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Bios 255 Midterm/Finals Exam Questions and
Answers 100% Pass
Which of the typical blood vessels has a thin tunica tunica media dominated by collagen fibers? -
ANSWER ✔✔-veins
Capillaries surrounding the choroid plexus is of which type? - ANSWER ✔✔-Fenestrated capillaries
Blood flow through a capillary bed is passed by what structure? - ANSWER ✔✔-Atriovenous
Anastomosis
Blood flows toward the heart in the veins by? - ANSWER ✔✔--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
As the blood flows from venules toward the heart, what increases? - ANSWER ✔✔-Resistance
Blood volume is decreased by what two hormones? - ANSWER ✔✔-ANP & BNP
Which of the following is not a vasoconstrictor?
-Prostagladin
-Thromboxones
-Nitric Oxide - ANSWER ✔✔-Nitric Oxide
Vasodilation is achieved by adrenergic receptors. True or False - ANSWER ✔✔-False
Created by Grace Amelia © 2025, All Rights Reserved.
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Baroreceptors are found in what sinus? - ANSWER ✔✔-Carotid Sinuses
Which of the typical blood vessels has thick tunica media dominated by smooth muscle cells and elastic
fibers? - ANSWER ✔✔-Arteries
Femoral artery is a type of what artery? - ANSWER ✔✔-Muscular Artery
Capillaries that have a complete lining are called what? - ANSWER ✔✔-Continuous Capillaries
Blood flow through a capillary is regulated by what? - ANSWER ✔✔-Precapillary Sphincter
As the blood flows from the aorta towards the cappilaries what increases? - ANSWER ✔✔-Resistance
Pressure gradient of water causes osmosis. True or False - ANSWER ✔✔-False
Which of the following is NOT a vasodilator? - ANSWER ✔✔-Prostagladin
Venous reserve is used during extreme blood loss. True or False - ANSWER ✔✔-True
Chemoreceptors are found in what? - ANSWER ✔✔-Aortic Bodies
Venous valves allow blood to flow in BOTH directs. True or False. - ANSWER ✔✔-False
The normal heart sounds are caused by what? - ANSWER ✔✔-The closure of the heart valves
The left ventricular wall of the heart is much thicker than the right wall in order to do what? - ANSWER
✔✔-Pump blood against a greater pressure
Ventricular depolarization corresponds to what complex? - ANSWER ✔✔-QRS Complex
Blood within the pulmonary veins returns to the heart in what location? - ANSWER ✔✔-Left Atrium
When the heart rate is at 75, the duration of one cardiac cycle is how long? - ANSWER ✔✔-0.8 seconds
Cardiac muscle cells are like skeletal muscle cells in that they all have what? - ANSWER ✔✔-Striation
Created by Grace Amelia © 2025, All Rights Reserved.
Bios 255 Midterm/Finals Exam Questions and
Answers 100% Pass
Which of the typical blood vessels has a thin tunica tunica media dominated by collagen fibers? -
ANSWER ✔✔-veins
Capillaries surrounding the choroid plexus is of which type? - ANSWER ✔✔-Fenestrated capillaries
Blood flow through a capillary bed is passed by what structure? - ANSWER ✔✔-Atriovenous
Anastomosis
Blood flows toward the heart in the veins by? - ANSWER ✔✔--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
As the blood flows from venules toward the heart, what increases? - ANSWER ✔✔-Resistance
Blood volume is decreased by what two hormones? - ANSWER ✔✔-ANP & BNP
Which of the following is not a vasoconstrictor?
-Prostagladin
-Thromboxones
-Nitric Oxide - ANSWER ✔✔-Nitric Oxide
Vasodilation is achieved by adrenergic receptors. True or False - ANSWER ✔✔-False
Created by Grace Amelia © 2025, All Rights Reserved.
, 2|Page
Baroreceptors are found in what sinus? - ANSWER ✔✔-Carotid Sinuses
Which of the typical blood vessels has thick tunica media dominated by smooth muscle cells and elastic
fibers? - ANSWER ✔✔-Arteries
Femoral artery is a type of what artery? - ANSWER ✔✔-Muscular Artery
Capillaries that have a complete lining are called what? - ANSWER ✔✔-Continuous Capillaries
Blood flow through a capillary is regulated by what? - ANSWER ✔✔-Precapillary Sphincter
As the blood flows from the aorta towards the cappilaries what increases? - ANSWER ✔✔-Resistance
Pressure gradient of water causes osmosis. True or False - ANSWER ✔✔-False
Which of the following is NOT a vasodilator? - ANSWER ✔✔-Prostagladin
Venous reserve is used during extreme blood loss. True or False - ANSWER ✔✔-True
Chemoreceptors are found in what? - ANSWER ✔✔-Aortic Bodies
Venous valves allow blood to flow in BOTH directs. True or False. - ANSWER ✔✔-False
The normal heart sounds are caused by what? - ANSWER ✔✔-The closure of the heart valves
The left ventricular wall of the heart is much thicker than the right wall in order to do what? - ANSWER
✔✔-Pump blood against a greater pressure
Ventricular depolarization corresponds to what complex? - ANSWER ✔✔-QRS Complex
Blood within the pulmonary veins returns to the heart in what location? - ANSWER ✔✔-Left Atrium
When the heart rate is at 75, the duration of one cardiac cycle is how long? - ANSWER ✔✔-0.8 seconds
Cardiac muscle cells are like skeletal muscle cells in that they all have what? - ANSWER ✔✔-Striation
Created by Grace Amelia © 2025, All Rights Reserved.
