Reproduction Plickers questions
What is a freemartin?
Androgenized female
A hormone/molecule binds to a receptor and blocks the binding of an agonist. There is no biological effect. What type of hormone action is this?
Antagonist
What structure/molecules are all the steroid hormones derived from?
Cholesterol
How does the PPP cool the testes?
Countercurrent heat exchange
What is the name of the muscle in the scrotum that aids in temperature regulation?
Cremaster
The pituitary gland secretes LH & FSH directly into the bloodstream for them to act on their target tissues (ovaries and testes primarily). What type of cellular communication can this be classified as?
Endocrine
Which of the following best describes a permissive hormone action?
Estradiol in the uterus stimulates progesterone receptor production in the uterus
During late pregnancy and early parturition, mammary glands in the udder produce milk that is secreted outside the body. This is an example of what kind of cellular secretion?
Exocrine
True or False. Reproductive traits are highly heritable
False
True or false. Female mammals continuously produce follicles throughout their post-natal life
False
True or false. In Freemartins the paramesonephric ducts completely dissolve
False
True or false. The Cremaster muscle is capable of sustained contraction
False
The sex of an organism as determined by its genes is known as what?
Genotypic sex
The term 'animalcules' was used by which scientists to describe which tissue?
Hamm and Leewenhook, Sperm
What is the name of the cluster of cells that gives rise to the germ layers?
Inner cell mass
What are the two unique cell types found in the testes?
Leydig and Sertoli
Which duct system gives rise to the male reproductive system?
Mesonephros
The female reproductive tract arises from what primitive tissue?
Paramesonephric ducts
Which duct system gives rise to the female reproductive tract?
Paramesonephros
What major endocrine gland is involved in regulating production?
Pituitary
Cells of the trophectoderm give rise to what tissue?
Placenta
Cells that have a dedicated lineage, but may still give rise to a variety of cells within that lineage are known as:
Pluripotent
Epigenesis/Cell Theory
Proved by Schleiden and Schwann Stated that new individuals form from one to many cells We now know "in between" parts
What processes are controlled by the endocrine system?
Reproduction, growth, and development
What is not a characteristic of endocrine glands?
Secrete directly into the epithelium
What is the ideal scrotal temperature for optimum sperm production?
Slightly lower than body temperature
Who is considered the 'father' of artificial insemination?
Spallanzani
What is not a recent advancement of the science of reproduction?
Sperm fertilized by egg
What is the goal of reproduction?
To survive
True or false. Eicosanoids are classified as hormones
True
True or false. The germ layers are the ectoderm, mesoderm and endoderm
True
True or false. The pancreas is considered an endocrine gland
True
What is the name of the scrotal layer that regulates temperature of the scrotum by moving the testes closer or further from the body, depending on temperature?
Tunica dartos
What is the scrotal layer that is described as a mesh like structure of smooth muscle?
Tunica dartos
Who is considered the "father of modern embryology" for his discovery of the blastula stage of early development as well as discovery of the notochord
Von Baer
Why do sperm need a cryo-protectant when frozen?
Water crystals pierce the cells when it freezes
Who won the Nobel Peace Prize in 1989 for their discovery of the RIA (radioimmunoassay technique)?
Yalow
