Test your basic knowledge |

MCAT Biology 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A duct that carries spermatozoa from the epididymis to the ejaculatory duct






2. Diploid cells resulting from the activation of an oogoium; primary oocytes are ready to enter meiosis I. remember: cyte means ready to undergo meiosi






3. One of the main pancreatic proteases; it is activated (from chymotrypsinogen) by trypsin.






4. Maintenance of favorable internal conditions in a system despite flutuations in external conditions






5. T cells that can kill other cells. Almost all cytotoxic T cells are CD8 T cells. Cytotoxic T cells are important in host defense against viruses and other cytosolic pathogens - because they recognize and kill the infected cells.






6. The presence - or lack - of antigens on the surface of red blood cells that may cause a reaction between the blood of the mother and fetus - resulting in fetal anemia






7. Bone marrow of children and some adult bones that is required for the formation of red blood cells






8. A substance found in blood plasma that is the precursor to thrombin in the coagulation of blood






9. Minimal value that must be reached for the system to respond. Muscle fibers and neurons exhibit an all - or - none response - where the system initiates an action potential only if stimulus is sufficient.






10. Connects the left and right atria - allowing blood to flow directly from the right to the left side of the heart






11. Blood vessels that branch from the aorta and carry oxygen - rich blood to the heart muscle






12. Organ that completes the chemical digestion of food and absorbs the nutrients






13. Hormone that is released from the posterior pituitary in response to nerve impulses. This causes the distal and collecting tubules of the kidneys to reabsorb more water from the urinary filtrate.






14. Joint - lubricating fluid secreted by the synovial membrane






15. Growth Hormone Releasing Hormone released from hypothalamus via hypophyseal porthole stimulates somatotropins in anterior pituitary to release GH






16. A muscle that is connected at either or both ends to a bone and so move parts of the skeleton






17. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes






18. It is the lowermost layer of the integumentary system in vertebrates. Types of cells that are found in the hypodermis are Fibroblasts - Adipose Cells - and Macrophages






19. The body system that consists of the heart - blood vessels - and blood - and that carries needed substances to cells and carries waste products away from cells






20. Compounds made of a metal and nonmetal that are formed when acids and bases react






21. Of or relating to organisms (as green plants) that can make complex organic nutritive compounds from simple inorganic sources by photosynthesis






22. A normal blood protein produced by the liver - angiotensin is converted to angiotensim I by renin (secreted by kidney when blood pressur falls). Angiotensin I si further onverted to angiotensim II by ACE (angiotensin converting enzyme). Angiotensin I






23. Products of the first meiotic division - contain a haploid number of dyads - and undergo the second stage of meiotic division.






24. An enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot






25. Part of the adrenal gland that produces three major groups of steroid hormones called corticosteroids.






26. Two lobes joined by a central mass in the throat - inferior to the larynx - produces two major hormones.






27. Has low solubility in waterand high solubility in nonpolar organic solvents. They are hydrophobic and are excellent barriers seperating aqueous environments. Six major types.






28. Any substance (as a toxin or enzyme) that stimulates the production of antibodies






29. Bone marrow that is yellow with fat; found at the ends of long bones in adults






30. A blood protein essential to blood clotting. The conversion of fibrinogen to its active form (fibrin) is among the final steps in clot formation - and is triggered by thrombin.






31. Compounds that reduce the concentration of hydrogen ions in a solution






32. The cluster of cells inside the blastocyst that eventually develops into the embryo and some of the membranes that surround a mammalian embryo and fetus.






33. The two upper chambers of the heart - the receiving areas that pool incoming blood.






34. The volume of air inhaled and exhaled in a normal - resting breath - typically about 500 mL.






35. The most abundant type of white blood cell. Neutrophils are phagocytic and tend to self - destruct as they destroy foreign invaders - limiting their life span to a few days.






36. A regulatory protein that is a component of the thin filament. When calcium ions (Ca2+) bind to troponin - it undergoes a change in shape; this conformational change moves tropomyosin away from myosin - binding sites on actin molecules - and muscle c






37. Body cell; no egg or sperm






38. (Vh and Vl) variable N- terminal portions of the L and H chains that cause the differences between antibodies and combine to make up the antigen - binding region of the antibody.






39. Synthesised from ATP by adenylyl cyclase located on the inner side of the plasma membrane. Adenylyl cyclase is activated by a range of signaling molecules through the activation of adenylyl cyclase stimulatory G (Gs)- protein - coupled receptors and






40. Non - membrane bound organelles - large - ATP- dependant - a giant protein complex that recognizes and destroys proteins tagged for elimination by the small protein ubiquitin






41. Tiny hair - like projections of the cytoplasmic membrane located only in the small intestine to facilitate absorption by increasing surface area.






42. A vein in the umbilical cord; returns nutrient blood from the placenta to the fetus.






43. Found in the cytosol and contains - microfilaments - microtubules - and intermediate fibers. Gives the cell its shape and and anchor organelles. Functions in intracellular transport.






44. Colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended






45. Lighter - less strong bone that is found in the ends and inner portions of long bones; also called spongy bone






46. Cartilage cells - occupy spaces called lacunae






47. Head of the sperm that releases hydrolytic enzymes allowing it to enter the egg






48. An organelle containing its own DNA and ribosomes within a eukaryotic cell






49. Gel consisting of a network of insoluble protein fibers






50. Any of several quinones that function as electron - carrying coenzymes.