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Figure 12.1Sensory Receptors in Skin Free nerve endings Thermo-, light touch, and pain receptors Modified and encapsulated nerve endings Merkel disks: light touch Hair Free nerve endings

Figure 12.1

Sensory Receptors in Skin

Free nerve endings

Thermo-, light touch, and pain receptors

Modified and encapsulated nerve endings

Merkel disks:

light touch

Hair

Free nerve endings:

sense changing position

of hairs

Meissner’s corpuscle:

light touch

Pacinian corpuscle:

deep pressure and high- frequency vibration

Figure 12.5d

Locations and Structure of the

Receptors for Taste

Figure 12.6

Olfactory Receptors and the

Mucus-Producing Olfactory Glands

Figure 12.9

Structure of the Human Ear

Figure 12.10

Structures and Function of the

Cochlea

Figure 12.13a–c

Sensing Head Position and

Acceleration

Vitreous humor

Retina Fovea

Optic disk Optic nerve

Figure 12.16a

Examples of Abnormal Vision

Figure 12.16b

Examples of Abnormal Vision

Figure 12.16c

Examples of Abnormal Vision

Figure 12.16d

Examples of Abnormal Vision

Figure 12.17

Structure of the Retina

• Receptors and Sensations

A Each receptor is more sensitive to a

specific kind of environmental change but is less sensitive to

others.

receptor

Anatomy of the Brain

Motor and Sensory areas of the left Cerebral Cortex

Inferior view of the brain

Cranial Nerves

Sensory afferent pathway through the dorsal root

Motor efferent pathway through the ventral root

Referred Pain

Visceral pain may be felt at these surface regions

Visceral pain may be felt at these surface regions

Notice each nerve path

Corticospinal

Motor path away from brain Toward muscle or gland

Mechanoreceptors of the body

Chemoreceptors of the body

CopyrightThe McGraw-Hill Companies, Inc Permission required for reproduction or display

CopyrightThe McGraw-Hill Companies, Inc Permission required for reproduction or display

C Structure of the Eye

sphere with three distinct layers,

or tunics

Lateral

Light pathway

Retina

Light pathway

Know the layers/tunics of the EYE!

Retina(Neural tunic)Fibrous tunic

Choroid tunic

Visual nerve pathway

IMAGE sent to cerebral cortex

Cerebral cortex

Figure 10.7

1- Sound waves reach tympanic membrane

2- the movement of the tympanic membrane causes the ossicle to move

3- The stapes moves the fluid within the vestibular duct

4,5 &6 fluid movement causes mechanoreceptors to send signal

Anatomy of the chochlea

Mechanoreceptors (hair cells) located here