Blood pressure

Question 1

The blood pressure

Answer 1

pressure which the blood exerts on the
walls of the blood vessels.

Question 2

Systolic blood pressure

Answer 2

the pressure produced within
the arterial system due to left ventricle contraction pushing blood into the aorta.

In an adult, the systolic pressure is about 120 mmHg

Question 3

Diastolic blood pressure

Answer 3

the pressure within the arteries when the heart is resting following the ejection of blood.

in an adult is 80mmHg

Question 4

Sphygmomanometer

Answer 4

Is an instrument used to measure
arterial blood pressure.

Question 5

The arteries of the brain

Answer 5

• The right and left carotid arteries
• The right and left vertebral arteries

Question 6

The internal carotid artery

Answer 6

• supply a large part of the cerebral hemispheres, the eye and its associated
  structures.
• Divides to anterior and middle cerebral arteries and anterior communicating artery

Question 7

The external carotid artery

Answer 7

• The external carotid artery is a major artery that supplies blood to the face, neck, and scalp.
• It branches off from the common carotid artery, which runs along the side of the neck.

Question 8

The vertebral arteries

Answer 8

• It enters the skull through the foramen magnum.
• Inside the skull, the two vertebral arteries join to form the basilar artery
• It arises from the subclavian artery, which is a large artery that supplies blood to the arms.

Question 9

Circle of willis

Answer 9

formed by the;
* two internal carotid arteries,
* the basilar artery and the anterior
* posterior communicating arteries at the base of the brain.

Question 10

Importance of the circle of willis

Answer 10

• Ensures a continuous blood supply to the brain, even if one of the arteries becomes blocked.

Question 11

Arteries that branch from the circle of willis from each side.

Answer 11

• The anterior cerebral artery which passes upwards and backwards in the midline over the corpus callosum.
• The middle cerebral artery which is the other terminal branch of the internal carotid. Supplies a large part of the
  lateral surface of the cerebral hemisphere.
• The posterior cerebral artery is one of the terminal branches of the vertebral artery.