Explain the roles of the hormones GnRH, FSH, and LH in the male and female reproductive systems
What will be an ideal response?
ANSWER: In both males and females, gonadotropin-releasing hormone (GnRH) is secreted by the
hypothalamus gland and acts on the pituitary gland to release follicle-stimulating hormone
(FSH) and luteinizing hormone (LH) into the bloodstream. In females, the target of FSH
and LH is the ovary. FSH stimulates primary oocytes to develop into secondary oocytes,
which become surrounded by a layer of cells and form a follicle. LH triggers ovulation and
subsequent formation of the corpus luteum from the remaining follicle cells. In males, the
target of the two gonadotropins is the testes. FSH stimulates Sertoli cells to secrete
molecules required for spermatogenesis while LH stimulates the Leydig cells to secrete
testosterone.
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The synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down their electrochemical gradient, is an example of _____
A) active transport B) an endergonic reaction coupled to an exergonic reaction C) a reaction with a positive ?G D) osmosis E) allosteric regulation
what proportion of the long-eared offspring will be homozygous for the long-eared allele?
A. 1/8 B. 1/4 C. 1/3 D. 1/2 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about monohybrid crosses? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Following uptake, transforming DNA becomes attached to a competence-specific protein that prevents it from nuclease attack until it reaches the chromosome
Indicate whether the statement is true or false.
Which of the following does NOT relate to cells of
the developing embryo? a. mitosis b. meiosis c. differentiation d. death e. growth