Chapter 33, Problem 12A

Summary Introduction

Introduction:

Neurons are specialized cells that help to collect external information, analyze the information, and respond to it. Neurons make up a large signaling network, called the nervous system, in the body. A neuron mainly consists of three regions: an axon, the dendrites and a cell body. There are three groups of neurons: sensory neurons, motor neurons, and interneurons.

Answer to Problem 12A

Correct answer :

The correct answer is option (C) slows the heart rate.

Explanation of Solution

Explanation/justification for the correct answer :

Option (C) slows the heart rate. The sympathetic nervous system is the most effective in times of emergency or stress when heart rate and respiratory rate increase. So, the correct answer is option (C).

Explanation for incorrect answer :

Option (A) stimulates digestion. The digestion rate occurs in the parasympathetic nervous system. So, this is an incorrect answer.

Option (B) dilates the bronchi. The bronchial muscle relaxed in sympathetic stimulation. So, this is an incorrect answer.

Option (D) converts glucose to glycogen. In sympathetic stimulation, the conversion of glucose to glycogen does not take place. So, this is an incorrect answer.