Q. No.A male can be infertile if:
1.
the sperm count is less than 20 million per ml of semen
2.
only 75% of the sperms are morphologically normal
3.
only 75 % of the sperm exhibit vigorous motility
4.
the Bulbourethral gland secretion is reduced to 75%
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
A hormone secreted by the placenta and used in pregnancy to develop fetal metabolism and general growth and development is:
| 1. | Thyroxin | 2. | Cortisol |
| 3. | hPL | 4. | hCG |
The most accurate sequence of hormones secreted during a typical menstrual cycle will be:
| 1. | FSH, LH, estrogen, progesterone |
| 2. | LH, FSH, estrogen, progesterone |
| 3. | FSH, estrogen, LH, progesterone |
| 4. | FSH, estrogen, progesterone, LH |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
During embryonic development, which of the following structures actually differentiates into the embryo?
| 1. | Morula | 2. | Blastocyst |
| 3. | Inner cells mass | 4. | Trophoblast cells |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
At what stage of the follicular development does the primary oocyte complete its first meiotic division?
| 1. | Primary follicle | 2. | Secondary follicle |
| 3. | Tertiary follicle | 4. | Graafian follicle |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The menstrual cycle in human females involves two cycles - the ovarian cycle and the uterine cycle. While the ovarian cycle describes changes that occur in the follicles of the ovary, the uterine cycle describes changes in the endometrial lining of the uterus. The term that will be descriptive of a phase in the ovarian cycle but not the uterine cycle is:
| 1. | Menstruation | 2. | Luteal phase |
| 3. | Proliferative phase | 4. | Secretory phase |
The hypothalamus and the pituitary gland mainly control the menstrual cycle. A series of physiological and anatomical processes of puberty culminates in menarche. Which of the following is the most important causal reason for the onset of puberty?
| 1. | The release of pulses of GnRH by the hypothalamus |
| 2. | The release of gonadotropins by the anterior pituitary |
| 3. | Inhibition of GnRH due to increase in circulating gonadotropins |
| 4. | Secretion of estrogen by the ovaries in response to pituitary hormones |
Consider the given two statements:
I. Secretion of androgen-binding protein (ABP) by Sertoli cells is very important for effective spermatogenesis.
II. Testosterone is required in large local concentrations to maintain the process.
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. Only I is correct.
4. Both I and II are incorrect
Consider the given statements:
I. Primary oocyte begins meiosis I embryonic development, but gets arrested in the diplotene stage of prophase I until puberty.
II. Immediately after meiosis I, the haploid secondary oocyte initiates meiosis II but gets arrested at metaphase II stage until fertilization, if such should ever occur.
III. If the secondary oocyte is not fertilized it does not complete meiosis II and doesn't become an ovum.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Identify the correct statement:
| 1. | Sertoli cells help in spermiation |
| 2. | The sperms are stored in seminal vesicles in humans |
| 3. | Corpus Albicans secretes large amounts of progesterone |
| 4. | For normal fertility, at least 40% sperms must show vigorous motility |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.