Sensory Systems Classification

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Questions and Answers

Which cranial nerve is associated with the sense of smell?

Facial (VII)

Optic (II)

Olfactory (I) (correct)

Vestibulocochlear (VIII)

Which spinal nerve plexus innervates the hip and lower limbs?

Sacral plexus

Lumbar plexus (correct)

Brachial plexus

Cervical plexus

What type of neurons are found in the ventral root of a spinal nerve?

Sympathetic trunk ganglion neurons

Axons of sensory neurons

Autonomic and somatic motor neurons (correct)

Cell bodies located in dorsal root ganglia

Which spinal nerve connects to the diaphragm?

Phrenic nerve Signup and view all the answers

What surrounds each individual axon and myelin in a spinal nerve?

Endoneurium Signup and view all the answers

Which structure controls the shape of the lens and causes the lens to focus?

Ciliary muscles Signup and view all the answers

What is the function of the fovea centralis?

Area of greatest visual acuity Signup and view all the answers

Which part of the eye is avascular and transparent?

Lens Signup and view all the answers

What causes the tympanic membrane to vibrate?

Sound waves Signup and view all the answers

Which structure links the middle ear with the nasopharynx?

Eustachian tube Signup and view all the answers

What is the function of the bony labyrinth in the inner ear?

Detect sound and important for equilibrium Signup and view all the answers

What is found in the cochlear duct?

Hair cells with cilia Signup and view all the answers

What separates the cochlear duct from the scala tympani?

Basilar membrane Signup and view all the answers

What is responsible for sending electrical impulses to the brain via cranial nerve VIII (vestibulocochlear nerve)?

Hair cells with cilia Signup and view all the answers

What type of stimuli do interoceptors detect?

Internal stimuli in viscera and blood vessels Signup and view all the answers

Which stimuli do mechanoreceptors respond to?

Mechanical stimuli like pressure and touch Signup and view all the answers

How many successive neurons do spinal pathways consist of?

Three successive neurons Signup and view all the answers

Which tracts are included in the ascending tracts of spinal pathways?

Posterior (dorsal) column pathways, spinocerebellar pathways, and corticospinal pathways Signup and view all the answers

What are the effectors of the Autonomic Nervous System?

Cardiac muscle, smooth muscle, and glands Signup and view all the answers

What does the Somatic Nervous System involve?

Upper and lower motor neurons for skeletal muscle control Signup and view all the answers

What are the subdivisions of the Autonomic Nervous System?

Sympathetic NS and Parasympathetic NS Signup and view all the answers

What are the differences between Sympathetic NS and Parasympathetic NS?

Differences in cell body of preganglionic neuron, autonomic ganglia location, axon length, function, and nerve exit points. Signup and view all the answers

What is the superficial layer of the eye called?

Fibrous tunic Signup and view all the answers

Study Notes

Sensory Systems Classification

Interoceptors detect internal stimuli in viscera, blood vessels, etc.
Mechanoreceptors respond to mechanical stimuli like pressure, touch, stretch, and vibration.
Spinal pathways consist of three successive neurons: 1st order neurons, 2nd order neurons, and 3rd order neurons.
Ascending tracts of spinal pathways include posterior (dorsal) column pathways, spinocerebellar pathways, and anterolateral (spinothalamic) pathways.
The motor systems include the Somatic Nervous System and the Autonomic Nervous System.
The Somatic Nervous System involves upper and lower motor neurons for skeletal muscle control.
The Autonomic Nervous System has preganglionic and postganglionic neurons, with the effectors being cardiac muscle, smooth muscle, and glands.
The Autonomic Nervous System is subdivided into the sympathetic NS and the parasympathetic NS, which have different functions.
Comparison of Sympathetic NS and Parasympathetic NS includes differences in the cell body of preganglionic neuron, autonomic ganglia location, axon length, function, and nerve exit points.
The eye is a three-layered sphere filled with fluid, with the fibrous tunic as the superficial layer.
The fibrous tunic includes the sclera, cornea, and conjunctiva, serving as protective and light-permitting structures for the eye.

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Description

Test your knowledge of sensory systems and motor systems, including interoceptors, mechanoreceptors, spinal pathways, and the autonomic and somatic nervous systems.