"Prothrombin" Natural Recordings by Native Speakers
A protein that helps in forming blood clots to stop bleeding when you are injured.
An official or chief clerk, especially in the United States, who assists a judge and keeps the records of a court.
Prothoracicotropic hormone (PTTH) refers to a peptide hormone produced by the brain of insects, particularly in the corpora cardaca of insects that undergo a complete metamorphosis. PTTH is released in response to a decrease in juvenile hormone levels, indicating that the larva has reached the end of its growth phase and is ready to transition to the pupal state, where it undergoes dramatic transformations en route to becoming the adult form.<br><br>PTTH acts on the prothoracic gland, stimulating it to produce ecdysone, a steroid hormone which initiates molting, a critical aspect of the process. In essence, PTTH is a hormone that effectively triggers the final stages of an insect's life cycle.
The prothorax is the middle segment of an insect's thorax, which is the section of the body behind the head and ahead of the abdomen. It bears most of the insect's legs and wings.
A protist is any eukaryotic microorganism that is not easily classified as an animal, plant, or fungus. Protists are typically single-celled and live in various aquatic environments, such as water, moist soil, or damp places. They can be autotrophic (producing their own food) or heterotrophic (obtaining their food by consuming other organisms). Protists are found in diverse shapes, sizes, and forms, and can be motile or sessile.<br><br>Examples of protists include:<br><br> Euglena (a single-celled organism that can move)<br> Amoeba (a single-celled organism that changes shape)<br> Paramecium (a single-celled organism that moves with cilia)<br> Protozoa (single-celled organisms that move and feed on other cells)<br> Diatoms (microalgae that form shells)<br> Slime molds (organisms that can form a single large cell)<br><br>Protists are lineages of eukaryotes that have not followed a major developmental trajectory called opisthokonts, which includes animals, fungi, and some protists.