Exploring the Human Nervous System: Spinal Cord and Periphery

The video tutorial explains the human nervous system, highlighting the central and peripheral systems. It delves into the structure of nerve cells, synaptic transmission, and the role of sensory receptors. The tutorial also covers reflex actions and the processing of stimuli in the brain.

What are the two main divisions of the human nervous system?

• Central and Peripheral

• Autonomic and Somatic

• Sympathetic and Parasympathetic

• Sensory and Motor

What protects the brain and spinal cord?

• Skin and Hair

• Blood and Lymph

• Skull and Spinal Column

• Muscles and Tendons

What is the function of afferent nerve fibers?

• Conduct impulses to muscles

• Conduct impulses from the central nervous system to sensory receptors

• Conduct impulses to glands

• Conduct impulses from sensory receptors to the central nervous system

What is the role of Schwann cells in nerve fibers?

• Store neurotransmitters

• Increase conduction speed of impulses

• Generate electrical impulses

• Decrease conduction speed of impulses

What is the function of dendrites in a nerve cell?

• Transmit impulses to muscles

• Generate neurotransmitters

• Receive stimuli

• Store calcium ions

What triggers the opening of calcium channels in terminal buttons?

• Thermal stimulus

• Electrical impulse

• Chemical stimulus

• Mechanical stimulus

What process allows neurotransmitters to be transported out of the cell?

• Pinocytosis

• Exocytosis

• Phagocytosis

• Endocytosis

Which type of receptor is rapidly adapting and responds to changes in pressure?

• Rufini corpuscles

• Merkel cells

• Pacinian corpuscles

• Meissner's corpuscles

Where are the cell bodies of sensory neurons located?

• In the brain

• In the skin

• In the spinal ganglion

• In the muscles

What is the function of the somatosensory cortex?

• Generate motor impulses

• Process sensory information

• Store neurotransmitters

• Regulate blood flow