Functions of the Nervous System

The video tutorial explores the development of the nervous system in embryos, focusing on the roles of the mesoderm and somites in forming body structures. It explains the somatic nervous system, responsible for external stimuli response, and the visceral nervous system, which manages internal organ functions. The anatomy of spinal nerves, including their sensory and motor components, is also detailed.

What does the dorsal nerve cord develop into?

• The digestive system

• The central nervous system

• The peripheral nervous system

• The circulatory system

What does the paraxial mesoderm develop into?

• The somites

• The nervous system

• The endoderm

• The ectoderm

Which of the following is NOT derived from somites?

• Skeletal tissue

• Skeletal muscle

• Dermis of the skin

• Liver

What type of neurons are involved in the somatic nervous system?

• Visceral afferent and efferent

• Peripheral afferent and efferent

• Somatic afferent and efferent

• Central afferent and efferent

What is the primary function of somatic afferent neurons?

• To transmit motor signals to muscles

• To carry sensory information to the central nervous system

• To regulate blood pressure

• To control digestive processes

What is the role of the visceral nervous system?

• To regulate body temperature

• To control voluntary muscle movements

• To innervate internal organs and smooth muscles

• To process visual information

Which type of fiber is associated with the dorsal aspect of the spinal cord?

• Visceral fibers

• Sensory fibers

• Motor fibers

• Autonomic fibers

What is the function of the dorsal root ganglion?

• To house motor neuron cell bodies

• To contain sensory neuron cell bodies

• To connect the brain to the spinal cord

• To regulate heart rate

What is the primary role of the ventral root of a spinal nerve?

• To process auditory information

• To regulate hormone secretion

• To transmit motor signals from the spinal cord

• To carry sensory information to the brain

What does the anterior ramus of a spinal nerve innervate?

• Only the back muscles

• The majority of the body

• The brain

• The heart