相关实验视频
Updated: Jul 20, 2025
04:37
Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
Published on: May 12, 2019
15.7K
两动物和爬行动物的甲状腺和繁殖
1Department of Integrative Physiology, University of Colorado, Boulder, Colorado, USA.
概括
甲状腺激素在两动物和爬行动物的繁殖中起着复杂的作用,有证据表明,根据生命阶段,甲状腺激素具有积极和消极的影响. 需要进一步的研究才能充分理解这种复杂的关系.
科学领域:
- 进行比较的内分泌学.
- 生殖生物学 生殖生物学
- 类学 类学 类学 类学
背景情况:
- 甲状腺对两动物和爬行动物的繁殖的影响已被研究了一个多世纪.
- 现有的研究对甲状腺激素的作用提出了相互矛盾的发现,表明甲状腺激素与生殖过程有积极和消极的关联.
- 一个细微的理解需要检查基因调节和生理反应在整个下丘脑-垂体-腺轴.
研究的目的:
- 阐明甲状腺激素与两动物和爬行动物的生殖功能之间的复杂关系.
- 为了研究甲状腺激素对基因表达和基因表达和基因表达和基因表达和基因表达和基因表达的作用.
- 为了将甲状腺活动与上腺皮质激素水平,生殖成功和代谢状态相关联.
主要方法:
- 对响应甲状腺激素的基因激活和抑制模式的分析.
- 评估甲状腺激素缺失对生殖参数的影响.
- 监测上腺皮质激素活性和代谢率.
- 评估与内分泌功能相关的整体生殖性能.
主要成果:
- 这项研究强调了甲状腺激素在两动物和爬行动物的繁殖中的双重作用.
- 有证据表明,甲状腺激素可以对生殖成功产生有益和有害的特定阶段的影响.
- 这里强调了甲状腺激素,下丘脑-垂体-腺轴和代谢过程之间的复杂相互作用.
结论:
- 甲状腺激素对两动物和爬行动物的繁殖产生复杂的,往往取决于阶段的影响.
- 综合基因表达,内分泌功能和生理参数的全面研究对于完全理解至关重要.
- 未来的研究应该集中在这些外热脊椎动物中控制甲状腺生殖轴调节的多方面的相互作用上.
相关概念视频
01:20Synthesis and Regulation of Thyroid Hormones
4.7K
Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
4.7K
01:23The Thyroid Gland
4.0K
The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
4.0K
01:18Functions of Thyroid Hormones
2.8K
The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
2.8K
02:27Background and Environment Affect Phenotype
6.6K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.6K
00:59The Parathyroid Glands
2.2K
The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
2.2K
01:51Lampbrush Chromosomes
7.9K
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
7.9K