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Z A&P Summer Studying > Lecture #12 > Flashcards

Lecture #12 Flashcards

1
Q

What are two types of equallibrium?

A

Static and dynamic

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2
Q

What is static equilibrium?

A

Senses the position of the head when the body is not moving

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3
Q

What is dynamic equilibrium?

A

Senses rotation

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4
Q

How does static equilibrium work?

A

Basically it senses what direction gravity is pulling on the body

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5
Q

Where is dynamic equilibrium located?

A

In the three semicircular canals

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6
Q

What is a Krista ampullanis?

A

Sensory organ for dynamic equilibrium

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7
Q

How does Dramamine work?

A

It acts as an antihistamine for a type of neurotransmitter active in the vestibular neuron pathway

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8
Q

What are the four accessory structures for sight?

A

Eyelids, eyelashes, lacrimal apparatus, and extrinsic eye muscles

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9
Q

What does the lacrimal apparatus do?

A

Production of tears

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10
Q

What are the three layers of the eye?

A

The outer fibrous tunic, the middle vascular tunic, and the inner nervous tunic

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11
Q

What are the 2 structures of the outer fibrous tunic of the eye?

A

The cornea and the sclera

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12
Q

What does the cornea do?

A

It helps focus light And protects the eye

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13
Q

What does the sclera do?

A

It is the white of the eye so it protects the eye and attaches muscles

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14
Q

What is the anterior chamber of the eye?

A

It is located between the cornea and the lens and it contains fluid

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15
Q

What does the anterior chamber of the eye due/assistant in?

A

It focuses The eye and changes the shape of the eye

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16
Q

What are the three structures of the middle vascular tunic?

A

The choroid coat, ciliary body, and the iris

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17
Q

What does the choroid coat do?

A

Provides blood supply to the eye and contains melanocytes to absorb extra light

18
Q

What does the ciliary body do?

A

It is the thickest portion of the eye and it changes the shape of the lens

19
Q

What does the iris do?

A

It is in front of the lens and it is pigmented to control light entering the eye

20
Q

What is aqueous humor?

A

It is a fluid in the anterior chamber of the eye

21
Q

What does aqueous humor do?

A

It provides nutrients and maintains the shape of the eye

22
Q

What is aqueous humor secreted by?

A

Epithelium

23
Q

What does the ciliary body do?

A

Farms in internal ring around the front of the eye so it can change the eyes shape

24
Q

What is accommodation in eyesight?

A

Changing of the lens shape to view close objects

25
Q

What does the Eye do to focus on close objects?

A

The Lense thickens and becomes more convex

26
Q

What does the Eye do to focus on distant objects?

A

The lens thins and becomes flatter

27
Q

What is the function of the Eyes Iris?

A

It controls the amount of light that enters the eye

28
Q

What does the iris consist of?

A

Connective tissue and smooth muscle

29
Q

What is the pupil?

A

It is the opening at the center of the iris

30
Q

What determines eyecolor?

A

Melanin

31
Q

What does dim light stimulate in the eye?

A

It stimulates the radial muscles and the pupil dilates

32
Q

What does bright light stimulate in the eye?

A

It stimulates the circular muscles constricting the pupil

33
Q

What is in the inner nervous tunic of the eye?

A

The retina which contains photoreceptors

34
Q

What are the three areas of the retina?

A

The macula lutea, the optic disc, and the fovea centralis

35
Q

What is the macula lutea?

A

A yellowish spot in the retina that contains a very high concentration of cones

36
Q

What is the optic disk?

A

A blind spot which is caused by the beginning of the optic nerve which means no visual receptors are in that spot

37
Q

What is the Fovea centralis?

A

It is the center of the macula lutea and it produces the sharpest vision

38
Q

What is the posterior compartment of the eye enclosed by?

A

The lens, ciliary body, and the retina

39
Q

What does the posterior compartment of the eye hold/do?

A

It contains a gel that maintains the eyes shape

40
Q

What are the three major groups/layers of retinal cells?

A

Photoreceptor cells, bipolar cells, and ganglion cells

Z A&P Summer Studying (15 decks)

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