Study Material for Apr 8 Quiz
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What occurs in the magnum of a bird?
The majority of the albumen layers are secreted
What are the parts of the uterus?
1 body and 2 horns
What is the chorion?
The membrane that surrounds the amnion sac
What is the priority system for use of nutrients in pregnant animals?
• Nervous tissue/vital organs • Repro • Bone • Muscle • Fat
What is somatotropin?
A hormone that is produced in the pituitary gland and is formed from species-specific amino acid chains; targets entire body to increase cell growth, mitosis, protein production, and bone growth
How many eggs does one full round of meiosis produce?
1 (and 3 polar bodies)
What occurs in the oviduct (fallopian tube)?
The ovulated egg is caught by the infundibulum at the part of the oviduct closest to the ovary; fertilization occurs in the oviduct and zygote is transported to uterus
What is bilateral cryptorchidism?
A condition in which neither testicle descends through the inguinal canal; reduced testosterone and much lower fertility
What are the functions of the uterus?
Sperm movement up to the oviduct, nourishment through uterine “milk,” attachment and nourishment of fetus via placenta, contractions to force fully developed fetus to outside
What is hyperplasia?
An increase in cell numbers
What is a cotyledonary placenta?
The type of placenta where the allantochorion attaches to the uterine wall in specialized areas
What is the embryonic phase of prenatal growth?
Cell differentiation into tissues and organs; small increases in weight
What are the influences of sex effects on rate of growth?
M > CM > F
What are the influences of sex effects on rate of fattening in cattle and sheep?
F > CM > M
What are the extra-embryonic membranes?
Yolk sac, amnion, chorion, allantois, and allantochorion
What form is the cervix in during pregnancy?
Closed, with a thick mucus “plug”
What are the two types of tissue in the testicles?
Interstitial and Seminiferous tubules
What are the vas deferens?
Passageways that carry sperm cells and substances from the epididymis to the urethra
What are the 5 stages of the oviduct in a bird?
Infundibulum, magnum, isthmus, shell gland, and vagina
Where is semen deposited in most animals?
The vagina
What are mineralocorticoids?
Hormones that regulate the concentrations of minerals
What factors limit growth?
Nutrition, disease, and parasites
What is meiosis?
The division of cells that occurs in the seminiferous tubules or ovaries to produce haploid gametes
What are the nutrient sources before implantation?
Uterine milk in the yolk sac or allantois