17971060
Descrição
Quiz por Trent McNutt, atualizado more than 1 year ago
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Criado por Trent McNutt
aproximadamente 5 anos atrás
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Questão 1
Questão
What is the purpose of white blood cells within the FRT?
Responda
-
Spermatozoa are foreign to the female reproductive tract. Some are attacked by white blood cells.
-
None.
Questão 2
Questão
What is one benefit and one challenge that is a result of these white blood cells being in the female reproductive tract?
Responda
-
Non-motile and abnormal spermatozoa are removed (benefit)
-
Other normal cells may be removed (challenge)
Questão 3
Questão
What is capacitation?
Responda
-
The biochemical change to sperm that allows the true acrosome reaction to occur
-
None
Questão 4
Questão
How does capacitation alter sperm motility?
Responda
-
Change in tail motility (hyper-activation)
-
None
Questão 5
Questão
Fertilization can occur without capacitation.
Responda
- True
- False
Questão 6
Questão
What is the primary purpose of the acrosomal reaction?
Responda
-
Fusion of sperm plasma membrane and outer acrosomal membrane
-
None
Questão 7
Questão
What is “vesiculation”?
Responda
-
Pores develop at point of fusion and enzymes in the acrosome can be released
-
None.
Questão 8
Questão
How does the nucleus of the sperm change once the sperm is engulfed by the oocyte?
Responda
-
Decondenses
-
None
Questão 9
Questão
Label the layers/parts of the oocyte labeled A, B, and C.
Image:
Oocyte (binary/octet-stream)
Responda
-
Zona pellucida
-
None
-
Perivitelline space
-
None
-
Oocyte nucleus
-
None
Questão 10
Responda
-
ootid
-
None
-
Zygote
-
None
-
Two-celled stage
-
None
-
Four-celled stage
-
None
Questão 11
Questão
What is the function of the allantois?
Responda
-
Carries blood vessels of placenta
-
None
Questão 12
Questão
What is the function of the amnion?
Responda
-
Protects fetus from injury, provides lubrication for parturition, reservoir for urine and wastes
-
None
Questão 13
Questão
Maternal recognition of pregnancy is necessary in many species to prevent pregnancy loss caused by what irreversible event?
Responda
-
Luteolysis
-
None
Questão 14
Questão
In order for maternal recognition of pregnancy to occur in the ewe/cow, what (if anything) is secreted by the conceptus to signal its presence
Responda
-
Interferon Tau
-
None
Questão 15
Questão
How does the presence of the conceptus affect PGF2α production?
Responda
-
Protects CL by preventing PGFRa pulses.
-
None
Questão 16
Questão
In order for maternal recognition of pregnancy to occur in sows, what (if anything) is secreted by the conceptus to signal its presence?
Responda
-
Estrogen
-
None
Questão 17
Questão
How does the presence of the conceptus affect PGF2α production in sows?
Responda
-
Estradiol does not inhibit PGF2a but causes it to be rerouted -> away from submucosal capillaries (for countercurrent exchange transport)
-
None
Questão 18
Questão
In order for maternal recognition of pregnancy to occur in mares, what must happen?
Responda
-
Embryo must migrate between horns from days 12 – 17 of gestation
-
Presence of the conceptus prevents Luteolysis -> reduces endometrial production of PGF2a
Questão 19
Questão
Complete the table below to indicate the correct classification of placenta for each species. The dog is provided as an example
Responda
-
Epitheliochorial
-
Epitheliochorial also
-
Hemochorial
-
Epitheliochorial again
-
Diffuse
-
Diffuse also
-
Cotyledonary
-
Discoid
Questão 20
Questão
Describe the main characteristics of a diffuse placenta type.
Responda
-
Uniform distribution of chorionic villi
-
Initial attachment occurs around day 12 of gestation and is well established by day 18 – 20 after fertilization
Questão 21
Questão
How does the zonary placenta type differ from the diffuse placenta type?
Responda
-
Has prominent exchange region (chorionic villi) that forms a zone near the middle of the conceptus
-
None
Questão 22
Questão
The placental unit of trophoblastic origin consisting of abundant blood vessels and connective tissue, found in ruminants, is called:
Responda
-
Cotyledon
-
None
Questão 23
Questão
Although mares, sows, and ruminants (ex: cows) all have epitheliochorial placentas, the placenta of the cow is different compared to the sow and mare. What are 2 differences?
Responda
-
Caruncles/Endometrial folds
-
None
Questão 24
Questão
When classifying placentas based on level of intimacy/number of tissue layers, what type would have 6 layers?
Responda
-
Epitheliochorial
-
None
Questão 25
Questão
Which is the “most intimate placenta type”?
Responda
-
Hemochorial
-
None
Questão 26
Questão
The fetus triggers the onset of parturition by secreting [blank_start]cortisol[blank_end].
Responda
-
cortisol
-
None
Questão 27
Questão
What 3 hormones contribute to myometrial contractions during parturition?
Responda
-
Oxytocin
-
Estrogen
-
PGF2a
Questão 28
Questão
Which hormone is released as a consequence of pressure on the cervix?
Responda
-
Oxytocin
-
None
Questão 29
Questão
Which hormone allows for loosening/widening of the birth canal to allow for parturition?
Responda
-
Relaxin
-
None
Questão 30
Questão
What is dystocia?
Responda
-
trouble giving birth
-
None
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