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Bios 255 midterm Exam Questions and Answers
100% Pass
types of capillaries - ANSWER ✔✔-continuous, fenestrated, sinusoid
3 blood vessel layers - ANSWER ✔✔-tunica intima, tunica media, tunica externa
Arteries Carrie blood - ANSWER ✔✔-Away from the heart
anastomosis - ANSWER ✔✔-Provide an alternate route for blood flow
Venous return assisted by 3 things - ANSWER ✔✔-valves, respiratory pump, skeletal muscle pump
Vascular resistance depends on . 3 things - ANSWER ✔✔-size of lumen, blood viscosity, total blood
vessel length
Cardiac output equation - ANSWER ✔✔-heart rate x stroke volume
Pulse pressure equation - ANSWER ✔✔-systolic - diastolic pressure
Mean Arterial Pressure (MAP) - ANSWER ✔✔-Diastolic pressure + pulse pressure / 3
the largest portion of blood is in ? - ANSWER ✔✔-Systemic veins
Substances cross capillary walls by: - ANSWER ✔✔-diffusion, transcytosis, bulk flow
Starling's Law of the Capillaries - ANSWER ✔✔-Filtration (blood capillaries to interstitial fluid)
Reabsorption ( interstitial fluid to blood capillaries)
Factors that affect blood flow (5) - ANSWER ✔✔-1.Increased blood volume
2. Skeletal muscle pump
Created by Grace Amelia © 2025, All Rights Reserved.
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3. Respiratory pump
4. Venoconstriction
5.increased venous return
Baroreceptors - ANSWER ✔✔-important pressure-sensitive sensory neurons that monitor stretching of
the walls of blood vessels and the atria
Autoregulation - ANSWER ✔✔-the ability of tissues to regulate their own blood supply
cerebral arterial circle (circle of willis) - ANSWER ✔✔-an anastomosis surrounding the pituitary glad
common hepatic - ANSWER ✔✔-Supplies the liver
Types of shock (4) - ANSWER ✔✔-•Hypovolemic
•Distributive
•Cardiogenic
•Obstructive
Functions of blood (3) - ANSWER ✔✔-transport, regulation, protection
Blood composition - ANSWER ✔✔-55% plasma, 45% formed elements
buffy coat contains - ANSWER ✔✔-WBCs and platelet
Hemopoiesis - ANSWER ✔✔-blood cell formation
lymphocytes life span - ANSWER ✔✔-weeks to years
myeloid stem cells - ANSWER ✔✔-give rise to red blood cells, monocytes, neutrophils, eosinophils,
basophils, and platelets
lymphoid cells (lymphocytes) - ANSWER ✔✔-T cells and B cells, NK cells
Created by Grace Amelia © 2025, All Rights Reserved.
Bios 255 midterm Exam Questions and Answers
100% Pass
types of capillaries - ANSWER ✔✔-continuous, fenestrated, sinusoid
3 blood vessel layers - ANSWER ✔✔-tunica intima, tunica media, tunica externa
Arteries Carrie blood - ANSWER ✔✔-Away from the heart
anastomosis - ANSWER ✔✔-Provide an alternate route for blood flow
Venous return assisted by 3 things - ANSWER ✔✔-valves, respiratory pump, skeletal muscle pump
Vascular resistance depends on . 3 things - ANSWER ✔✔-size of lumen, blood viscosity, total blood
vessel length
Cardiac output equation - ANSWER ✔✔-heart rate x stroke volume
Pulse pressure equation - ANSWER ✔✔-systolic - diastolic pressure
Mean Arterial Pressure (MAP) - ANSWER ✔✔-Diastolic pressure + pulse pressure / 3
the largest portion of blood is in ? - ANSWER ✔✔-Systemic veins
Substances cross capillary walls by: - ANSWER ✔✔-diffusion, transcytosis, bulk flow
Starling's Law of the Capillaries - ANSWER ✔✔-Filtration (blood capillaries to interstitial fluid)
Reabsorption ( interstitial fluid to blood capillaries)
Factors that affect blood flow (5) - ANSWER ✔✔-1.Increased blood volume
2. Skeletal muscle pump
Created by Grace Amelia © 2025, All Rights Reserved.
, 2|Page
3. Respiratory pump
4. Venoconstriction
5.increased venous return
Baroreceptors - ANSWER ✔✔-important pressure-sensitive sensory neurons that monitor stretching of
the walls of blood vessels and the atria
Autoregulation - ANSWER ✔✔-the ability of tissues to regulate their own blood supply
cerebral arterial circle (circle of willis) - ANSWER ✔✔-an anastomosis surrounding the pituitary glad
common hepatic - ANSWER ✔✔-Supplies the liver
Types of shock (4) - ANSWER ✔✔-•Hypovolemic
•Distributive
•Cardiogenic
•Obstructive
Functions of blood (3) - ANSWER ✔✔-transport, regulation, protection
Blood composition - ANSWER ✔✔-55% plasma, 45% formed elements
buffy coat contains - ANSWER ✔✔-WBCs and platelet
Hemopoiesis - ANSWER ✔✔-blood cell formation
lymphocytes life span - ANSWER ✔✔-weeks to years
myeloid stem cells - ANSWER ✔✔-give rise to red blood cells, monocytes, neutrophils, eosinophils,
basophils, and platelets
lymphoid cells (lymphocytes) - ANSWER ✔✔-T cells and B cells, NK cells
Created by Grace Amelia © 2025, All Rights Reserved.
