sensory

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Questions and Answers

Which part of the ear receives sound waves?

Tympanic membrane

Cochlea

Pinna

Auricle (correct)

What is the function of the lacrimal glands?

Produce fluid for the conjunctiva

Produce fluid for tear film (correct)

Produce fluid for the tarsal glands

Produce fluid for the cornea

Where are the lacrimal glands located?

Upper nasal portion of the orbit

Lower nasal portion of the orbit

Upper temporal portion of the orbit (correct)

Lower temporal portion of the orbit

Which of the following sensory organs is responsible for mediating the sense of touch in the skin?

Mechanoreceptors Signup and view all the answers

Where are taste buds primarily located on the tongue?

Vallate papilla Signup and view all the answers

What are the cell types found in taste buds?

Gustatory (taste) cells, supportive cells, and basal stem cells Signup and view all the answers

Which type of corpuscle is primarily found in the skin of the penis and clitoris?

Krause end bulbs Signup and view all the answers

Which of the following is NOT one of the learning objectives of ANAT2241 Histology: Basic & Systematic Sensory Organs?

To understand the function and components of eyeball Signup and view all the answers

What is the recommended reading for ANAT2241 Histology: Basic & Systematic Sensory Organs?

Textbook chapter (Junqueira’s Basic Histology: Text and Atlas, 16e online): The Eye & Ear: Special Sense Organs Signup and view all the answers

What are the three parts of the ear that students are expected to understand in ANAT2241 Histology: Basic & Systematic Sensory Organs?

External ear, middle ear, and inner ear Signup and view all the answers

Which part of the ear is responsible for maintaining equilibrium?

Vestibular organ Signup and view all the answers

What is the composition of the tympanic membrane or eardrum?

Epidermis, fibroelastic connective tissue, and simple cuboidal epithelium Signup and view all the answers

Which part of the ear is lined with mucosa composed of simple cuboidal epithelium and lamina propria?

Middle ear or tympanic cavity Signup and view all the answers

Where are the hair cells located in the ear?

Maculae in the utricle and saccule, cristae ampullares in the semicircular ducts, and the organ of Corti in the cochlear duct Signup and view all the answers

Which layer of the eye is responsible for preventing light from entering the eye?

Vascular layer Signup and view all the answers

Which cells in the retina are responsible for vision in low light conditions?

Rod cells Signup and view all the answers

What is the function of the lamellated (Pacinian) corpuscles in the eye?

Sensing coarse touch Signup and view all the answers

What is the purpose of the vitreous body in the eye?

Providing support to the eye Signup and view all the answers

Study Notes

Anatomy of the Eye: Structures and Functions

Lamellated (Pacinian) corpuscles are large oval structures located deep in the reticular dermis and hypodermis, and are responsible for sensing coarse touch, pressure, and high-frequency vibrations.
The eye is composed of three concentric tunics or layers: fibrous layer, vascular layer (uvea), and retina.
The fibrous layer consists of the sclera, which is the tough external layer, and the cornea, which is the transparent avascular anterior part.
The vascular layer, or uvea, includes the choroid, ciliary body, and iris. The choroid is a well-vascularized layer that prevents light from entering the eye, while the ciliary body consists of smooth muscle fibers that affect the shape of the lens. The iris, which covers part of the lens, determines the color of the eye.
The retina is composed of two layers: the pigmented layer, which absorbs scattered light and forms part of the protective blood-retina barrier, and the neural layer, which contains various neurons and photoreceptors.
The neural layer of the retina consists of nine distinct layers, including the rod and cone layer, outer limiting layer, outer nuclear layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglionic layer, nerve fiber layer, and inner limiting membrane.
The rod cells in the retina are extremely sensitive to light and allow for vision in low light conditions, while the cone cells produce color vision in bright light.
Specialized areas of the retina include the optic disc (blind spot), fovea centralis (area of maximal visual acuity), and macula lutea (area with carotenoids that protect cone cells).
The lens is a transparent, avascular, biconvex structure located behind the iris, and it focuses light onto the retina. It is held in place by the ciliary zonule and can change shape for visual accommodation.
The vitreous body is a gel-like connective tissue that occupies the large vitreous chamber behind the lens, providing support to the eye.
Accessory structures of the eye include the conjunctiva, which is a thin mucosa that covers the sclera and inner surface of the eyelids, the eyelids, which are pliable and protective structures consisting of skin, muscle, tarsus, and sebaceous glands, and the lacrimal glands, which produce tears for lubrication.
The eye is a complex organ with various structures and functions that allow for vision and perception of the surrounding environment.

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Description

Test your knowledge of the anatomy of the eye with this quiz! Explore the different structures and functions involved in vision and perception. From the fibrous layer to the neural layer of the retina, learn about the specialized areas and accessory structures that make up this complex organ. Challenge yourself and see how well you understand the anatomy of the eye!