Answered: Which of the following intrinsic…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Please help in answering this question - more than one answer may be correct:

Which of the following intrinsic factors would cause vasodilation of arterioles?

A) vasodilagen

B) decreased pH

C) increased CO2

D) decreased K+

E) increased O2

Expert Solution

Introduction

Arteries carry oxygenated blood from heart to all other tissues and organs. Arterioles are small branches from arteries that carry the oxygenated blood to the capillary bed which is a place in capillaries where the exchange occurs.
Arterioles are made of three layers namely intima, media and adventitia. Smooth muscles made up the media layer.
The smooth muscle has neurons through which it receives neuro signal to contract or expand the arteriole size. This helps in maintaining blood pressure.
Vasodilation means increasing in the diameter (widening) of arteriole which is due to the relaxation of smooth muscle cells. This increases the blood flow and decreases blood pressure. The factors responsible for it may be intrinsic (endogenous) or extrinsic (exogenous).

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