Microtubules are protein filaments that have a tubular structure and, together with actin and intermediate filaments, form the cytoskeleton of eukaryotic cells. They stabilize the cell and also participate in transport and movement within the cell. What are microtubules? Microtubules are tubular polymers whose protein structures are about 24nm in diameter. Together with other filaments, … Microtubules: Structure, Function & Diseases
Archaea, or primordial bacteria, are cellular life forms in addition to the other groups of bacteria and eukaryotes. In the late 1970s, the archaea were described and classified as a distinct group by microbiologists Carl Woese and George Fox. What are archaea? Archaea are single-celled organisms that possess DNA (deoxyribonucleic acid) in the form of … Archaea: Infection, Transmission & Diseases
Nuclear division (mitosis) of cells of eukaryotic organisms with replication of DNA can be divided into four main phases. The second main phase is called metaphase, during which chromosomes contract in a spiral pattern and position themselves in the equatorial plane at approximately equal distances from both opposite poles. The spindle fibers, starting from both … Metaphase: Function, Tasks, Role & Diseases
Spermiogenesis is the term used to describe the remodeling phase of spermatids formed by spermatogenesis into mature spermatozoa capable of fertilization. During spermiogenesis, spermatids lose much of their cytoplasm and the flagellum forms, which serves active locomotion. On the head containing the nuclear DNA, opposite the point of attachment of the flagella, the acrosome is … Spermiogenesis: Function, Tasks, Role & Diseases
Juberg-Marsidi syndrome is a hereditary disorder associated with mental retardation and physical disorders. The syndrome is rare, with one case per million births. It is caused by a mutation in the ATRX gene. What is Juberg-Marsidi syndrome? Juberg-Marsidi syndrome, also called Smith-Fineman-Myers syndrome or X-linked mental retardation-hypotonic facies syndrome I, is a hereditary disorder. It … Juberg-Marsidi Syndrome: Causes, Symptoms & Treatment
Cell proliferation is a biological process in which the cell grows on the one hand and divides on the other. Cell division is also called cytokinesis and completes the preceding mitosis, nuclear division. This process is used for the reproduction of cells in the human body. What is cell proliferation? Cell proliferation is a biological … Cell Proliferation: Function, Tasks, Role & Diseases
The human body has billions of cells. These are small building blocks responsible for maintaining and building tissues and organs. In order for cells to maintain, divide or destroy themselves, a cell cycle takes place. The cell cycle in the organism consists of cell growth and division. Cell growth concerns the increase in size and … Cell Growth: Function, Tasks, Role & Diseases
The cell cycle is a regularly occurring sequence of different phases in a body cell. The cell cycle always begins after a cell divides and ends after the next cell division is completed. What is the cell cycle? The cell cycle always starts after a division of the cell and ends after the completion of … Cell Cycle: Function, Tasks, Role & Diseases
The karyoplasm is the name given to the protoplasm within cell nuclei, which differs from the cytoplasm particularly in its electrolyte concentration. For DNA replication and transcription, the karyoplasm provides an optimal environment. In diabetic patients, nuclear inclusions of glycogen may be present in the karyoplasm. What is karyoplasm? Cell nuclei are located in the … Karyoplasm: Structure, Function & Diseases
In the past, especially in the German-speaking world, the term gender referred exclusively to the biological differences between men and women. Meanwhile, the need to include psychological and social aspects of gender has been recognized. In the context of gender research, the transitional forms of gender are increasingly being considered. Increasingly, the picture is emerging … Gender: Function, Tasks, Role & Diseases
One is tall, the other is shorter. Asians are on average smaller than Europeans and women smaller than men. Also, some people suffer from tall or dwarfism due to a genetic defect. Thus, it can be said that overall body size depends on very different factors such as age, gender, geographical origin and life circumstances. … Body Size: Function, Tasks, Role & Diseases
Aneuploidy screening is used to detect numerical chromosomal aberrations in embryos created in vitro and intended for implantation. It is a cytogenetic test that can only detect numerical aberrations of specific chromosomes. Aneuploidy screening thus represents a form of preimplantation genetic diagnosis (PGD). What is aneuploidy screening? Aneuploidy screening is used only in in vitro … Aneuploidy Screening: Treatment, Effects & Risks
