Unit 1 Brain/CCA

The brain is _____ of body weight

2%

The brain receives _____ of cardiac output

15%

The brain has ______ _______ because of high metabolic rate

little reserve

The brain consumes ____ of body’s oxygen supply in a _______ ______, can’t store oxygen

20%; basal state

True or False:

The sympathetic nervous system (fight or flight) response is small

True

True or False:

The brain is greatly affected by chemical changes in the blood.

True

The brain develops symptoms with stenosis even if they are…..

short

How many minutes can cell death occur

3-8 minutes

Cerebral flow relies on what kind of pressure?

perfusion pressure

The aorta arises from the…….

left ventricle

What is the brachiocephalic artery also known as?

the innominate artery

When is the aorta considered the descending aorta

Once the aorta passes the subclavian artery

What are the 3 segments of the Aorta?

1. ascending aorta

2. aortic arch

3. descending aorta

Where is the ascending aorta located?

at the base of the aortic semilunar valve

The ascending aorta travels superiorly….

4-5cm

Where are the 2 coronary arteries located?

at the aortic sinus

The aortic arch gives rise to _____ major arteries

3

What are the 3 major arteries that come off the aortic arch?

-innominate artery

-left common carotid artery

-left subclavian artery

The descending aorta begins right after the?

left subclavian artery takeoff

The descending aorta divides into 2 segments, what are they?

-thoracic aorta

-abdominal aorta

What is the first major branch of the aortic arch?

the innominate artery

What is the length of the innominate artery?

2 inches

Where does the innominate artery travel?

travels cephalad slightly posteriorly to the right for 4-5cm

Where is the innominate artery located?

upward through the mediastinum, near junction of sternum and right clavicle

What does the innominate artery branch into?

-right subclavian artery

-right common carotid artery

Where does the right subclavian artery originate from?

off the innominate artery

Where does the right subclavian artery course?

upward and outward from the sternoclavicular articulation

The RSA primarily perfuses the

upper extremity

How many parts does the RSA divide into?

3 parts

Where is the origin of the first part of the subclavian artery?

to inner margin of scalenus anticus muscle

The 1st major branch (superiorly) is the

vertebral artery

Subclavian artery 2nd part:

-relatively short

-lies behind scalenus anticus muscle

The second part of the subclavian artery branches

4th major branch (superiorly) - costocervical trunk

Subclavian Artery Third Part:

-passes downward and outward from outer margin of scalenus anticus muscle

-under the clavicle

-to outer border of the first rib

The 3rd part of the subclavian artery creates an area known as the?

thoracic outlet