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list any four methods of contraception used by humans. how does their use have a direct effect on the health and prosperity of the family?
Assertion:Zona pellucida do not dissappears when blastocyst reaches the uterus .
Reason:Role of zona pellucida is to check the implantation of the blastocyst at the veginal site.
why menstrual blood doesn't clot?
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
Draw a neat labelled sketch of Graafian follicle.
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
What is spermatogenesis? Briefly describe the process of spermatogenesis.
how mammary glands are integrated structurally and functionally to support the process of ovulation, fertilization, pregnancy, birth and child care?????
plz explain, these lines are written in NCERT textbook.
what is sporogenous tissue?
give a labeled diagram of spermatogenesis as im finding it difficult to understand .
Draw a labeled diagram of female reproductive system.
what is embryo proper?
why is menstrual cycle absent during pregnancy?
the function of prostate gland is ......?
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
A female of 30 yrs age attained puberty at the age of 13 yrs. She has three children born by normal delivery. How many polar body are formed in her body till date. (Each M.C. is of 30 days) :
(1)160
(2)159
(3)162
(4)161
The correct answer is (3). Could you please explain ? Question from Human Reproduction Class XII
Why does failure of testes to descend into the scrotum produce sterility?
explain male reproductive system
difference between testosterone and androgens. also tell their functions.
what is major difference between spermatogenesis & oogenesis?
difference between ducts and glands????
what is foetal ejection reflex?
Secondary oocyte retains bulk of the nutrient rich cytoplasm of the primary oocyte. Can you think of any advantage for this? rn Does the first polar body born out of first meiotic division divide further or degenerate?rn
WHAT IS PREGNANCY HORMONE? WHY IT IS CALLED SO? NAME TWO SOURCES OF THIS HORMONE IN HUMAN FEMALE?
from where do signals of parturition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?
The ensure of effectiveness of reproduction and survival of embryo in mammals is :
distingiush b/w morula gastrula and blastula
1.What is the difference between seminal plasma,seminal secretion and semen?
Can anal sexual intercouse lead to fertilisation?If not, then why it is done?
WHAT IS THE FUNCTION OF INFUNDIBULUM
DIFFERENCE BETWEEN SPERMIOGENESIS AND SPERMIATION
Q--. Identify the wrong statement from the following:a. High levels of estrogen triggers the ovulatory surge.b. Orgonial cells start to proliferate and give rise to functional ova inregular cycles from puberty onwards.c. Sperms released from seminiferous tubules are poorly motile /non-motile.d. Progesterone level is high during the post ovulatory phase ofmenstrual cycle.also explain...........
difference between zoospore and zygote ?
what is oogenesis?
why sertoli cells are very much essential during spermatogenesis
List the changes the primary oocyte underqoes in the tertiary follicular stage in the human ovary.
Define peripheral cortex & Inner medulla??
What are the three major phases of menstrual cycle in primates?Mention the key event in each phase.
what is spermatic cord? What is gubernaculum?
why is placenta called a temporary endocrine gland?
Draw a labelled diagram of Blastocyst
when and how does placenta develop in human female?
spermatogenesis in human male is a hormone regulated process. justify
which hormone is called as the pregnancy hormone? ...why ?
Draw a labeled diagram of sperm.
explain the steps in the formation of an ovum from an oogonium in humans
what is corona radiata?what is the difference between corona radiata and zona pellucida?
why does not all copulations lead to pregnancy???
What is mean by Spermlysin ??????????
after tubectomy does menstrual cycle continue? there is a knot tied in the tube so how does the cycle takes place? pls give a proper answer
What is the difference between umbilical cord and placenta??
Draw a labeled diagram of a Graafian Follicle?
if asked to draw a labbeled diagram of male reproductive system in exam , which one we hav to write ...
there r 2 diagrams in textbook ...
pls answer asap
URGENT!! Define seminal vessicles ,,,prostate gland and cowper's gland.????
dear experts
1.why is oogenesis considered as a discontinous and wasteful process?
2.is ejaculation and insemination the same ?
3.what is monospermy?
4.how implantation takes place ?
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
What is the difference between blastulation and gastrulation?
The human male never passes on the gene for red green colour blindness to his son . How is it so ?
After a successful in vitro fertilization the fertilized egg begins for begins to divide where is this egg transferred before it reaches the 8 cell stage What is the techniques?
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Syllabus
list any four methods of contraception used by humans. how does their use have a direct effect on the health and prosperity of the family?
Assertion:Zona pellucida do not dissappears when blastocyst reaches the uterus .
Reason:Role of zona pellucida is to check the implantation of the blastocyst at the veginal site.
why menstrual blood doesn't clot?
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase
Explain the process of oogenesis.
(please explain because i want the proper answer of this ques.)
cycle is directly responsible for degeneration of
corpus luteum?
(1) Estrogen (2) Progesterone
(3) LH (4) FSH
Draw a neat labelled sketch of Graafian follicle.
how does menstrual flow occurs after tubectomy?... i mean the passage blocked then how does the degnerated egg comes out from...????
What is spermatogenesis? Briefly describe the process of spermatogenesis.
how mammary glands are integrated structurally and functionally to support the process of ovulation, fertilization, pregnancy, birth and child care?????
plz explain, these lines are written in NCERT textbook.
what is sporogenous tissue?
reason: secretion of epididymis,vas defernes, seminal vessicle, and prostate gland are essential for maturation and motility of sperms.
give reason why
both assertion and reason are true but reason is not the correct explanation of the assertion . ?
give a labeled diagram of spermatogenesis as im finding it difficult to understand .
- Assertion: The middle piece of the sperm is called its power house.
Reason: Numerous mitochondria in the middle piece produce energy for the movement of tail.- Assertion: A decrease in temperature has no effect on spermatogenesis.
Reason: Spermatogonia cannot survive the high body temperature.- Assertion: The region inside the seminiferous tubules contain Leydig cell.
Reason: Leydig cells synthesise and secrete androgen.Draw a labeled diagram of female reproductive system.
what is embryo proper?
Q15. Assume 2n = 12 in a hypothetical species. In gametogenesis, the number of chromosomes in a spermatid would be _____________ and in a first polar body would be __________
(a) 3,6 (b) 3 , 3
(c) 6 ,3 (d) 6 , 6
why is menstrual cycle absent during pregnancy?
the function of prostate gland is ......?
WHAT IS THE SIGNIFICANCE OF SPERMATOGENESIS & OOGENESIS?
A female of 30 yrs age attained puberty at the age of 13 yrs. She has three children born by normal delivery. How many polar body are formed in her body till date. (Each M.C. is of 30 days) :
(1)160
(2)159
(3)162
(4)161
The correct answer is (3). Could you please explain ?
Question from Human Reproduction Class XII
Why does failure of testes to descend into the scrotum produce sterility?
explain male reproductive system
difference between testosterone and androgens. also tell their functions.
what is major difference between spermatogenesis & oogenesis?
a) cleavage divisions bring about considerable increase in protoplasm size
b) in second cleavage division, one of the two blastomeresusually diviidea little sooner than the 2nd.
c) with more cleavages, the resultant blastomeres become larger and larger.
d) cleavage divisions result in a hollow ball of cells called morula
difference between ducts and glands????
what is foetal ejection reflex?
Explain the answer
Q7. All of the following statements concerning pregnancy are accurate EXCEPT
(a) the detection of human chlorotic gonadotropin in the urine forms the basis for pregnancy tests.
(b) the cyclic release of pituitary gonadotropins and ovarian steroids is continued.
(c) the mammary gland tissue of the pregnant woman is stimulated to develop by placental hormones.
Secondary oocyte retains bulk of the nutrient rich cytoplasm of the primary oocyte. Can you think of any advantage for this? rn
Does the first polar body born out of first meiotic division divide further or degenerate?rnQ.24. Mark the correct statement
(a) The space between cornea and lens is filled with transparent gel
(b) When all cones are stimulated equally a sensation of no light (dark) is produced
(c) Rhodopsin is purplish red protein, hence called visual purple
(d) The anterior transparent portion of choroid is called cornea
WHAT IS PREGNANCY HORMONE? WHY IT IS CALLED SO? NAME TWO SOURCES OF THIS HORMONE IN HUMAN FEMALE?
1. Macrophages
2. Mast cells
3. Fibroblasts
4. Adipocytes
from where do signals of parturition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?
The ensure of effectiveness of reproduction and survival of embryo in mammals is :
distingiush b/w morula gastrula and blastula
1.What is the difference between seminal plasma,seminal secretion and semen?
Can anal sexual intercouse lead to fertilisation?If not, then why it is done?
27. At the base of cochlea, the canal that ends at the oval win-dow is :
(a) Scala tympani (b) Scala media
(c) Scala vestibuli (d) Auditory
28. The stereo cilia of hair cells of organ of Corti are covered with a thick elastic membrane called
(a) Reissner's membrane (b) Basilar membrane
(c) Tympanic membrane (d) None of these
WHAT IS THE FUNCTION OF INFUNDIBULUM
amnion is the outer layer containing amniotic fluid that acts as shock absorber
in mammals allantois is not excretory in function
chorionic allantoic membrane develops villi and contribute in development of placenta
amnion and chorion develop as upward projection fold of somatopleure called amniotic folds
DIFFERENCE BETWEEN SPERMIOGENESIS AND SPERMIATION
Q--. Identify the wrong statement from the following:a. High levels of estrogen triggers the ovulatory surge.b. Orgonial cells start to proliferate and give rise to functional ova inregular cycles from puberty onwards.c. Sperms released from seminiferous tubules are poorly motile /non-motile.d. Progesterone level is high during the post ovulatory phase ofmenstrual cycle.also explain...........
difference between zoospore and zygote ?
1) lipids
2) hormones
3) digestive enzymes
4) none of the above
what is oogenesis?
why sertoli cells are very much essential during spermatogenesis
List the changes the primary oocyte underqoes in the tertiary follicular stage in the human ovary.
Define peripheral cortex & Inner medulla??
What are the three major phases of menstrual cycle in primates?Mention the key event in each phase.
what is spermatic cord? What is gubernaculum?
why is placenta called a temporary endocrine gland?
Draw a labelled diagram of Blastocyst
when and how does placenta develop in human female?
spermatogenesis in human male is a hormone regulated process. justify
Q). The first spinal nerve of frog is known as
(a) sciatic
(b) hypoglossal
(c) brachial
(d) glossopharyngeal
which hormone is called as the pregnancy hormone? ...why ?
Draw a labeled diagram of sperm.
T.S of mammalian testis revealing seminiferous tubules show different types of cell
explain the steps in the formation of an ovum from an oogonium in humans
what is corona radiata?what is the difference between corona radiata and zona pellucida?
Q10. Which of the following is an example of positive feedback control in the reproductive cycle of males or females ?
(a) The increased response of the hypothalamus and anterior pituitary gland in response to estrogen.
(b) The decreased response of the hypothalamus and anterior pituitary gland in response to estrogen.
(c) The inhibition of luteinizing hormone by high levels of testosterone.
d) The stimulation of luteinizing hormone by low levels of testosterone.
why does not all copulations lead to pregnancy???
Primary oocyte Secndary oocyte First polar body secondary polar body
What is mean by Spermlysin ??????????
a. oocytes
b. primary oocyte
c. oogonia
d. secondary oocytes
after tubectomy does menstrual cycle continue? there is a knot tied in the tube so how does the cycle takes place? pls give a proper answer
What is the difference between umbilical cord and placenta??
Draw a labeled diagram of a Graafian Follicle?
(a) ATP (b) Tubulin (c) Histone (d) All the above
Which one induces cell division ?
(a) Critical decrease in surface volume ratio.
(b) Critical decrease in nucleocytoplasmic or kernplasma ratio
(c) Both (a) and (b)
(d) Decrease in cell size
if asked to draw a labbeled diagram of male reproductive system in exam , which one we hav to write ...
there r 2 diagrams in textbook ...
pls answer asap
1) flagella
2) cilia
3) neutrophils
4) none of the above
URGENT!! Define seminal vessicles ,,,prostate gland and cowper's gland.????
dear experts
1.why is oogenesis considered as a discontinous and wasteful process?
2.is ejaculation and insemination the same ?
3.what is monospermy?
4.how implantation takes place ?
does menstruation occur even after tubectomy in females?? and does ovulation too occurs??
What is the difference between blastulation and gastrulation?
The human male never passes on the gene for red green colour blindness to his son . How is it so ?
embryo is
(1) 100% foetal (deoxygenated)
(2) 50% maternal (oxygenated) + 50% foetal
(deoxygenated)
(3) 50% maternal (deoxygenated) + 50% foetal
(oxygenated)
(4) 100% foetal (oxygenated)
After a successful in vitro fertilization the fertilized egg begins for begins to divide where is this egg transferred before it reaches the 8 cell stage What is the techniques?