The Peripheral Nervous System: Nerves and Sensory Organs

The video tutorial explains the peripheral nervous system, its divisions, and its role as the interface between the human body and its surroundings. It covers the sensory system, detailing various receptors and their functions. The video also provides a brief overview of sensory organs like eyes, nose, tongue, and ears, and their roles in perception. Finally, it discusses the structure of nerves, including cranial and spinal nerves, and their function in transmitting information.

What is the primary role of the peripheral nervous system?

• To control involuntary actions

• To connect the brain and spinal cord

• To process information within the brain

• To act as an interface between the body and the environment

Which division of the peripheral nervous system is responsible for sensing the environment?

• Autonomic division

• Sensory division

• Central division

• Motor division

What type of receptor responds to temperature changes?

• Chemoreceptors

• Photoreceptors

• Thermoreceptors

• Mechanoreceptors

Which sensory organ is primarily responsible for detecting volatile substances?

• Nose

• Eyes

• Tongue

• Ears

What is the function of the cochlea in the ear?

• To detect light

• To regulate balance

• To convert sound waves into nerve impulses

• To process taste

Which part of the eye is responsible for focusing light onto the retina?

• Pupil

• Iris

• Lens

• Cornea

What is the role of the endoneurium in a nerve?

• To enclose the entire nerve

• To bind groups of fibers into fascicles

• To surround individual axons

• To transmit impulses

What type of nerve transmits impulses away from the central nervous system?

• Sensory nerve

• Motor nerve

• Cranial nerve

• Mixed nerve

How many pairs of cranial nerves are associated with the brain?

• 24 pairs

• 31 pairs

• 12 pairs

• 15 pairs

What is the primary function of spinal nerves?

• To control the heart rate

• To connect the brain to sensory organs

• To transmit impulses to and from the spinal cord

• To regulate involuntary actions