QUIZ 2 Flashcards
Refers to the physical position where the male and female frogs are directly in contact
Amplexus
Biological process by which a larval amphibian (tadpole) transforms into an adult frog. This developmental transition involves significant morphological, physiological and biochemical process
Metamorphosis
A diagram or model that shoes the developmental fate of different regions of an embryo, indicating which cells or areas will give rise to specific tissues and organs as developmental progresses
Fate Maps
A deep closed pit located anterior and a little dorsal to the sucker of the tadpole
Stomodoeum
In deutrerostomes (vertebrates), the ____ gives rise to the intestines and other digestive tract
Archaenteron
Deuterostomes - Vertebrates: _____________- Arthropods/Molluscs
Protostome
Opening of the Archaenteron
Blastopore
Subdivision of somite that forms the dermis, the connective tissue of the skin
Dermatome
Subdivision of somite that forms the vertebrae, ribs and parts of the skull by giving rise to cartilage and bone
Sclerotome
Subdivision of somite that forms the skeletal muscles of the body
Myotomes
The common exit for digestive, urinary, and reproductive system
Cloaca
This hormone primarily regulates frog metamorphosis
Thyroid
The active thyroid hormone that triggers tissue remodeling, apoptosis (e.g., tail resorption), limb growth, and organ development
T3
The inactive form of thyroid hormone, which is converted into the active form
T4
The ____ form the gill clefts which give rise to external gills for respiration of tadpoles
Pharyngeal pouch
Are also known as leukocytes, relatively delicate cells and can sometimes rupture during collection or processing
Neutrophils
They have a high nuclear to cytoplasmic ratio relative to large epithelial cells, a round nucleus, and blue cytoplasm
Small Epithelial Cells
They are round to polygonal and may have irregular, jagged, or angular borders. Cells can have some degree of keratinization and possess nuclei that may be intact, degenerate or pyknotic
Large Epithelial Cells
Cells are also known as sqaumes or “cornflakes” They are aged cells and are characterized by an abundant blue to sky blue cytoplasm with jagged or angular edges
Anucleud Keratinized Epithelial Cells
Short stage, lasting an average of less than 24 hr in mice. The predominant feature of this stage is the presence of small, round, nucleated epithelial cells of relatively uniform appearance and size
Proestrus
Characterized by a combination of anucleated keratinized epithelial cells and neutrophils. In mice nucleated cells may appear occasionally throughout this stage
Metestrus
The longest stage of the estrus cycle with an average duration of48-72 hr in mice
Diestrus
If leukocytes are a dominant feature, or consistently observed, the stage is either ____ or ___
Metestrus & Diestrus
If leukocytes are rare to absent this is either ___ or ___
Proestrus & Estrus
