Anatomy II: Blood Vessels

Question 1

What is the role of blood vessels?

Answer 1

Transport blood to tissues (where gases & nutrients are exchanged) and then transport the blood back to the heart.
- also controls BP
- Secretes chemicals

Question 2

What are chemoreceptors?

Answer 2

They detect blood oxygen, carbon dioxide, and hydrogen ion concentration; In aorta and common carotid artery in the neck.

Question 2

What are baroreceptors and where are they located?

Answer 2

Pressure receptors; In aorta and common carotid artery in the neck.

Question 3

What is Athereosclerosis?

Answer 3

Leading cause of death - caused by atherosclerotic plaque (lipid, cholesterol, calcium salts, and cellular debris)

Question 4

Define: Blood Pressure (mm Hg)

Answer 4

Outward pressure that blood exerts on walls of blood vessels.

Question 5

Where is blood pressure highest and lowest in?

Answer 5

Highest in large systemic arteries and lowest in large systemic veins.

Question 6

Velocity ____ as cross-sectional area ______.

Answer 6

DECREASES; INCREASES

Question 7

What is a respiratory pump?

Answer 7

Helps propel blood through thoracic and abdominal cavity veins.

Question 8

What is inspiration vs expiration in Blood vessels?

Answer 8

Inspiration: Increases venous return to the heart due to negative thoracic pressure.
Expiration: Decreases venous return as thoracic pressure rises, compressing veins.