Q: Q: What term is also known as the contact activation pathway? Read this paragraph and choose the correct option from the provided answers: Intrinsic Pathway The intrinsic pathway (also known as the contact activation pathway) is longer and more complex. In this case, the factors involved are intrinsic to (present within) the bloodstream. The pathway can be prompted by damage to the tissues, resulting from internal factors such as arterial disease; however, it is most often initiated when factor XII (Hageman factor) comes into contact with foreign materials, such as when a blood sample is put into a glass test tube. Within the body, factor XII is typically activated when it encounters negatively charged molecules, such as inorganic polymers and phosphate produced earlier in the series of intrinsic pathway reactions. Factor XII sets off a series of reactions that in turn activates factor XI (antihemolytic factor C or plasma thromboplastin antecedent) then factor IX (antihemolytic factor B or plasma thromboplasmin). In the meantime, chemicals released by the platelets increase the rate of these activation reactions. Finally, factor VIII (antihemolytic factor A) from the platelets and endothelial cells combines with factor IX (antihemolytic factor B or plasma thromboplasmin) to form an enzyme complex that activates factor X (StuartPrower factor or thrombokinase), leading to the common pathway. The events in the intrinsic pathway are completed in a few minutes. Choices: - central pathway - internal pathway - identical pathway - intrinsic pathway A:
A: intrinsic pathway

Q: Q: What kind of reproduction, in general, relies on sets of cells that are precursors for eggs and sperm? Read this paragraph and choose the correct option from the provided answers: Choices: - binary fission - fusion - asexual - sexual A:
A: sexual

Q: Q: The point in front of a mirror where the reflected rays intersect is known as what? Read this paragraph and choose the correct option from the provided answers: Some mirrors have a curved rather than flat surface. Curved mirrors can be concave or convex. A concave mirror is shaped like the inside of a bowl. This type of mirror forms either real or virtual images, depending on where the object is placed relative to the focal point. The focal point is the point in front of the mirror where the reflected rays intersect. You can see how concave mirrors form images in Figure below and in the interactive animation at the URL below. The animation allows you to move an object to see how its position affects the image. Concave mirrors are used behind car headlights. They focus the light and make it brighter. They are also used in some telescopes. Choices: - reflective point - boundary point - periodic point - focal point A:
A: focal point

Q: Q: What two microorganisms have different membrane lipids? Read this paragraph and choose the correct option from the provided answers: Choices: - microsporidia and bacteria - mesozoic and bacteria - algae and bacteria - archaea and bacteria A:
A: archaea and bacteria