SCIN 132 Week 3 Quiz Questions and Answer Solutions | 100% GUARANTEED PASS.

SCIN 132 Week 3 Quiz Question 1 of 32 3.0/ 3.0 Points The pH of a liquid is a measure of its acidity or alkalinity. The normal range of pH of blood is: • A. 2.0 to 3.0 • B. 3.55 to 4.55 • ...

SCIN 132 Week 3 Quiz Question 1 of 32 3.0/ 3.0 Points The pH of a liquid is a measure of its acidity or alkalinity. The normal range of pH of blood is: • A. 2.0 to 3.0 • B. 3.55 to 4.55 • C. 4.35 to 4.45 • D. 5.0 to 6.0 • E. 7.45 to 7.55 Feedback: Good work; your answer is correct! Question 2 of 32 3.0 / 3.0 Points Which of the following is/are correct in describing thrombosis: • A. A condition characterized by excessive numbers of platelets that increases the risk for excessive clot formation, a condition known as thrombosis. • B. Thrombosis is a very common, always harmless condition that occurs in the body. • C. A thrombosis is always harmless because the thrombus which is formed always stays in a blood vessel precisely where it formed. • D. The blood stream contains several different anticoagulants that will result in the complete, normal breakdown of a thrombus. • E. Two of the above are correct. Feedback: Good work; your answer is correct! Question 3 of 32 3.0 / 3.0 Points What is meant by the term anemia? • A. There are only approximately four or five causes of anemia. • B. Anemia exists when the platelet count is so low that blood does not clot as quickly as it should. • C. Anemia is defined as a deficiency in the number of red blood cells and/or hemoglobin. • D. Anemia is said to exist when the total white blood cell is too low. • E. Anemia always results from some very simple cause. Feedback: Good work; your answer is correct! Question 4 of 32 3.0 / 3.0 Points Which of the following is/are important in the process named coagulation? • A. Neither an excess number of platelets nor having many too few platelets in the blood stream will cause any serious reaction. • B. Coagulation is a very simple and straight-forward series of only two or three steps. • C. A process which can reverse coagulation, named anticoagulation, can only occur when one or more medications are administered to the body. • D. Coagulation is a complicated cascade of reactions that result in the formation of a mesh of fibrin. • E. Coagulation can only occur in the presence of two or three different “clotting factors.” Feedback: Good work; your answer is correct! Question 5 of 32 0.0 / 3.0 Points In case an American needs an emergency blood transfusion, blood with the following blood type(s) can be given without fear of agglutination? • A. O+ • B. AB+ C. AB- • D. Blood with the same blood type as the person needing the transfusion. • E. Either C or D can be given. Feedback: A person who needs a blood transfusion should be given blood with the same ABO and Rh blood type if possible. Blood with the blood type O- can also be given because there are no antigens on the surface its erythrocytes. Part 2 of 7 - 12.0/ 15.0 Points Question 6 of 32 3.0 / 3.0 Points The specific fibers which spread the electrical impulse to the cardiac muscle fibers are called: • A. vagus nerve fibers • B. depolarizing sites C. AV fibers • D. Purkinje fibers • E. bundle branches Feedback: Good work; your answer is correct! Question 7 of 32 3.0 / 3.0 Points Which of the following statements are considered to be normal? • A. Normal heart rates vary from 30 beats/minute up to 200 beats/minute. • B. A heart rate less than or equal to 60 beats/minute is called bradycardia. • C. A heart rate greater than or equal to 100 or 120 beats/minute is called tachycardia. D. A person’s heart rate will change depending on the needs of the body. • E. B, C, and D are all correct. Feedback: Good work; your answer is correct! Question 8 of 32 3.0 / 3.0 Points The period of time that begins with contraction of the atria and ends with ventricular relaxation is known as: • A. the cardiac cycle. • B. the P-wave. • C. diastole. • D. systole. E. an ECG. Feedback: Good work; your answer is correct! Question 9 of 32 3.0 / 3.0 Points Which of the following statements about the internal structure of the heart is/are correct? • A. The mitral valve is a bicuspid valve. • B. The mitral valve is located between the left atrium and the left ventricle. • C. The aortic valve is one of the semilunar valves. • D. The tricuspid valve is located between the vena cavae and the right atrium. • E. A, B, and C are correct. Feedback: Good work; your answer is correct! Question 10 of 32 0.0 / 3.0 Points Which of the following statement(s) is (are) true? • A. The force the heart must overcome in order to pump blood is known as the its stroke volume. • B. The term preload refers to a tension, or pressure, that the left ventricle must develop in order for the heart to function properly. • C. The preload and afterload are the primary factors that cause the heart rate to change. • D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert. • E. Both C and D are true. Feedback: Contractility refers to the force of the contraction of the heart muscle. Part 3 of 7 - 15.0/ 18.0 Points Question 11 of 32 0.0 / 3.0 Points Cardiac output equals: • A. Systolic pressure plus diastolic pressure • B. Heart rate • C. Blood leaving one ventricle during one beat of the heart. • D. Stroke volume • E. Blood flow through the entire vascular system Feedback: Blood flow through the entire vascular system is cardiac output. Question 12 of 32 3.0/ 3.0 Points Which of the following does not play a role in blood pressure? • B. Blood vessel diameter • C. Cardiac output • D. Peripheral resistance • E. All of the above play a role in blood pressure. Feedback: Good work; your answer is correct! Question 13 of 32 3.0 / 3.0 Points is a condition where the heart is beating over 100 beats per minute. • A. Bradycardia • C. Tachycardia • D. Arrhythmia • E. Nodal Block Feedback: Good work; your answer is correct! Question 14 of 32 3.0 / 3.0 Points The exchange of substances between the blood vessels and the surrounding tissues can only happen in the . • A. Veins • B. Arterioles • D. Venules • E. Capillaries Feedback: Good work; your answer is correct! Question 15 of 32 3.0 / 3.0 Points These control the blood flow through a capillary bed. • A. Precapillary sphincters • B. Vasorum • C. Thoroughfare channel • E. AV values Feedback: Good work; your answer is correct! Question 16 of 32 3.0 / 3.0 Points The amount of blood pumped by either ventricle in one minute is called. • A. Cardiac output • B. Stroke volume • C. End systolic volume • D. Systolic volume • E. Starling output Feedback: Good work; your answer is correct! Part 4 of 7 - 15.0/ 18.0 Points Question 17 of 32 0.0 / 3.0 Points The inflammatory response does not: • A. Replaces damaged tissue with healthy tissue • B. Prevents the spread of disease to surrounding tissues • C. Starts the repair process of the tissue • D. Disposes of the cellular debris • E. The inflammatory response does all of the above. Feedback: a. The inflammatory response does not replace damaged tissue. Question 18 of 32 3.0 / 3.0 Points Cancer cells and virus cells can be killed by • A. Antibodies • B. Phagocytes • C. T lymphocytes • D. Eosinophils • E. Natural Killer Cells Feedback: Good work; your answer is correct! Question 19 of 32 3.0/ 3.0 Points The only antibodies that can cross the placenta are the . • B. IgG • C. IgD • D. a. IgA • E. IgM Feedback: Good work; your answer is correct! Question 20 of 32 3.0 / 3.0 Points The white pulp area in the spleen contains large amounts of . • A. Lymph • C. Red blood cells • D. Platlets • E. Foam cells Feedback: Good work; your answer is correct! Question 21 of 32 3.0 / 3.0 Points Part of the second line of defense includes: • A. Platlets • B. Phagocytes • D. Sebum on the skin • E. Cilia Feedback: Good work; your answer is correct! Question 22 of 32 3.0 / 3.0 Points The largest collection of lymphoid tissue in an adult is in the . • A. tonsils • B. spleen • C. Liver • E. thymus Feedback: Good work; your answer is correct! Part 5 of 7 - 18.0/ 21.0 Points Question 23 of 32 3.0 / 3.0 Points When multiple stimuli were applied at 20 stimuli/sec in the simulation, . • A. atrial contractions completely disappeared • B. triplets representing three ventricular contractions occurred • C. extrasystoles were produced • D. fused tetanus occurred Feedback: Correct! Question 24 of 32 3.0 / 3.0 Points Excessive vagal stimulation of the heart will result in . • A. an increase in heart rate • B. an increase in the force of contraction • C. a decrease in the force of contraction • D. a decrease in heart rate and, eventually, a temporary cessation of the heartbeat Feedback: Correct! Question 25 of 32 3.0 / 3.0 Points Skeletal muscle is capable of which of the following? • A. autorhythmicity • C. fused tetanus • D. wave summation and fused tetanus • E. wave summation, fused tetanus and autorhythmicity Feedback: Correct! Question 26 of 32 3.0 / 3.0 Points The total refractory period of cardiac muscle . • A. is shorter than the total refractory period for skeletal muscle • B. is about the same as the total refractory period for skeletal muscle • D. is longer than the contraction of cardiac muscle Feedback: Correct! Question 27 of 32 0.0 / 3.0 Points Which of the following will cause a decrease in heart rate? • A. parasympathetic nervous system stimulation • B. sympathetic nervous system stimulation • C. somatic nervous system stimulation • D. none of these will slow heart rate Feedback: Learning Objective: Describe the effects of the sympathetic and parasympathetic divisions of the autonomic nervous system on heart rate. Please review Lab Exercise 6, Activity 2. Question 28 of 32 3.0 / 3.0 Points Research shows that in the absence of neural and hormonal influences, the sinoatrial (SA) node generates action potentials at a frequency of about 100 times per minute. However, the resting heart rate is about 70 beats per minute. What would the approximate heart rate be if the vagus nerve were severed? • A. about 70 beats per minute • B. about 100 beats per minute • C. faster than 100 beats per minute • D. slower than 70 beats per minute Feedback: Correct! Question 29 of 32 3.0 / 3.0 Points The repolarization of cardiac muscle is due to . • A. potassium entering the cell • B. sodium entering the cell • C. sodium exiting the cell • D. potassium exiting the cell Feedback: Correct! Part 6 of 7 - 8.0/ 8.0 Points Answer the following question in your own words without using any resources. Your answer should be written in complete sentences using correct grammar, spelling, and terminology. Question 30 of 32 4.0/ 4.0 Points Define the term "extrasystole." Extrasystole is commonly known as a skipped heart beat or palpitation. Feedback: Learning Objective: Define extrasystole. Please review Lab Exercise 6, Activity 1. Comment: Nice work! Question 31 of 32 4.0/ 4.0 Points Briefly explain why wave summation and tetany would be deadly in cardiac muscle. Cardiac cells have longer AP's and twitches than any other muscle cells, so they don't show temporal summation making it impossible. Feedback: Learning Objective: Explain why the absence of wave summation and tetanus is important to cardiac muscle function. Please review Lab Exercise 6, Activity 1. Comment: Nice work! Part 7 of 7 - 0.0/ 5.0 Points Instructions: 1. Click on the Browse button to find the lab report on your computer. 2. Click on the Upload button to attach your lab report to the quiz. Question 32 of 32 0.0/ 5.0 Points Attach your completed Lab Exercise 6, Activity 2: Examining the Effect of Vagus Nerve Stimulation lab report (PEX-06-02_FirstnameLastname.pdf) as the answer to this question.