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Author Question: Local myogenic regulation of blood vessel diameter and thus blood flow through a vessel is an ... (Read 167 times)

ENagel

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on: Jun 25, 2018
Local myogenic regulation of blood vessel diameter and thus blood flow through a vessel is an example of:
 
  a. autonomic regulation.
  b. somatic regulation.
  c. autoregulation.
  d. metabolic regulation.

Question 2

Blood flow is affected by: (select all that apply)
 
  a. blood viscosity.
  b. blood vessel diameter.
  c. blood pressure.
  d. blood vessel length.
  e. blood composition.


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kaillie

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: C
The myogenic hypothesis proposes that autoregulation originates in vascular smooth muscle, pre-sumably of the arterioles, as a response to changes in arterial perfusion pressure. It is not a part of autonomic, somatic, or metabolic regulation.

Answer to Question 2

ANS: A, B, C, D
Resistance to flow is generally greater in longer tubes because resistance increases with length but decreases with a wider diameter. Blood flow varies inversely with the viscosity of the fluid. Thick fluids move more slowly and experience greater resistance to flow than thin fluids. In-creased blood pressure decreases blood flow because resistance is increased. Blood volume, not composition, plays a role in blood flow.


ENagel

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Reply 2 on: Jun 25, 2018
Gracias!

blakcmamba

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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