Question Question 1 Which of the following is true regarding endocrine glands? Answer As the body matures endocrine glands develop from specialized exocrine glands. Endocrine glands empty their products into a duct. Examples of endocrine glands include sweat glands and salivary glands. Endocrine glands are connective tissues that are specialized to produce and secrete a product. Endocrine glands produce and secrete hormones. Question 2 One of the most common ways to get information out to a wide audience in the least amount of time regarding “hot” topics in science is by using Answer peer reviewed journals0 science magazines the Discovery channel on television general interest news magazines or newspapers Books Question 3 Which of the following is not true regarding nucleotides? Answer An RNA nucleotide could be made up of ribose a phosphate and cytosine. DNA nucleotides contain deoxyribose; RNA nucleotides contain sucrose. There are four different DNA nucleotides. RNA nucleotides are assembled into RNA by the process of dehydration synthesis. Nucleotides are bonded together by covalent bonds between the sugars and the phosphates. Question 4 Which enzyme is a potentially useful indicator of certain types of cancers? Answer antioxidants trypsin amylase Telomerase DNAse I Question 5 Which of the following is a true statement? Answer Molecules are considered to be the smallest unit capable of exhibiting all the characteristics of life. Cells arise spontaneously from nonliving chemical elements. All living things are made up of at least one cell. Cells are incapable of maintaining homeostasis because they are too small. Organisms composed of many cells are unicellular. Question 6 Which of the following is not true regarding the regulation of blood flow? Answer Blood flow to localized areas is adjusted to meet the requirements of that particular tissue. In order to maintain homeostasis arterial blood pressure is allowed to fluctuate so that the oxygen/nutrient demands of various tissues are met. A constant blood pressure in the arteries is maintained through the regulation of heart rate and force of contraction. Regulating the diameter of systemic arterioles helps to maintain constant blood pressure. Baroreceptors are important in the regulation of blood pressure. Question 7 Most surveillance systems are passive and disease specific. Answer True False Question 8 Which of the following is not true regarding the immune response? Answer The immune response uses chemical and phagocytic cells to destroy foreign cells. Once initiated the immune response provides protection for the entire body. The key to immune response is the ability of the components involved to be able to distinguish between the body cells and foreign cells. The immune response involves the activities of proteins cells and the lymphatic system. The immune response involves the ability to “remember” exposures to pathogens in order to increase the rate of response upon subsequent infections by that pathogen. Question 9 The best definition of a poison is: Answer any chemical that is foreign to the body any substance that can potentially produce toxicity any substance that if present in the body in relatively small amounts that may produce serious injury any poisonous substance produced by an organism Question 10 About 55% of whole blood is ____ which is mostly made up of water. Answer plasma hemoglobin white blood cells clotting proteins Hematocrit Question 11 Disulfide bonds are most characteristic of which of the following levels of protein structure? Answer primary secondary tertiary quaternary none of the above Question 12 Skin becomes less flexible as individual ages because of a decrease in the number of protein fibers associated with the dermis. Answer True False Question 13 Red-green color blindness is an X-linked recessive disorder. Assume that mom is a carrier and dad is color blind. What is the chance that their son will inherit red-green color blindness? Answer 0% 25% 50% 75% 100% Question 14 Human cells with the exception of the gametes reproduce by mitosis. Answer True False Question 15 A student noticed that every time he smelled a certain perfume in the hallway it reminded him of his mother. This is due largely to the activity of the limbic system. Answer True False Question 16 Bulk movement of water across plasma membranes and the exchange of oxygen from blood into cells are similar in that the method of transport is by Answer facilitated transport. endocytosis. diffusion. active transport. sodium-potassium pumps Question 17 Excitatory neurotransmitters encourage the generation of new electrical impulses by Answer stimulating saltatory conduction. stimulating depolarization of postsynaptic neurons. inhibiting postsynaptic neurons from repolarizing. inhibiting presynaptic neurons from depolarizing. stimulating depolarization of presynaptic neuorons Question 18 Which of the following is not true regarding pneumonia? Answer It is caused by the bacterium Mycobacterium tuberculosis. Symptoms include fever cough and shortness of breath. It ranks among the top 10 causes of death in North America. It can be caused by a viral infection. Symptoms result from inflammation of the lungs and secretion of excess fluid by the alveoli. Question 19 Vasoconstriction causes an increase in the diameter of blood vessels thus causing an increase in blood flow to the tissues. Answer True False Question 20 Dead and injured white blood cells are removed from circulation by the: Answer spleen. tonsils. red bone marrow. kidney. Thymus. Question 21 Which of the following membranes lines the airways and digestive tract? Answer serous cutaneous membranous synovial Mucous Question 22 When the amount of thyroxine in the body increases the basal metabolic rate of the body also increases. Answer True False Question 23 Which of the following would result in passive immunity? Answer vaccination past occurrence of an infection or disease production of memory cells movement of antibodies across the placenta from mother to child stimulation of T cells and B cells by an antigen Question 24 Restriction enzymes are used in genetic engineering to cut DNA between specific base pairs in a DNA strand resulting in DNA segments that are then used for further study and analysis. Answer True False Question 26 Vasoconstriction and vasodilation of blood vessels are caused by a number of factors including: Answer emotions closing/opening of precapillary sphincters hormones nervous stimulation all of the above Question 27 In some cases why doesn’t the immune system recognize and destroy a cancer? Answer Cancer cells that produce abnormal antigens sometimes shed them. Cancer cells have less surface receptors needed for proper activation of T cells. Cancer cells have enough “self” surface markers as to be identified as normal cells. Cancer cells develop from normal cells that cannot regulate cell division. all of the above Question 28 Which term describes an active orderly process for eliminating genetically damaged or dead cells without inflammatory reactions? Answer Necrosis Apoptosis Mitosis Fibrosis Question 29 When a blood pressure is taken by a medical professional the pressure in the main veins is recorded. Answer True False Question 31 Which of the following is an oligosaccharide? Answer glucose DNA maltose starch Ribose Question 32 Which of the following is not true regarding arrhythmias? Answer One type known as ventricular fibrillation is the leading cause of cardiac death in people who are otherwise in good health. An artificial pacemaker can sometimes be used to correct this condition. All forms of arrhythmias are considered serious medical conditions. Arrhythmias can occur when heart muscle becomes damaged. An ECG can be used to diagnose this condition. Question 33 Hemolytic disease of the newborn could result from which of the following situations? Answer mom is Rh+; fetus is Rh- mom is Rh-; fetus is Rh+ mom is Rh+; fetus is Rh+ mom is Rh-; fetus is Rh- either C or D Question 34 Cyanide is the most acutely toxic substance known. Answer True False Question 35 The first successful treatment of a human genetic disorder through gene therapy was with a disorder known as: Answer severe combined immunodeficiency disease. diabetes mellitus. human dwarfism. hemophilia. acquired immune deficiency syndrome. Question 36 Which of the following best explains how water moves freely across a plasma membrane? Answer Because of the charges on phospholipids water moves directly through the phosopholipid bilayer. Water is brought into the cell by endocytosis and released by exocytosis. Because water is so important to a cell it is actively transported across the membrane. Water moves through protein-lined channels in the plasma membrane. The passage of water across a plasma membrane requires facilitated transport. Question 37 Muscle cells store energy in the form of ________ until it is used for the production of ATP. Answer glucose starch glycogen fat Sucrose Question 38 The more buffers present in a body fluid the less stable the pH will be. Answer True False Question 39 Which of the following is not true of influenza viruses? Answer All strains of influenza virus are highly pathogenic. The influenza virus genome contains RNA rather than DNA. Nutritional factors affect the ability of the influenza virus to cause infection. The relationship between virus and host depends partially on haemaglutinin present on the viral surface. Question 40 Which of the following diseases is caused by a virus? Answer rabies Lyme disease syphilis toxic shock syndrome Tuberculosis Question 41 Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice? Answer Cranberry juice contains chemicals that kill viruses and bacteria. The increased volume of fluid in the bladder causes bacterial cells to burst as they absorb the excess fluid. Cranberry juice makes the urine more acidic decreasing the rate at which microorganisms can grow and reproduce. Cranberry juice increases the efficiency of urine production by the kidneys. all of the above Question 42 Pharmaceutical companies prefer to genetically engineer large animals with human genes because it may be possible to obtain large amounts of the resulting protein from the animals’: Answer milk. fur. blood. meat. Bones. Question 43 Not only does science involve gaining knowledge about the natural world it also involves the process of obtaining that knowledge. Answer True False Question 44 Translocation occurs when a piece of chromosome breaks off and is lost. Answer True False Question 45 Which of the following best describes an angiogram? Answer an x-ray picture of blood vessels a recording of heart sounds use of a balloon to widen an artery a sensation of pain in the chest associated with poor blood circulation to the heart a recording of the electrical activity of the heart Question 46 Which of the following body fluids is not known to transmit HIV from human to human? Answer blood semen saliva vaginal fluid breast milk Question 47 An increased risk for cardiovascular health problems is associated with: Answer an elevated level of hemoglobin. high blood levels of HDLs. decreased production of albumins. high blood levels of LDLs. low blood levels of LDLs. Question 48 The process by which the blastocyst becomes buried within the endometrial lining of the uterus is: Answer fertilization. implantation. morphogenesis. differentiation embryonic development. Question 49 Which of the following is true regarding lung cancer? Answer Symptoms include chest pain chronic cough and wheezing. Lung cancer may be treated with surgery chemotherapy and/or radiation. This type of cancer typically takes many years to develop. Problems associated with lung cancer include inadequate exchange of gases in the alveoli and impairment of blood flow in the pulmonary blood vessels. all of the above Question 50 State-level data on seasonal influenza are general qualitative reports from state and territorial epidemiologists summarizing weekly influenza activity rather than specific numbers of infections. Answer True False
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