Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
New Topic  
lei.frank lei.frank
wrote...
Go to Answer
Posts: 18
Rep: 0 0
11 years ago
I have that vasoconstriction increases blood pressure, but why is it that in blood capillaries, the blood pressure drops.
It seems like a contradiction, so can you clarify this?

Thanks
Read 448 times
2 Replies
Replies
Answer accepted by topic starter
datguydatguy
wrote...
#1
Posts: 19
Rep: 0 0
11 years ago
Sign in or Sign up in seconds to unlock everything for free
This verified answer contains over 160 words.
1

Related Topics

wrote...
#2
11 years ago
1. "Blood pressure" means "blood pressure in arteries" unless explicitly stated as the pressure in a particular vessel or set of vessels e.g. jugular venous pressure, central venous pressure, etc.

2. The "resistance vessels" in the circulation (the ones that have the most resistance and biggest effect on blood pressure) are the very small arteries (the arterioles). These are downstream of the arteries (where "blood pressure" is measured) and upstream of capillaries.

3. Vasoconstriction (of the resistance vessels) - arterial pressure goes up, capillary pressure goes down.

So no contradiction, just have to be aware that unspecified blood pressure = arterial blood pressure.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1451 People Browsing
 128 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 248
  
 320
  
 276
Your Opinion
Who will win the 2024 president election?
Votes: 3
Closes: November 4
Previous poll results: Which is the best fuel for late night cramming?