Question

1. The brain needs a continuous supply of blood and oxygen.Why?
2.
What are sensory nerves?​

Answer 1

Explanation:

1. Because brain cells will die if the supply of blood which carries oxygen is stopped, the brain has top priority for the blood. Even if other organs need blood, the body attempts to supply the brain with a constant flow of blood.

2. A sensory nerve is really a collection of long dendrites carrying messages to the central nervous system from the periphery.

Hope it helps!!

Answer 2

Answer:

1. Having enough oxygen in the brain is crucial to brain function, and therefore, to the body as a whole. The brain requires a constant supply of both oxygen and glucose. Without enough oxygen or with low blood-oxygen levels, the brain has trouble signaling where to send blood to oxygen-hungry muscles and tissues.
2. The sensory function of the nervous system involves collecting information from sensory receptors that monitor the body's internal and external conditions. These signals are then passed on to the central nervous system (CNS) for further processing by afferent neurons (and nerves).