Chapter 33, Problem 2STP

Summary Introduction

Introduction:

Neurons or the nerve cells are involved in the sending and receiving of signals from the brain. In the structure of the neuron, the axon is found that allows the transmission of a chemical and electric signal to the cell. The transmission of the signal may also carry out with help of dendrites. The cell body is also termed as soma that carries the genetic materials and is involved in the maintenance of the structure of a neuron and provides energy for the activity. The cell body consists of a nucleus and specialized organelles. The axon is organelles that have a tail-like structure that connects the cell body to the specialized junction termed as axon hillock. Myelin helps the axon to transmit the signal. Dendrites are a fibrous root-like form that branches from the cell body. This organelle involves the receiving and processing of the signal and is termed as dendritic trees.

Answer to Problem 2STP

Correct answer:

The correct answer is option (B) 2.

Explanation of Solution

Explanation/justification for the correct answer:

Option (B) The label 2 represents the axon. The axon is organelles that have a tail-like structure that connects the cell body to the specialized junction termed as axon hillock. Myelin helps the axon to transmit the signal. So, the correct answer is option (B).

Explanation for incorrect answer:

Option (A). The label 1 represents the axon ends. This connects one neuron to the other and the transmission continues. So, this is an incorrect option.

Option (C). The label 3 represents dendrites. Dendrites are fibrous root-like form that branches from the cell body, this organelle involves the receiving and processing of the signal and is termed as dendritic trees. So, this is an incorrect answer.

Option (D). The label 4 represents the cell body. The cell body consists of a nucleus and specialized organelles. So, this is an incorrect answer.