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Exam 2
From ANS 316- Oregon State University
39
Veterinary Medicine
Undergraduate 3
06/09/2013

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
The pars of the pituitary gland that has the greatest endocrine function is the
Definition
Pars distalis
Term
Exposing a female fetus to androgens would result in
Definition
development of both mullerian and wolffian ducts
Term
During spermiogenesis, the axoneme develops from the
Definition
distal centrolie
Term
The anterior lobe of the pituitary is comprised of
Definition
pars distalis and pars tuberalis
Term
For most species....
Definition
  • Metaphase II oocytes are ovulated
  • the primary oocyte is fixed in a resting stage known as dictyte (sp?)
  • activation is required for completion of meiosis
  • terminal oogenetic stage is the ootid
Term
the neurohypophysis is comprised of the.....
Definition

median eminence

infundibular stalk

pars nervosa

Term
What follicle stages can a primary ooctye be found
Definition
primary-graafian follicles
Term
during spermiogenesis, the acrosome develops from the.....
Definition
golgi apparatus
Term
The hormone directly responsible for maintenance of spermiogenesis is....
Definition
testosterone
Term
In the ewe, the secretory activity of RFRP- producing neuroendocrine cells would be higher or lower in the fall?
Definition
Lower
Term
Castration will cause FSH levels to decrease or increase in the blood?
Definition
Increase
Term
Tactile erotogenic stimuli delivered to the glans penis would do what?
Definition
Stimulate the pudendal nerve to transmit sensory afferent impulses to the spinal cord
Term
Can secondary ooctyes be found in menopausal women?
Definition
No
Term
Does the activity of inhibitory neurons leading from the superior cervical ganglion increase or decrease as more light is perceived by the retinal nerves?
Definition
Increase
Term
Why are some hormone actions called "fast"
Definition
Because gene expression and protein synthetic events are not induced
Term
Why is hCG regarded as the pregnency recognition signal from the embryo?
Definition
Because it is luteotrophic and appears several days before luteolysis would occur in a non-pregnant female
Term
Definition of a hormone
Definition

Physiologic, organic chemical substance

produced by certain specialized cells

which diffuses or passes directly

into the circulation

 for the purpose of either

stimulating or inhibiting

the functional activity of a target cell, organ or tissue

Term
Hypothalamic neurohormones involved in regulating release of pituitary gland hormones are delivered into a specialized vascular bed called what?
Definition
Hypothalamic hypophyseal portal system
Term
In the male fetus, the efferent ducts develop from what?
Definition
Mesonephros
Term
In the female fetus, the oviduct develops from what?
Definition
Mullerian duct
Term
The portion of fused plasma and acrosomal membranes that seperates the acrosome from the post-acrosomal region of the sperm head is called....
Definition
equatorial segment
Term
the pocket of the ectoderm that fuses with neural ectoderm to form yje pituitary galnd
Definition
Rathke's pouch
Term
What type of cells produce equine chorionic gonadotropin
Definition
trophoblast
Term
What do trophoblast cells do?
Definition
Leave the chorionic girdle of the mare conceptus and colonize the endometrium to produce specialized endocrine organs called endometrial cups
Term
What is the hypothalamic neuropeptide formerly known as metastatin
Definition
Kisspeptin
Term
What does kisspeptin cause the release of?
Definition
Gonadotrophin releasing hormone
Term
Primordial germ cells divide mitotically to generate a population of these cells, of which most disappear by birth of the female:
Definition
oogonia
Term
[image]
Definition
Thyrotropin releasing hormone
Term
[image]
Definition
Prostaglandin F 2alpha
Term
[image]
Definition
Oxytocin
Term
[image]
Definition
Relative levels of melatonin in the ewe during a short day amd a long day
Term
[image]
Definition
Relative levels of LH in the ewe during a short day and a long day
Term
[image]
Definition
Gamma-amino butyric acid
Term
Mechanism of hormone action for GnRH induces secretion of LH
Definition
  1. GnRH binds membrane receptor on gonadotropes
  2. Activetes G protein
  3. Activates phospholipase C
  4. IP3-->DAG
  5. Activates PKC
  6. Phosphorylation rxns
  7. Activates transcription factors for LH gene
  8. Transcription of LH gene by RNA polymerase II
  9. Translation of LH mRNA
  10. Secretion of LH protein
Term
Suckling reflex arc #1
Definition
  1. Suckling
  2. Sensory afferent neurons
  3. Spinal cord
  4. hypothalamus
  5. decrease PRIH (dopamine)
  6. HHPS
  7. pars distalis
  8. lactotropes
  9. increase Prl
  10. lateral hypophyseal vein
  11. cavernous sinus
  12. jugular vein
  13. systemic circulation
  14. mammary gland
  15. glandular epithemium in alveoli
  16. maintain lactation
Term
Suckling reflex arc #2
Definition
  1. Suckling
  2. sensory afferent neurons
  3. spinal cord
  4. PVN, SON
  5. pars nervosa
  6. OT released into posterior lobe vein
  7. jugular vein
  8. systemic circulation
  9. mammary gland
  10. myoepithelial cells in alveoli
  11. compression of alveoli
Term
What does the RF in RF-related peptides mean?
Definition

R= Arginine

 

F= Phenylalanine

 

 

Term
During development of the fetal gonads, cortical tissue develops into.....
Definition
Germinal epithelium and tunica albuginea
Term
During spermiogenesis, the manchette first appears in what stage?
Definition
Acrosomal
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