Download Exam 1 with Answers | Reproductive Physiology and Endocrinology | ANS 3319 and more Exams Animal Biology in PDF only on Docsity!
Exam 1 (100 pts: Feb. 13, 2009) Name: _______________________________
Please match each numbered phrase with the most appropriate answer by placing the letter in the
correct blank. Answers can only be used once (1 pt each).
Y Anatomical location on mare ovary where follicle is ovulated. A) Plasma membrane
W Lipid hormones derived from arachidonic acid. B) Parenchyma
L Structure that prevents bacteria from entering uterus during pregnancy. C) Half-life
U Ovarian structure that has multiple layers of granulosa cells. D) Feedback regulation
H Ovarian steroid hormone that initiates behavioral estrus. E) glans penis
Q Steroid secreting cells located in the interstitial area of testes. F) Cholesterol
F Compound that serves as precursor to steroid hormones. G) Sertoli
N Ovarian or testes glycoprotein that inhibits FSH secretion. H) Estrogen
I Pituitary hormone responsible for ovulation. I) LH
C Rate a hormone is cleared from the circulatory system determines its? J) Nucleus
E When this structure is stimulated it initiates ejaculation in most mammals. K) Phermones
D The general term used for regulation of hormone secretion is called? L) Cervix
X Procedure used to determine pregnancy status in the urine of women. M) Albert
B Common name of cellular mass that comprises 70% of testis N) Inhibin
S Lab procedure used to measure hormone concentrations in blood. O) Sphenoid
M Who is the mascot of the Gator Nation? P) GnRH
V Suspensory tissue surrounding the reproductive tract. Q) Leydig
J Cellular location of receptors for steroid hormones. R) Seminiferous tubules
P Hypothalamic hormone that initiates the LH surge. S) Radioimmunoassay
R Specific anatomical structure in testes where spermatogenesis occurs T) Vas Deferens
O Name of bone that houses and protects the pituitary U) Tertiary follicle
T Structure that moves sperm from epididymis to the ampulla V) Broad ligament
G Somatic cells that serve as nurse cells for sperm W) Prostaglandins
K Air borne chemical messengers secreted by vestibular glands X) ELISA
A Cellular location of receptors for protein hormones. Y) Ovulation fossa
Exam 1 (100 pts: Feb. 13, 2009) Name: _______________________________
True or False. Circle the correct answer. If a phase or word is underlined it is the central focus of the statement and
cannot be changed to make the statement true. If you answered a question false you must provide a brief but specific statement that would correct the statement to receive credit (3 pts each).
- T F The bull and boar have a penis that contains expandable tissue with minimal connective tissue known as a vascular penis ; whereas, the stallion has a penis with non-expendable dense connective tissue known as a fibroelastic penis.
The stallion has a vascular penis and the bull & boar have a fibroelastic penis.
- T F The three primary functions of the epididymis are embryo development, sperm storage, and secretion of oxytocin.
The functions as storage, transport, and maturation of sperm
T F Progesterone is known as the hormone of pregnancy and some of its functions include preventing the expression of estrus, blocking myometrial contractions during pregnancy, and stimulation of uterine secretions in the early pregnant animal.
T F From an anatomical perspective, the uterus is composed of three layers including the mesoovarian, mesosalpinx, mesometrium.
The layers are the endometrium, myometrium, perimetrium
- T F The penis of the cat is unique in that it has a bulbous glandis and an os-penis or baculum.
The penis of the dog contains these structures.
T F In the cat, dog, and cow, semen is deposited in the fornix vagina. The sperm travels through the cervix, enters the uterine body, through the uterine horns, and ends up in the oviduct where fertilization occurs.
T F The primary steroid hormone secreted by the follicle is progesterone; whereas, the primary steroid hormone secreted by the corpus luteum in estrogen.
The follicle secretes estrogen and the CL produces progesterone
- T F In general seminal plasma is secreted from the accessory sex glands , which consist of the prostate, cowpers gland, and seminal vesicles.
Exam 1 (100 pts: Feb. 13, 2009) Name: _______________________________
d. Please explain how the hormone produced by the endocrine gland in question 3a stimulates the release of hormones from the section of the pituitary in question 3c when it is known that the two endocrine glands are not physically connected (3 pts).
The hypothalamus and anterior pituitary are connected by the Hypothalamic-hypophyseal-portal blood system, which allows hormones to be transported to the anterior pituitary.
e. Name the hormone synthesized and secreted from the paraventricular nucleus and indicate the section of the pituitary where it is stored and eventually secreted into the blood stream (2 pts)?
Oxytocin is secreted from the posterior pituitary
f. Please explain how the hormone released from the paraventricular nucleus travels to the section of the pituitary in question 3e (2 pts).
Oxytocin is secreted from the hypothalamus and travels down nerve axons that stimulate the release of oxytocin from the posterior pituitary.
g. Please provide two distinctly different physiological functions in the female that the hormone listed in question 3f has (3 pts)
Stimulates smooth muscle contractions in reproductive tract (uterus oviduct), promotes PGF 2 α synthesis from uterus, and initiates milk ejection from mammary gland.
- The strength of a hormone’s action on a target tissue is driven primarily by four factors. Two of these factors are associated with the hormone itself and two are associated with receptor for the hormone. Please list the four factors in the appropriate blanks below (4 pts).
a. Hormone: pattern and duration of the hormone secretion and (or) half-life of the hormone
b. Receptor: affinity (binding ability) and density (number)
- Please answer the following questions as they relate to the anatomy and physiologically of the intact male dog.
a. From a fertility standpoint, what is the primary function of testosterone on the testes (2 pts)?
Stimulates and maintains spermatogenesis
b. Why can the intact male dog produce seminal fluid whereas the castrated male dog can’t (2 pts)?
Testosterone is necessary for the development of the accessory sex glands. Without them the glands do not develop and there is no seminal fluid produced.
c. What role does testosterone have on the phenotype and behavior of the intact male dog (3 pts)?
Stimulates the 2° sex characteristics of the male (makes it look like a male), enhances muscle development, maintains libido, and maintains reproductive tract function so the dog can ejaculate.
