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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
the main function of the mammalian corpus luteum is to produce	progesterone and estrogen
menstruation is caused by	fall in progesterone level
in humans clevaage divisions are	slow and asynchronous
are humans spontaneous ovulators ?	yes
what connects the testes to epididymis	vasa efferentia
the first movement appearanents of the foetus and appearance of hair on it 's head are usually observed during which month of pregnancy	forth month
in human female the blastocyst gets implanted	in endometrium by trophoblast cells
morula has an almost equal quantity of cytoplasm as an uncleaved zygote but much less	dna
what part of the fallopian tube is closest to the ovary	infundibulum
during spermiogenesis, histone protein is placed by-	protamines
the second maturation division of the mammalian ovum occurs	until after the ovum has been penetrated by a sperm
foetal ejection reflex in human female is induced by-	fully developed foetus and placenta
secretory phase and increased secretion of progesterone	development of corpus luteum
the chemical substance released by activated spermatozoa that acts on the ground substances of the follicle cells is known as	hyaluronidase
identical twins will be produced when	one fertilized egg devides into two blastomeres and they become seperate
which cell division is found during clavage	special mitosis
polar bodies are produced during the formation of	secondary oocyte
graafian follocle contains	a single oocyte
human egg are	alecithal
head of epididymis present at head of testis is	caput epididymis
glands secreting male sex hormone are	leydig cells
which induces the development of corpus luteum	LH
the head of mature mammalian sperm is made of	elongated nucleus convered by acrosome
no. of sec. oocytes released in the life time of a woman is approximately	400
during clevage what is true about embryo	size does not matter
amount of yolk and its distribution are changed in the egg. which one is affected	pattern of clevage
which male accessory gland is uunpaired	prostate gland
which of the following is not part of the spermatic chord	detrusor muscle
semen coagulum forming enzyme is secreted by	prostate gland
liver is originated from-	endoderm
which structure of sperm helps in making proper shape of sperm pronuclei?	manchette
acid phosphatase is marker enzyme of-	prostate gland
the number of chromosomes in cells of seminiferous tubules are?	23 and 46
all the following is function of setoli cell after birth except	it secretes AMF
accesory sex gland in human male reproductive system are	bulbo urethral gland
which of the following change does not occur during parturition?	relaxin contracts the pubic symphysis
which of following sequence followed in human embryology is correct?	syngamy --->ii meiotic division completed--->karyogamy
the first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?	fifth month
which one of the following statements about morula in humans is correct?	it has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
semen contains fluid from many parts of the secretory tract, is alkaline to help neutralize the acidic pH of vagina, contains about 20 percent morphologically abnormal sperm, and about 25 per cent immotile sperm. which of the following describes semen that contains sperm with poor motility?	asthenozoospermia
which of the following describes neuronal nitric oxide(NOS) and its action to cause penile erection?	stimulated by testosterone and parasympathetic system, relaxes muscle
a boy who has not passed through puberty sustains an injury to his anterior pituitary such that FSH is no longer released, but LH is normal. after he grows to maturity, one would except that he would	be sterile
a 38-year-old male is upset about his low sperm count and visits a practitioner who commonly advertises his miracle cures of sterility. the practitioner is a quack who treats conditions of low sperm count with megadoses of testosterone. the patient experiences a huges surge in libido. this would result in	lower sperm count
primordial germ cells are originated from	extragonadial mesoderm
which hormone is secreted only during pregnancy?	hCG,hPL, Relaxin
during pregnancy if corpus luteum containing ovary is surgically removed in second trimester than it will lead to	normal embryonic development
what will be the day of ovulation if duration of reproductive cycle in female is of 40 days?	26th day
in some eggs, the future organs can be demarcated as to the regions even before the beginning of cleavage. it is-	mosaic development
extrusion of second polar body in human's egg occurs-	after the spermatozoon has entered the egg but before the completion of act of fertilization
structures developed from ectoderm are	skin, lens of eye and nervous system
the fast block to polyspermy develops in response to the-	opening of sodium gates in the plasma membrane