Nervous System Concepts and Functions

This video tutorial covers the nervous system, focusing on its role in control and coordination. It explains the structure and function of neurons and neuroglia, and classifies neurons by structure and function. The central nervous system, including the brain and spinal cord, is detailed, along with the peripheral nervous system's sensory and motor divisions. Reflex arcs and sensory receptors are discussed, and the video concludes with an overview of cranial and spinal nerves for honors students.

What is the primary role of the nervous system in the body?

• To digest food

• To control and coordinate body functions

• To produce hormones

• To circulate blood

Which cells make up 90% of the nervous tissue and provide support to neurons?

• Neurons

• Glial cells

• Muscle cells

• Epithelial cells

What is the function of dendrites in a neuron?

• To insulate the neuron

• To receive signals from other neurons

• To transmit signals away from the neuron

• To store energy

How are neurons classified based on their structure?

• By their color

• By their location in the body

• By their size

• By the number of processes extending from the cell body

Which type of neuron transmits information from sensory receptors to the central nervous system?

• Motor neurons

• Interneurons

• Sensory neurons

• Glial cells

What are the two main divisions of the nervous system?

• Sympathetic and Parasympathetic

• Somatic and Autonomic

• Sensory and Motor

• Central and Peripheral

Which division of the peripheral nervous system is responsible for voluntary movements?

• Autonomic

• Sympathetic

• Parasympathetic

• Somatic

What is a reflex arc?

• A part of the brain

• A type of neuron

• A pathway that controls a reflex

• A voluntary action

Which type of receptor responds to mechanical forces like pressure and vibration?

• Thermoreceptors

• Mechanoreceptors

• Chemoreceptors

• Photoreceptors

What is the difference between innate and learned reflexes?

• Innate reflexes are automatic and predictable, while learned reflexes result from practice.

• Innate reflexes are learned through experience, while learned reflexes are automatic.

• Innate reflexes require conscious thought, while learned reflexes do not.

• Innate reflexes are slower than learned reflexes.