synthesized and secreted by the anterior pituitary gland in response to GnRH Answer : (d)

FSH stimulates the growth and maturation of immature oocytes into mature (Graafian) follicles before ovulation. Luteinizing Hormone (LH) is a gonadotropin synthesized and secreted by the anterior pituitary gland in response to GnRH Answer : (a)

The Blastula is the early stage of development. When this occurs, the embryo is a ball of hollow cells. The Gastula stage follows Blastula. It includes the three-layer of cells. Answer : (d)

Aerobic exercises which increase your heart rate are the best for relieving period cramps. Cycling falls under that category. exercise bike causes three times as large an increase in the production of the hormone So there is no reason for her menstrual failure But possible if she is pregnant or Fertilisation of ovum Answer : (a)

Answer : (d)

A hysterectomy is an operation procedure used to remove the uterus (womb). The ovaries produce eggs or ova and production of hormones or chemicals, which regulate menstruation and other aspects of health and well-being, including sexual well-being. The ovaries generally continue to produce hormones and undergo monthly cycle under the influence of pituitary hormones, although in some cases they may have reduced activity. Some hysterectomies also include removal of the ovaries, so the supply of essential female hormones is greatly reduced. This can have various effects. Thus, the correct answer is option d. Answer : (b)

Answer : (d)

Answer : (c)

The oogonia form primary oocytes before birth. Primary oocytes begin the first meiotic division before birth but do not complete prophase 1 and stay dormant until puberty. The cell division is oogonia is arrested at the diplotene stage of prophase I. Thus the correct answer is option B. Answer : (b)

Answer : (b)

Gynecomastia : Enlarged breasts in men is an increase in the amount of breast gland tissue in boys or men, caused by an imbalance of the of the hormones estrogen and testosterone. Option 'd' correct Feminization is the shift in gender roles and sex roles in a society, group, or organization towards a focus upon the feminine. Gynoecium is the female part of a flower, consisting of one or more carpels. Answer : (d)

Progesterone is a female sex hormone. It's produced mainly in the ovaries following ovulation each month. Answer : (b)

The corona radiata is an outer layer of follicular (granulosa) cells that form around a developing oocyte in the ovary and remain with it upon ovulation. Immediately after ovulation, the mammalian egg is covered by a membrane known as zona pellucida. It is a glycoprotein layer surrounding the plasma membrane of mammalian oocytes. It is a vital constitutive part of the oocyte. It is secreted by both the oocyte and the follicular cells. Therefore, the correct answer is option b. Answer : (a)

The inner lining of the uterus (the endometrium) goes through three phases during the typically 28 day menstrual cycle: the menstrual phase (days 1-5), The proliferative phase (days 6-14) , The endometrium is thinnest during the period, and thickens throughout this phase until ovulation occurs and The secretory phase (days 15-28). The ovarian cycle, refers to the cycle in which a woman’s ovaries prepare an egg to be released during ovulation Answer : (a)

External genitalia of human female: Mons pubis, Labia majora, Labia minora, Clitoris, Vestibule, Hymen, Vestibular bulb, Vestibular glands Answer : (d)

In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus. At this stage of prenatal development, the conceptus is called a blastocyst. It is by this adhesion that the embryo receives oxygen and nutrients from the mother to be able to grow. Answer : (c)

Seminiferous tubules are located within the testes, and are the specific location of meiosis, and the subsequent creation of male gametes, namely spermatozoa. Answer : (d)

Corpus luteum is the remains of the ovarian follicle that has released a mature ovum during a previous ovulation. Answer : (c)

Dispersal of cells in the outer egg envelope (corona radiata) is caused by the action of an enzyme (hyaluronidase) that breaks down a substance (hyaluronic acid) binding corona radiata cells together. Answer : (d)

The mitochondria lies in the middle piece which provides energy to the sperm to swim. The tail helps the sperm to swim across Answer : (b)

Fluids contributed by the seminal vesicles are approximately 60 percent of the total semen volume; these fluids contain fructose, amino acids, citric acid, phosphorus, potassium, and hormones known as prostaglandins. Answer : (c)

A primary spermatocyte will have 46 chromosomes or chromatids. Primary spermatocytes are diploid cells. Secondary spermatocytes are haploid cells with only 23 chromosomes. Answer : (c)

Answer : (b)

The temperature in scrotum necessary for sperm formation should be 2°C below body temperature. The slightly cooler temperature of the scrotum is necessary for the development of normal sperm. Answer : (b)

Fertilizin is a glycoprotein whose protein part is made up of many amino acids and the carbohydrate part is composed of one or more monosaccharide sugars. Answer : (d)

Capacitation is a process whereby the glycoprotein coat is modified and seminal proteins are removed from the surface of the sperm Answer : (c)

Answer : (a)

The primary spermatocyte divides meiotically (Meiosis I) into two secondary spermatocytes. Each secondary spermatocyte divides into two equal haploid spermatids by Meiosis II. Answer : (a)

The male accessory glands are the prostate, Cowpers (bulbourethral gland), seminal vesicles, ampullary gland and urethral glands. Answer : (a)