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Biol 320 Exam 2 Newest 2025 Actual Exam Complete Questions And Correct Answers(Verified Answers) |Already Graded A+
By how many weeks is the heart fully formed during pregnancy?
- ANSWER-5 weeks (35 days)
What is the purpose of the foramen oval in fetus hearts? - ANSWER-bypass pulmonary circuit
What is the purpose of the ductus arteriosus in fetus hearts? - ANSWER-backup pulmonary circuit
What is a ventricular septal defect? - ANSWER-more blood is shunted from left to right because of lack of interventricular septum
What is a coarctation of the aorta? - ANSWER-part of aorta is narrowed, increasing workload of left ventricle
What is the tetralogy of Fallot? - ANSWER-pulmonary trunk too narrow and pulmonary valve stenosed, hypertrophied right 1 / 3
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ventricle, ventricular septal defect, aorta opens from both ventricles
What does it mean that all cardiac cells are amitotic? - ANSWER-dead cells are replaced with scar tissue
What is the result of sclerosis and thickening of valve flaps? - ANSWER-heart murmur
What is the result of cardiac reserve decline? - ANSWER-heart less able to respond to sudden and prolonged stresses that increase CO2
What is fibrosis of cardiac muscle? - ANSWER-cardiac cells die, stroke volume is reduced
What is atherosclerosis? - ANSWER-hardening of the arteries
What can cause atherosclerosis? - ANSWER-inactivity, smoking, stress, high cholesterol diet
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What are the risks of atherosclerosis? - ANSWER-heart attack, stroke
What is the purpose of elastic arteries? - ANSWER-allows large pulse, smooth flow
What is the purpose of muscular arteries? - ANSWER- vasoconstriction/dilate to control where blood goes
How is pressure related between tissues and lymphatic vessels? - ANSWER-pressure in tissues higher so fluid goes into lymphatic vessels
What are the types of arteries and veins, from aorta to vena cava? - ANSWER-elastic arteries, muscular arteries, arterioles, capillaries, venues, small veins, large veins
Which layer of blood vessels contain muscle? - ANSWER- tunica media
What system controls the tunica media? - ANSWER- sympathetic nervous system
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