Washington Esthetician State Board Practice Exam

What type of tissue primarily makes up the brain?

1. Connective tissue

2. Epithelial tissue

3. Nerve tissue

4. Muscle tissue

The correct answer is: Nerve tissue

The brain is primarily composed of nerve tissue, which includes neurons and glial cells. Neurons are the specialized cells responsible for transmitting and processing information through electrical and chemical signals. Glial cells provide support, protection, and nourishment to neurons, playing a critical role in maintaining the overall environment of the nervous system. Nerve tissue is essential for the brain’s functions, which include processing sensory information, coordinating motor functions, and facilitating cognitive processes such as thinking and memory. This unique composition of nerve tissue allows the brain to perform its complex functions effectively. Other types of tissues such as connective, epithelial, and muscle tissues have distinct roles in the body. For instance, connective tissue provides structural support and connects different tissues and organs, while epithelial tissue forms protective layers and lines cavities. Muscle tissue is primarily involved in movement. However, none of these tissues play the predominant role in forming the brain’s structure and functionalities as nerve tissue does.