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9 Cards in this Set
- Front
- Back
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describe protostomes:
1. cleavage 2. cell dtermination 3. blastopore 4. coelom formation |
1. spiral
2. future of embryonic cell is determined, damage->no recovery 3. mouth 4. mesodermal cells splite to form coelom |
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describe deuterostomes:
1. cleavage 2. cell dtermination 3. blastopore 4. coelom formation |
1. radial like a cube
2. future of embryonic cell is undetermined (stem cells)->can lead to identical twins 3. anus 4. outpocket of archenteron |
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describe spermatogenesis?
1. which individual 2. which organ 3. length of process 4. pathway 5. seminiferous tubule 6. leyding cells 7. vas derferns |
1. male
2. testes 3. pathway 4. spermatogensis (2N, 4C) ->mitosis->->spermatogonia->S phase->->1(primary) spermatocyte (2N, 4C)->meiosis->->(2) 2 (secondary) spermatocytes->meiosis 2->(4) spermatides (1N, 1C) (immature, not going to be released, lack tails)->maturation in epididymis->->sperms (viable, whole structure) 5. production of sperm 6. produce testosterone for process 7. leads from epididymus |
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0.What does SEVEN UP stand for?
1. S 2. E 3. V 4. E 5. N 6. U 7. P |
0. the location of sperm formation pathway
1. Seminiferous tubule 2. Epididiymis 3. Vas deferens 4. Ejaculatory duct 5. N (nothing :) 6. Urethra 7. Penis |
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describe oogenesis?
1. which individual 2. which organ 3. length of process 4. pathway 5 .corpus luteum 6. estrous cycle 7. menstrual cycle |
1. female
2. ovary 3. before birth 4. primordial oocyte (2N, 2C)-> S phase ->->1 oocyte (2N, 4C)->meiosisk->->(1) 2 oocyte (1N, 2C) + polar body (degrade & small because of unequal division)-> a) in human : meiosis 2 start but don't complete until sperm fertilize ->meiosis 2-->ovum + 1 polar body (degrade) b) in rats : meiosis 2 star and complete, ovlution releast true ovum before fertilization 5. cells after ovulation, release estrogen/progesterone for implantation 6. only receptive for mating @ certain point, always release true ovum 7. only secondary oocyte ovum monthly |
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describe the two blocks to polyspermy:
1. fast block 2. slow block |
1. sperm pentrates, fuses w/cell membrane, -> depolarization event (- to +)
2. ~ 1 min after sperm pentrates, cortical vesicle fuse w/egg membrane, perivitelline space expands, vitelline membrane hardens due to enzymes |
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describe & draw the stage of cell division?
1. ovum 2. two cells stage 3. 8-cells stage 4. blastula 5. gastrula |
1. fertilized egg, include animal pole (darker color) & vegetal pole (contain yolk)
2. have one cleavage, spliting one cell into two but NO growth two types of clevage: a) holoblastic-cut through embryo, b)meroblastic-cut not through embryo 3. three cuts total, NO growth - just one cell being chop up into eight equal peieces 4. multiple cells with bastocoel (fluid filled cavity) 5. cells move inward through blastopore forming 3 germ layers |
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what to note in chick embryo?
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1. brian
2. heart 3. eye 4. auditory vesicle 5. limb buds |
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define the follwoing extra-embryonic membranes?
1. chorion 2. yolk sace 3. allantois 4. aminotic membrane 5. placenta |
1. surrounds everything, hard to see, fuses w/allantois later
2. form first, surrounds yolk, nutrients for embryo 3. directly connect to embryo, waste storage & gas exchange w/chorion 4. filled with amnion, immediately surround embryo, prevent dessication (drying out), cushion 5. made up of maternal & embryonic tissues |
