Exam (elaborations)
Bios 255 Midterm Finals 2025
- Course
- BIOS 255
- Institution
- Chamberlain College Of Nursing
Bios 255 Midterm Finals 2025
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Bios 255 Midterm/Finals1. Which of the typical blood vessels has a thin tunica tunica media
dominated by collagen fibers?: veins
2. Capillaries surrounding the choroid plexus is of which type?: Fenestrated
capillaries
3. Blood flow through a capillary bed is passed by what structure?:
Atriovenous Anastomosis
4. Blood flows toward the heart in the veins by?:
-With the aid of contractions of the adjacent skeletal muscles.
-Valves in the veins prevent the backflow of the blood
-Pressure at the venules is higher than the pressure at the venae cava
5. As the blood flows from venules toward the heart, what increases?:
Resistance
6. Blood volume is decreased by what two hormones?: ANP & BNP 7. Which
of the following is not a vasoconstrictor?
-Prostagladin
-Thromboxones
-Nitric Oxide: Nitric Oxide
8. Vasodilation is achieved by adrenergic receptors. True or False: False
9. Baroreceptors are found in what sinus?: Carotid Sinuses
10. Which of the typical blood vessels has thick tunica media dominated by
smooth muscle cells and elastic fibers?: Arteries
11. Femoral artery is a type of what artery?: Muscular Artery
12. Capillaries that have a complete lining are called what?: Continuous
Capillaries
13. Blood flow through a capillary is regulated by what?: Precapillary
Sphincter
14. As the blood flows from the aorta towards the cappilaries what
increases?: Resistance
15. Pressure gradient of water causes osmosis. True or False: False
16. Which of the following is NOT a vasodilator?: Prostagladin
17. Venous reserve is used during extreme blood loss. True or False: True
18. Chemoreceptors are found in what?: Aortic Bodies
19. Venous valves allow blood to flow in BOTH directs. True or False.: False
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, Bios 255 Midterm/Finals
20. The normal heart sounds are caused by what?: The closure of the heart
valves
21. The left ventricular wall of the heart is much thicker than the right wall in
order to do what?: Pump blood against a greater pressure
22. Ventricular depolarization corresponds to what complex?: QRS Complex
23. Blood within the pulmonary veins returns to the heart in what location?:
Left Atrium
24. When the heart rate is at 75, the duration of one cardiac cycle is how
long?: 0.8 seconds
25. Cardiac muscle cells are like skeletal muscle cells in that they all have
what?: Striation
26. The ascending aorta is connected to the: Left Ventricle
27. If the vagus nerve is severed, the result would be that: The heart rate will
increase
28. The mitral valve is closed during what?: During ventricular diastole
29. What will increase the contractility of the heart muscle?: Thyroxin,
Epinephrine, & Sympathetic Stimuli
30. An abnormally fast heart rate is called: Tachycardia
31. The specialized tissue in the heart muscle that conducts the ventricular
depolarization are the: Purkinje fibers
32. The circulatory needs of the heart muscle is provided by: the coronary
arteries
33. Blood within the vena cava returns to the heart at the: Right atrium
34. Cardiac muscle cells are unlike skeletal muscle cells in that they do not
have: Tetanic Contractions
35. The pulmonary trunk is connected to the: Right Ventricle
36. The tricuspid valve is closed during: ventricular systole
37. Heart murmurs are: abnormal heart sounds
38. What is the relationship between cardiac output, heart rate and stroke
volume?: CO= HR x SV
39. Which of the following will increase the preload ability of the heart
muscle? -Thryoxin
-Epinephrine
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