Exam (elaborations)
BIO 431- EXAM 4- BLOOD VESSELS & ANATOMY QUESTIONS WITH LATEST UPDATE
- Course
- Institution
BIO 431- EXAM 4- BLOOD VESSELS & ANATOMY QUESTIONS WITH LATEST UPDATE
[Show more]
Content preview
BIO 431- EXAM 4- BLOOD VESSELS &ANATOMY QUESTIONS WITH LATEST
UPDATE
Name the 3 tunics of the vessel wall - Answer-Tunica intima. Tunica media. Tunica
Externa.
In which "tunic" or tunics of the blood vessel would you find Internal elastic lamina -
Answer-Tunica intima.
In which "tunic" or tunics of the blood vessel would you find vascular smooth muscle
cells - Answer-Tunica media
In which "tunic" or tunics of the blood vessel would you find endothelial cells - Answer-
Tunica intima
In which "tunic" or tunics of the blood vessel would you find collagen fibers - Answer-
Tunica externa
In which "tunic" or tunics of the blood vessel would you find elastic fibers (elastin) -
Answer-tunica media
Compare/contrast arteries and veins in the terms of the following: which is a "blood
reservoir?" - Answer-veins
Compare/contrast arteries and veins in the terms of the following: which is a "pressure
reservoir?" - Answer-arteries.
Compare/contrast arteries and veins in the terms of the following: Presence or absence
of valves - Answer-Veins have venous valves. Arteries don't.
Compare/contrast arteries and veins in the terms of the following: What is meant by
"small capacitance" and "large capacitance"- how does this affect pressure? - Answer-
Arteries have a small capacitance and they have a high pressure. Veins have a large
capacitance and low pressure.
Compare/contrast arteries and veins in the terms of the following: Proportionally, which
have more smooth muscle cell (SMC) thickness, and tunica adventitia. - Answer-
Arteries
Which (arteries or veins) has: better elastic recoil - Answer-arteries
Which (arteries or veins) has: larger lumens - Answer-veins
, Which (arteries or veins) has: higher pressures - Answer-arteries
Which (arteries or veins) has: a fixed capacitance - Answer-arteries
Which (arteries or veins) has: more compliance - Answer-veins
Which have pre-capillary sphincters? - Answer-arterioles
How many layers (tunics) do large arteries and veins have? 1,2 or 3? - Answer-3
How many layers do arterioles have? - Answer-2
How many layers do capillaries have? - Answer-1
How many layers do veins have? - Answer-3
Which have the highest elastin levels for the pressure reservoir function? - Answer-
Elastic arteries
Why are arterioles called your "resistance vessels"? - Answer-An arteriole is a very
small branch of an artery that delivers blood to a capillary. Through vasoconstriction and
vasodilation arterioles play major roles in: regulating blood flow from arteries to
capillaries, regulating blood pressure. Arterioles are therefore known as resistance
vessels.
How does NO (nitric oxide) affect arteriolar resistance? - Answer-Nitric oxide is
produced in response to high blood flow or other signaling molecules, and promotes
systemic and localized vasodilation.
How are veins modified to help maintain venous return under low pressure? - Answer-
Large lumens, valves, skeletal muscle pump,respiratory pump.
Discuss venous valves - Answer-Veins have valves. Prevent backwards flow of blood
Discuss the skeletal muscle pump - Answer-The valves in conjunction with skeletal
muscle pump, help accomplish venous return.
Discuss the respiratory pump - Answer-Lies horizontal. Elimante hydrostatic pressure.
Inspiration increase thoracic volume, decrease pressure in chest veins. (pump)
Discuss the fact that veins have large lumens - Answer-Compared to arteries veins
have very large lumens. There are more layers with decreased R to blood flow.
Continous capillary - Answer-Most common and allow passage of fluids and small
solutes, least leaky, in skin and muscles.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller lectknancy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
48756 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 15 years now