Chapter 14, Problem 3SQ

a.

Summary Introduction

To explain: The reason for which the circle of Willis is important in the cerebral circulation.

Concept introduction: The control and communication center of human body are termed as the brain. The brain receives, evaluates and processes several inputs and manages the action and initiates the response. There are various voluntary and in voluntary activities that occur in the body to maintain the homeostasis.

b.

Summary Introduction

To predict: The effects of obstruction of the left middle cerebral artery.

Concept introduction: The supply of blood to the brain occurs by the vertebral artery and the internal carotid arteries. Every internal carotid artery is the branch of the right and left carotid artery. At brainstem, every internal carotid artery divides into an anterior and middle cerebral artery.

c.

Summary Introduction

To explain: The reason for which a constant supply of oxygen and glucose to the brain is necessary.

Concept introduction: The control and communication center of a human body are termed as the brain. The brain receives, evaluates and processes several inputs, manages the action, and initiates the response. For oxidation mechanism and function, the brain mainly depends upon glucose and oxygen for functioning.