PHYS 261 FINAL EXAM Questions And Answers | Latest Version 2026 | Graded A+

PHYS 261 FINAL EXAM Questions And Answers | Latest Version 2026 | Graded A+ Match each term with its definition. A. cardiac output (CO) B. heart rate (HR) C. end-diastolic volume (EDV) D. stroke volume (SV) E. end-systolic volume (ESV)the volume of blood pumped out of the heart from one ventricle during one contraction - answerD. stroke volume (SV) The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ion(s)? Ca2+ only K+ only Na+ only both Ca2+ and K+ both Na+ and K+ - answer-Na+ only Match each term with its definition. A. cardiac output (CO)B. heart rate (HR) C. end-diastolic volume (EDV) D. stroke volume (SV) E. end-systolic volume (ESV) the volume of blood in the ventricle available to be pumped out of the heart during one contraction - answer-c. end-diastolic volume (EDV) Match each term with its definition. A. cardiac output (CO) B. heart rate (HR) C. end-diastolic volume (EDV) D. stroke volume (SV) E. end-systolic volume (ESV) the volume of blood left in the ventricle after it contracts - answer-E. end-systolic volume (ESV) The volume of blood ejected from each ventricle during a contraction is called the end-diastolic volume. stroke volume. cardiac reserve. cardiac output. end-systolic volume. - answer-stroke volume. What happens when calcium binds troponin? Troponin binds to actin and causes sarcomere shortening.Troponin changes shape and covers the SR calcium channel, which is a form of negative feedback. Tropomyosin is pulled away from the myosin-binding site on actin. Troponin releases myosin and activates actin. - answer-Tropomyosin is pulled away from the myosinbinding site on actin. The driving force for blood flow is a(n) ________ gradient. gravity pressure osmotic volume - answer-pressure