Why do you pass out if you lock your knees?

1 answer:

8 0

It's caused by blood pooling in the legs, so there's insufficient return to the heart and brain. Normally, moving one's legs helps to pump blood back to the heart through muscle contraction. Locking the knees makes standing still easier, but reduces use of the leg muscles. In some people, this pooling may lead to hypoperfusion of the brain and fainting, which is essentially the body's way of putting the brain and the legs and the heart at the same level.

You might be interested in

Which statement describes an innate behavioral adaptation of an animal?

shutvik [7]

Answer:

a pet parrot talking

Explanation:

dogs responding to "roll over"

6 0

3 years ago

Diffusion occurs because

Leokris [45]

I believe the correct answer should be A! c:

7 0

3 years ago

How does wet and dry barometer work?? Thnx

tatiyna

Wet barometer - The tool works by measuring atmospheric pressure to predict incoming weather. Since the glass is only filled halfway with water, the other half is exposed to the atmosphere. When the outdoor atmospheric pressure rises, the pressure in the glass decreases, and causes the water to move down the spout.

Dry barometer - A Torricellian barometer (sometimes called a mercury barometer) is an inverted (upside-down) glass tube standing in a bath of mercury. Air pressure pushes down on the surface of the mercury, making some rise up the tube. The greater the air pressure, the higher the mercury rises.

I hope this helps!

6 0

3 years ago

In dna replication which strand grows continuosly toward the

Kay [80]

Replication Fork! Is the answer! Hope this helps!

4 0

3 years ago

List 5 types of evidence used by scientists to support evolution.

Nata [24]

Answer:

Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.

Explanation:

hope it helps!

8 0

2 years ago