Blood Vessels-Arterioles Flashcards
1
Q
What are arterioles?
A
Smaller branch from artery
2
Q
What are arterioles controlled by?
A
The nervous system
3
Q
What does the nervous system control with regards to arterioles?
A
Regulate diameter and control blood flow
4
Q
What does being red or flushed mean with regards to arterioles? What type of feature is this and what does it do to blood flow?
A
- Red or flushed are arterioles relaxing or vasodilation occurring (diameter increases).
- Cooling feature that increases blood flow.
5
Q
What do nerve impulses cause with regards to arterioles? What type of feature is this and what does this feature do to blood flow?
A
-Causes a contraction or vasoconstriction (diameter decreases).
-Heating feature that decreases blood flow.
6
Q
Why is vasoconstriction important?
A
To ensure blood goes where is needed (5 L instead of 200 L).
