Description : Androgens are synthesised in (A) Leydig cells in testes (B) Sertoli cells in testes (C) Seminiferous tubules (D) Prostate gland
Last Answer : Answer : A
Description : Sertoli cells are found in (a) ovaries and secrete progesterone (b) adrenal cortex and secrete adrenaline (c) seminiferous tubules and provide nutrition to germ cells (d) pancreas and secrete cholecystokinin.
Last Answer : (c) seminiferous tubules and provide nutrition to germ cells
Description : Select the correct sequence for transport of sperm cells in male reproductive system. (a) Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → ... → Urethral meatus (d) Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra
Last Answer : (c) Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
Description : The difference between spermiogenesis and spermiation is (a) in spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed (b) in spermiogenesis spermatozoa are formed, ... in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules
Last Answer : (d) in spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.
Description : The difference between spermiogenesis and spermiation is (1) In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed. (2) In spermiogenesis spermatozoa are formed, ... in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.
Last Answer : (4) In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.
Description : Prolonged testosterone therapy can cause: A. Hypertrophy of seminiferous tubules of testes B. Hypertrophy of interstitial cells of testes C. Atrophy of interstitial cells of testes D. Both ‘A’ and ‘B’ are correct
Last Answer : C. Atrophy of interstitial cells of testes
Description : .Which one of the following cells, found in testes of rabbit, secretes male hormone? (a) Epithelial cells (b) Spermatocytes (c) Leydig’s cell (d) Sertoli cells
Last Answer : (c) Leydig’s cell
Description : 'Barr body' is found in - (1) Sperm (2) Sertoli cells (3) Female somatic cells (4) Male somatic cells
Last Answer : (3) Female somatic cells Explanation: A Barr body is the inactive X chromosome in a female somatic cell in those species in which sex is determined by the presence of the Y or W chromosome rather ... typical human female has only one Barr body per somatic cell, while a typical human male has none.
Description : ‘Barr body’ is found in (1) Sperm (2) Sertoli cells (3) Female somatic cells (4) Male somatic cells
Last Answer : Female somatic cells
Description : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the age of fifty years . Reason : Human male having
Last Answer : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the ... D. If both Assertion & Reason are False.
Description : Connective tissue around seminiferous tubules possess endocrine cells called
Last Answer : Connective tissue around seminiferous tubules possess endocrine cells called A. leydig cells B. Sertoli cells C. Primary germ cells D. Both A and B
Description : The nutritive cells found in seminiferous tubules are:
Last Answer : The nutritive cells found in seminiferous tubules are: A. Leydig cells B. Sertolic ells C. Atretic follicular cells D. Chromaffin cells.
Description : Which of the following statement about reproductions in human is correct. a) fertilisation takes place externally b) fertilisation takes place in the testes c) during fertilisation egg moves towards sperm d) fertilisation takes place in human female
Last Answer : d) fertilisation takes place in human female
Description : why are seminiferous tubules not the same shape -Biology
Last Answer : answer:
Description : why are seminiferous tubules so long -Biology
Description : Release of sperms from seminiferous tubules is called
Last Answer : Release of sperms from seminiferous tubules is called A. Spermiogenesis B. Spermiation C. Spermatogenesis D. Fertilization.
Description : Outer coat of seminiferous tubules is composed of fibrous connective tissue called
Last Answer : Outer coat of seminiferous tubules is composed of fibrous connective tissue called A. Tunica ... propria C. Plica semilunaris D. Tunica albuginea
Description : Seminiferous tubules occur in the
Last Answer : Seminiferous tubules occur in the A. liver B. kidney C. ovary D. testis
Description : Seminiferous tubules are composed of
Last Answer : Seminiferous tubules are composed of A. Spermatogonia B. Glandular epithelium C. Sensory epithelium D. Germinal epithelium
Description : Proximal and distal convoluted tubules are parts of (a) seminiferous tubules (b) nephron (c) oviduct (d) vas deferens
Last Answer : (b) nephron
Description : Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body temperature . Reason : Formation of sperm does not occur a
Last Answer : Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body ... False . D. If both Assertion & Reason are False.
Description : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen
Last Answer : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . ... . D. If both Assertion & Reason are False.
Description : (i) Write the specific location and the functions of the following cells in human males Leydig cells Sertoli cells Primary spermatocyte (ii) Explain the role of any two accessory glands in human male reproductive system. -Biology
Last Answer : I)Oogenesis begins during the embryonic development stage when a million gamete mother cells (oogonia) are formed within each foetal ovary. (ii) (a) Sertoli cells are located on the inside ... provide nutrition to sperms. (b) Bulbourethral glands Their secretion helps in the lubrication of penis.
Description : Male hormone is produced in the testis by cells of (a) Sertoli (b) epithelial (c) spermatocytes (d) Leydig.
Last Answer : (d) Leydig.
Description : Assertion : Primary spermatocytes of testes are haploid . Reason : Primary spermatocytes are formed by meiosis I in the spermatogonia .
Last Answer : Assertion : Primary spermatocytes of testes are haploid . Reason : Primary spermatocytes are formed by ... . If both Assertion & Reason are False.
Description : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum . Reason : Spermatogenesis process requires les
Last Answer : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum ... . D. If both Assertion & Reason are False.
Description : Assertion : The testes are situated outside the abdominal cavity within scrotum . Reason : Lower temperature for the testis is necessary for spermatog
Last Answer : Assertion : The testes are situated outside the abdominal cavity within scrotum . Reason : Lower ... . If both Assertion & Reason are False.
Description : Assertion: Light-harvesting complexes (LHC) on thylkoid membrane broaden the range of light absorption: Reason: They transfer electrons to reaction ce
Last Answer : Assertion: Light-harvesting complexes (LHC) on thylkoid membrane broaden the range of light absorption: ... . If both Assertion and Reason are false.
Description : Assertion :- M-phase is the most dramatic period of the cell cycle. Reason :- It involves a major reorganisation of virtually all components of the ce
Last Answer : Assertion :- M-phase is the most dramatic period of the cell cycle. Reason :- It involves a major ... False. D. If both Assertion & Reason are false.
Description : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce
Last Answer : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each ... D. If both Assertion & Reason are false.
Description : Assertion : Meiosis produces four genetically dissimilar cells. Reason : Crossing over or gene exchange takes place in meiosis.
Last Answer : Assertion : Meiosis produces four genetically dissimilar cells. Reason : Crossing over or gene exchange ... . If both Assertion & Reason are false.
Description : Assertion `:-` Peritubular capillaries secrete substances in the convoluted tubules. Reason `:-` Harmful and useless substances which escaped ultrafil
Last Answer : Assertion `:-` Peritubular capillaries secrete substances in the convoluted tubules. Reason `:-` Harmful ... D. If both Assertion & Reason are false.
Description : Assertion `:-` Nearly 99 percent of the filtrate has to be reabsorbed by the renal tubules. Reason `:-` Glucose is reabsorbed by active mechanism is P
Last Answer : Assertion `:-` Nearly 99 percent of the filtrate has to be reabsorbed by the renal tubules. Reason ` ... . D. If both Assertion & Reason are false.
Description : In humans, at the end of the first meiotic division, the male germ cells differentiate into the
Last Answer : In humans, at the end of the first meiotic division, the male germ cells ... Spermatozonia C. Primary spermatocytes D. Secondary spermatocytes
Description : n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.
Last Answer : (d) secondary spermatocytes.
Description : Assertion `:-` Proximal convoluted tubule is lined by brush-bordered cuboidal epithelium. Reason `:-` PCT is main site of selective reabsorption of us
Last Answer : Assertion `:-` Proximal convoluted tubule is lined by brush-bordered cuboidal epithelium. Reason `:-` ... D. If both Assertion & Reason are false.
Description : Assertion `:-` In PCT all of the essential nutrient and 70-80 percent of electrolytes and water are reabsorbed. Reason `:-` PCT is lined by simple cub
Last Answer : Assertion `:-` In PCT all of the essential nutrient and 70-80 percent of electrolytes and water are ... . D. If both Assertion & Reason are false.
Description : Assertion : Urinary Bladder is lined by transitional epithelium . Reason : Transitional epithelium keeps the size of the bladder constant at all times
Last Answer : Assertion : Urinary Bladder is lined by transitional epithelium . Reason : Transitional epithelium keeps ... If both Assertion & Reason are false.
Description : Assertion : Ureter and Urinery bladder are lined with Transitional Epithelium. Reason : Transitional Epithelium rest directly on Connective tissue .
Last Answer : Assertion : Ureter and Urinery bladder are lined with Transitional Epithelium. Reason : Transitional ... If both Assertion & Reason are false.
Description : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite. Reason: Haematite oxidises
Last Answer : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined ... -1 is false but Statement -2 is true
Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.
Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.
Description : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked by completion of karyokinesis and cytokinesis as we
Last Answer : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked ... . D. If both Assertion & Reason are false.
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . Reason : It contains sperm lysin .
Last Answer : Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . ... . D. If both Assertion & Reason are False.
Description : Assertion: Cu-T and Cu-7 do not suppress sperm motility. Reason: Hormones released by them affect sperm motility.
Last Answer : Assertion: Cu-T and Cu-7 do not suppress sperm motility. Reason: Hormones released by them affect ... D. If both the assertion and resson are false.
Description : Why testes descend down In human male fetus before birth?
Last Answer : Look up the SRY gene located on the sex chromosomes. The SRY gene when turned on in epistatis controls that.
Description : Male reproductive organs of flukes have A A. Two testes B. Two pair of testes C. Numerous testes D. Both a and b
Last Answer : Two testes
Description : The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for (a) maintaining the scrotal temperature lower than the internal body ... growth of epididymis (d) providing a secondary sexual feature for exhibiting the male sex.
Last Answer : (a) maintaining the scrotal temperature lower than the internal body temperature