Homework Answers
Option 1 is false, since by definition, fibrillations are rapid, erratic and unsynchronized contractions of muscle fibers.
Option 2 is true, since fibrillations can occur in ventricles. This is called ventricular fibrillation and is caused due to disordered electrical activity in the ventricles, causing them to contract irregularly and rapidly.
Option 3 is true. Certain injuries in the Achilles tendon, such as Achilles tendinosis, are associated with fibrillation of the Achilles tendon.
So, only two of the above are true regarding fibrillations. Therefore, option 4 is the correct answer.
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Which of the following is true about fibrillations? o they are slow, regular, but unsynchronized contractions...
all 3? Which statement about muscle contractions is false? O An action potential in the muscle...
all 3?
Which statement about muscle contractions is false? O An action potential in the muscle cell activates contraction by releasing Car within the muscle. O A single action potential at the neuromuscular junction is sufficient to cause a muscle to twitch. O Summation of twitches leads to a graded increase in the tension that can be generated by a single muscle fiber. The tension generated by a muscle can be varied by controlling how many of its motor units...
Which of the following is FALSE about Slow Twitch Fibers (Slow fibers, slow oxidative fibers) compared...
Which of the following is FALSE about Slow Twitch Fibers (Slow fibers, slow oxidative fibers) compared with fast twitch: A.contain more myofibrils B.contain more myoglobin C.contain more mitochondria D.surrounded by more capillaries E.better for endurance activities
Which of the following statements is true? All of these Phasic contractions maintain the prolonged contractions...
Which of the following statements is true? All of these Phasic contractions maintain the prolonged contractions of sphincters Pacemaker cells provide short reflex control of gastrointestinal tract motility The sympathetic system stimulates contraction in the gastrointestinal tract
Which of the following is true about most human hearts? O a one-way valve moves blood...
Which of the following is true about most human hearts? O a one-way valve moves blood directly from the right atrium to the right ventricle two-way valves move blood between the left and right atria O one-way valves move blood directly from atria to major arteries and veins O a one-way valve moves blood between the left and right ventricles O none of the above are true about most human hearts
dont need explanation just want to compare my answers. 47. Concentric contractions occur when (A) the...
dont need explanation just want to compare my answers.
47. Concentric contractions occur when (A) the muscle produces a constant tension as it shortens; (D) tension and length of the muscle remain constant during a contraction: (C) tension in a muscio 15 man constant while the muscle increases in length; (D) the tension and the length of the muscle increuse s contraction; (E) the tension and the length of the muscle decrease during contraction. 48. Which of the following would...
QUESTION 2 Which of the following are true about vaccines. O A. A treatment for diseases...
QUESTION 2 Which of the following are true about vaccines. O A. A treatment for diseases once symptoms have show B. Can only be produced against viruses C. Should be able to prevent acquiring a disease witho D. Vaccines need to be boosted every couple of years to O E. All of the above are true.
Please answer all parts. Thanks in advance 19) Which statement(s) is(are) NOT true regarding cardiac muscle?...
Please answer all parts. Thanks in advance
19) Which statement(s) is(are) NOT true regarding cardiac muscle? Choose ALL that apply. (2.5 pts) a) Autorhythmic cells do not contribute significantly to the force of heart contraction because they do not contain many myofibrils. b) Cardiac muscle consists of autorhythmic fibers and contractile fibers. c) Cardiac muscle is similar to skeletal muscle since t contains thick and thin filaments, d) Cardiac muscle is similar to skeletal muscle in that the muscle fibers...
Which of the following statements are true about an annuity? (select all that apply- i.e. just...
Which of the following statements are true about an annuity? (select all that apply- i.e. just one or as many as all of them) It is a series of equal payments made at regular intervals The present value can be calculated without using a time-value table, simply by adding up all the payments The payment amount can increase over time O Payments must occur on an annual basis
Which of the following are true regarding the heart? Mark (A) for Correct or (B) Incorrect....
Which of the following are true regarding the heart? Mark (A) for Correct or (B) Incorrect. If incorrect please indicate why! ____ The pulmonic valve opens during systole. ____ The tricuspid valve is a semi-lunar valve anchored to the heart by the myocardium. ____ The aortic valve is open throughout all of ventricular systole Atrial pressure increases during ventricular systole. ____ Ventricular pressure increases during both atrial and ventricular contractions. ____ P waves are associated with preloading the ventricles.
FLUID o True False 1 pts Question 3 Which of the following statements about MEIOSIS are...
FLUID o True False 1 pts Question 3 Which of the following statements about MEIOSIS are CORRECT? Only haploid cells are produced Sister chromatids are separated during anaphase I and homologous chromosomes are separated during anaphase II After crossing over (recombination) the sister chromatids are still identical There are two rounds of cell division following only one round of DNA synthesis non-disjunction can occur during either anaphase I or Il 1 pts Question 4
all 3?
Which statement about muscle contractions is false? O An action potential in the muscle cell activates contraction by releasing Car within the muscle. O A single action potential at the neuromuscular junction is sufficient to cause a muscle to twitch. O Summation of twitches leads to a graded increase in the tension that can be generated by a single muscle fiber. The tension generated by a muscle can be varied by controlling how many of its motor units...
Which of the following statements is true? All of these Phasic contractions maintain the prolonged contractions of sphincters Pacemaker cells provide short reflex control of gastrointestinal tract motility The sympathetic system stimulates contraction in the gastrointestinal tract
Which of the following is true about most human hearts? O a one-way valve moves blood directly from the right atrium to the right ventricle two-way valves move blood between the left and right atria O one-way valves move blood directly from atria to major arteries and veins O a one-way valve moves blood between the left and right ventricles O none of the above are true about most human hearts
dont need explanation just want to compare my answers.
47. Concentric contractions occur when (A) the muscle produces a constant tension as it shortens; (D) tension and length of the muscle remain constant during a contraction: (C) tension in a muscio 15 man constant while the muscle increases in length; (D) the tension and the length of the muscle increuse s contraction; (E) the tension and the length of the muscle decrease during contraction. 48. Which of the following would...
QUESTION 2 Which of the following are true about vaccines. O A. A treatment for diseases once symptoms have show B. Can only be produced against viruses C. Should be able to prevent acquiring a disease witho D. Vaccines need to be boosted every couple of years to O E. All of the above are true.
Please answer all parts. Thanks in advance
19) Which statement(s) is(are) NOT true regarding cardiac muscle? Choose ALL that apply. (2.5 pts) a) Autorhythmic cells do not contribute significantly to the force of heart contraction because they do not contain many myofibrils. b) Cardiac muscle consists of autorhythmic fibers and contractile fibers. c) Cardiac muscle is similar to skeletal muscle since t contains thick and thin filaments, d) Cardiac muscle is similar to skeletal muscle in that the muscle fibers...
Which of the following statements are true about an annuity? (select all that apply- i.e. just one or as many as all of them) It is a series of equal payments made at regular intervals The present value can be calculated without using a time-value table, simply by adding up all the payments The payment amount can increase over time O Payments must occur on an annual basis
FLUID o True False 1 pts Question 3 Which of the following statements about MEIOSIS are CORRECT? Only haploid cells are produced Sister chromatids are separated during anaphase I and homologous chromosomes are separated during anaphase II After crossing over (recombination) the sister chromatids are still identical There are two rounds of cell division following only one round of DNA synthesis non-disjunction can occur during either anaphase I or Il 1 pts Question 4
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