Nervous System 4

Question 1

Sensory neurons have structures that response to a stimulus are called

Answer 1

Receptors

Question 2

What are connected to the neuron by dendrites

Answer 2

Receptors

Question 3

What are the two type of senses

Answer 3

General and special senses

Question 4

What type of sense is the receptors for these are widely distributed throughout the body: example skin organs joints

Answer 4

General senses

Question 5

What type of sense are specialized receptors that are confined to structures in the head ex: eyes ears

Answer 5

Special senses

Question 6

The stimulation of a receptor results in an action potential, impulses are carried from the PNS by afferent (sensory) neurons toward the CNS, the CNS analyzes and interprets the impulses

Answer 6

Sensory impulses

Question 7

Are all nerve impulses (action potentials) that travel from a sensory receptor to the CNS the same??

Answer 7

Yes

Question 8

The part of the cerebral cortex that receives the impulse determines

Answer 8

What the sensation is

Question 9

The intensity (strength) of a stimulus is interpreted in the brain by

Answer 9

The rate ( frequancy) of the Impulses (action potential) reaching the brain

Question 10

If a stimulus is constant for a period of time then

Answer 10

A receptor may or will adapt

Question 11

In adaptive response what adapts quickly. Ie touch, temp. Receptors»
Not feeling your clothes

Answer 11

Phasic adaptors

Question 12

In adaptive response what adapts slowly or not at all ie pain receptors

Answer 12

Tonic adaptors

Question 13

Chemoreceptors, nocireceptors, photoreceptors, thermoreceptors, mechanorecptors are

Answer 13

Types of receptors

Question 14

What receptor type respond to changes in chemical substances - smell, taste, oxygen levels

Answer 14

Chemoreceptors

Question 15

What receptor type respond to tissue damage from: mechanical, electrical, thermal, chemical

Answer 15

Nocireceptors (pain)

Question 16

What receptor type respond to light energy

Answer 16

Photoreceptors

Question 17

What receptor type respond to the Changes in temperature

Answer 17

Thermoreceptors

Question 18

Proprioreceptors, barorecptors, and stretch receptors are three types of

Answer 18

Mechanorecptors

Question 19

What mechanorecptor respond to change in positions

Answer 19

Propriorecptors

Question 20

What mechanorecptor respond to change in pressure

Answer 20

Barorecptors

Question 21

What mechanorecptor are used in organs and muscles

Answer 21

Stretch receptors

Question 22

Receptors for the _______ are widely distributed throughout the body

Answer 22

General senses

Question 23

Exteroreceptive and visceroreceptivre are what type of senses

Answer 23

General senses

Question 24

What general sense changes occurring at the bodies surfaces

Answer 24

Exteroreceptive

Question 25

What general sense changes occurring in the viscera (organs)

Answer 25

Visceroreceptivre

Question 26

What type of senses are smell, taste, hearing, equilibrium, and sight

Answer 26

Special senses

Question 27

What is the organ of hearing

Answer 27

The ear

Question 28

Of the hearing sense what is the section of the ear that external structures to tympanic membrane (eardrums) and gathers and transmits sound vibrations to internal structures

Answer 28

Outer section

Question 29

Of the hearing sense what is the section of the ear is a air filled cavity within the temporal bone of the skull also contains 3 auditory ossicles malleus, incus, stapes and transmit & amplifies sound vibrations to the inner ear

Answer 29

Middle section

Question 30

Of the hearing sense what is the section of the ear is the system of inter- communicating chambers

Answer 30

Inner section

Question 31

Of the inner section of the hear what functions in hearing

Answer 31

Cochlea

Question 32

Of the inner section of the hear what functions in equilibrium

Answer 32

Semicircular canals, and vestibule

Question 33

1. Sound waves enter external ear. 2. Sound pressures cause tympanic membrane to produce vibrations. 3. Auditory ossicles amplify and transmit vibrations to the cochlea. 4. Specialized receptor cells (hair cells) in the cochlea respond to different frequencies of vibrations. 5. Hair cells respond by releasing neurotransmitters. 6. Neurotransmitters stimulate sensory neurons in cranial nerve VII. 7. Impulses travel along the cranial nerve VII to the auditory cortex in temporal lobe for interpretation are

Answer 33

Mechanism of hearing

Question 34

Of the static equilibrium the _____ senses the position of head when body is NOT moving also has specialized receptor cells (hair cells)

Answer 34

Vestibule

Question 35

Of the dynamic equilibrium the ______ senses rotation and movement of head body, has three canals at right angles, has specialized receptor cells (hair cells)

Answer 35

Semicircular

Question 36

The function of visual receptors located in the eyes also termed photoreceptors

Answer 36

Sight

Question 37

Eyelids, lacrimal apparatus, and extrinsic ocular muscles are the _______ of sight

Answer 37

Accessory organs

Question 38

In sight what is performed by the visual cortex in the occipital lobes

Answer 38

Interpretation of visual stimuli

Question 39

In the outer layer of eye what is anterior 1/6, bulges outward and transparent due to lack of blood vessels and the extremely regular pattern of the connective tissue fibers also helps focus entering light

Answer 39

Cornea

Question 40

In the outer layer of the eye what is posterior 5/6, white portion of the eye, protects the eye, attachment site for extrinsic muscles

Answer 40

Sclera

Question 41

In the middle layer of the eye what contains the ciliary muscles & ciliary process • suspensory ligaments off the ciliary process hold the lens in place

Answer 41

Ciliary body

Question 42

Of the middle layer of the eye a thin diaphragm of connective tissue and smooth muscles , the color portion of the eye, the pupil- center opening

Answer 42

Iris

Question 43

In the inner layer of the eye what contains the visual receptors, continuos with the optic nerve, dense capillary network

Answer 43

Retina

Question 44

In the inner layer of the eye the central region of the retina, produces the sharpest vision

Answer 44

Macula lutea

Question 45

Of the inner layer of the eye it's medial to macula lutea, nerve fibers leave the eye and become part of the optic nerve, does not contain receptor cells (blind spot)

Answer 45

Optic disc

Question 46

Photoreceptors are modified neurons two distinct types

Answer 46

Rods | Cones

Question 47

What photoreceptor have long, thin projections at their terminal , contains light- sensitive visual pigments, more sensitive to light than comes, also produce colorless vision

Answer 47

Rods

Question 48

What photoreceptor have short, blunt projections at their terminal end, produce sharp images, responsible for the color in vision

Answer 48

Cones

Question 49

Of the photoreceptor in cones what depends upon which set of cones the light from an image stimulates

Answer 49

Color perceived