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Embryology Insights
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Embryology Insights
Embryology Insights
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1
Question
What is embryology?
Answer
The branch of biology concerned with the development of new organisms.
2
Question
What do embryologists track?
Answer
Reproductive cells (gametes) as they progress through fertilization, become a single-celled zygote, then an embryo, all the way to a fully functioning organism.
3
Question
How do evolutionary biologists use embryology?
Answer
As a means of comparing species, as the development of an organism can give many clues to its evolutionary history.
4
Question
How do scientists studying human embryology assist?
Answer
With women's reproductive health, and understand the broad scope of issues which can lead to developmental defects and malformations.
5
Question
What was Aristotle's contribution to embryology?
Answer
He first proposed the correct mechanism for the development of an embryo, suggesting animals form through epigenesis.
6
Question
What is epigenesis?
Answer
The process in which a single cell divides and differentiates into many tissues and organs of an animal.
7
Question
What is preformation?
Answer
The idea that the embryo was contained, small but fully formed, inside the sperm.
8
Question
What is the concept of 'homunculus' related to?
Answer
Preformationism, referring to the little man supposedly contained within the sperm.
9
Question
What did the preformation theory suggest about women?
Answer
That they were simply vessels to carry the growing child, and that girls came from the left testicle, while boys came from the right.
10
Question
What evidence disproved preformation?
Answer
The discovery of the ovum, or female sex cell, in 1827.
11
Question
What are epigenetic modifications?
Answer
Changes in gene function that are mitotically and/or meiotically heritable and that do not entail a change in DNA sequence. Generally comprise histone variants, posttranslational modifications of amino acids on the amino-terminal tail of histones, and covalent modifications of DNA bases.
12
Question
What is the germ layer theory?
Answer
The theory that a single cell becomes separate layers of cells as the early organism divides, with these layers giving rise to the rest of the organism.
13
Question
Who proposed the germ layer theory?
Answer
Karl Ernst von Baer and Heinz Christian Pander.
14
Question
What is descriptive embryology?
Answer
The morphological description of different embryonic stages in the ontogenetic development of individuals of different species.
15
Question
What is comparative embryology?
Answer
The study of how anatomy changes during the development of different organisms.
16
Question
What is evolutionary embryology?
Answer
The study of how changes in development may cause evolutionary changes and of how an organism's ancestry may constrain the types of changes that are possible.
17
Question
What is experimental embryology?
Answer
Studies that attempt to understand the various fundamental mechanisms in the development of different animals, such as fertilization, cleavage, gastrulation, embryonic induction, determination, and differentiation.
18
Question
What is chemical embryology?
Answer
Studies which employ various biochemical, biophysical, and physiological techniques for understanding embryological events at a molecular level.
19
Question
What is teratology?
Answer
The division of embryology and pathology that deals with abnormal development and birth defects.
20
Question
What is behavioral embryology?
Answer
The study of the early development of the nervous system and behavior with a view toward understanding how the formative periods of neural and behavioral development affect later stages of neurobehavioral ontogeny.
21
Question
What is the significance of embryology?
Answer
Understanding the intimate relation between structures in different organ systems, bridging the gap between prenatal development and related medical fields, developing knowledge concerning the beginnings of life, building an understanding of the causes of variations in human structure, and illuminating clinically oriented anatomy.
22
Question
What is embryology?
Answer
Embryology is the branch of biology concerned with the development of new organisms, tracking reproductive cells from fertilization to a fully functioning organism.
23
Question
How do evolutionary biologists use embryology?
Answer
Evolutionary biologists use embryology to compare species, as organism development can provide clues to evolutionary history.
24
Question
How do scientists studying human embryology assist with women's reproductive health?
Answer
They help understand issues that can lead to developmental defects and malformations.
25
Question
Who first proposed the correct mechanism for embryo development?
Answer
Aristotle first proposed the correct mechanism, suggesting animals form through epigenesis.
26
Question
What is epigenesis?
Answer
Epigenesis is the process in which a single cell divides and differentiates into many tissues and organs.
27
Question
What is preformation?
Answer
Preformation is an early theory suggesting the embryo was contained, small but fully formed, inside the sperm.
28
Question
What are epigenetic modifications?
Answer
Epigenetic modifications include histone variants, posttranslational modifications of amino acids on histone tails, and covalent modifications of DNA bases.
29
Question
What is the concept of 'Homunculus' related to?
Answer
Homunculus (little man) is related to the preformationism theory, suggesting a tiny, fully formed human existed within the sperm.
30
Question
Who supported Cell theory?
Answer
Aristotle supported cell theory.