Seminal plasma in human males is rich in
fructose and calcium
glucose and calcium
DNA and testosterone
DNA and testosterone
A.
fructose and calcium
Seminal plasma is the fluid in which sperms are bathed. It contains secretions from seminal vesicle and prostate gland. Seminal fluid contains fructose, citrate, inositol, prostaglandins and several proteins. Prostate secretes a thin, milky fluid that contains calcium, cittrate ion, phosphate ion, a clotting enzyme and a profibrinolysin.
Vasa efferentia are the ductules leading from
testicular lobules to rete testis
rete testis to vas deferens
vas deferens to epididymis
vas deferens to epididymis
B.
rete testis to vas deferens
Rete testis is connected to caput epididymis by 12-20 fine tubules called vasa efferentia or ductuli efferens. These collect sperms from inside the testis and transfer them to the epididymis. Vas deferens arises from caudal epididymis, conducts sperms from epididymis to urethra.
Ureters act as urogenital ducts in
humans males
human females
frog's both males and females
frog's both males and females
D.
frog's both males and females
In the male frog, vasa efferential finally communicates with the urogenital duct tat comes out of the kidneys and open into claca. The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms to the exterior.
In vitro fertilisation is a technique that involves the transfer of which one of the followings into the Fallopian tube?
Embryo only, up to 8 cells stage
Either zygote or early embryo up to 8 cell stage
Embryo of 32 cells stage
Embryo of 32 cells stage
B.
Either zygote or early embryo up to 8 cell stage
In vitro fertilisation (IVF) or test -tube baby technique involves fertilising one or more eggs outside the body then transferring the fertilised eggs known as pre - embryos back into the uterus. Zygote Intra-Fallopian Transfer (ZIFT) is an example of IVF. In this, the zygote or early embryos up to 8blastomeres are transferred into the fallopian tube. if the embryo has more than 8 blastomeres then it is transferred into uterus called as IUT.
Sertoli cells are found in
Ovaries and secrete progesterone
adrenal cortex and secrete adrenalin
seminiferous tubules and provide nutrition to germ cells
seminiferous tubules and provide nutrition to germ cells
C.
seminiferous tubules and provide nutrition to germ cells
The epithelium of seminiferous tubule is made up of two types of cells -Sertoli cells and spermatogenic cells and spermatogenic cells. Sertoli cells are elongated and pyramidal which partially envelop the spermatogenic cells. These nourish spermatozoa, act as nurse cells for differentiating spermatozoa. These secrete a glycoprotein hormone, called inhibin which is involved in the negative feedback control of sperm production.