Ogunkua

Question 1

propioception

Answer 1

…

Question 2

_____ are nerve cells and _____ are the supporting cells

Answer 2

neurons; neuroglia(glia)

Question 3

6 categories of nerve cells

Answer 3

1- unipolar mesencephalic nucleus of Cr.V
2- retinal bipolar cell
3- retinal ganglion cell
4- retinal amarcrine cell
5- cortical pyramidal cell
6- cerebellar purkinje cell

Question 4

3 categories of neuroglia (MOA)

Answer 4

1- astrocyte
2- oligodendrocyte
3- microglia

Question 5

cytoskeletal elements in neurons

Answer 5

1- tubulin
2- tau
3- actin
4- astroglia

Question 6

tubulin

Answer 6

• cell body, axon, dendrites

Question 7

tau

Answer 7

• microtubule binding protein

- only present in axon

Question 8

actin

Answer 8

• growing of tip of axon and dendrite

Question 9

astroglia/astrocytes

Answer 9

• star shaped

- located in the cortex?

Question 10

neuropil

Answer 10

synaptic connections that define neural circuits are made in a dense tangle of dendrites, axon terminals and glial cells which together constitute the neuropil
- is a broad term defined as any area in the nervous system composed of mostly unmyelinated axons, dendrites and glial cell processes that forms a synaptically dense region containing a relatively low number of cell bodies.

Question 11

nerve ending

Answer 11

…

Question 12

what are the 2 morphological classifications of nerve endings?

Answer 12

simple and compound

Question 13

what is the structure of simple nerve endings?

Answer 13

…

Question 14

free nerve endings

Answer 14

• sensory receptors or specialized cell which convert (transduce) stimuli from the external or internal environments into afferent nerve impulses
• temp, touch and pain
• found along dermal epidermal layer

Question 15

what are the 3 functional classifications of sensory receptors?

Answer 15

1- exteroreceptors
2- prioprioceptors
3- interoceptors

Question 16

exteroreceptors

Answer 16

respond to stimuli from outside the body: touch, light pressure, deep pressure, cutaneous pain, temperature, smell, taste, sight and hearing

Question 17

proprioceptors

Answer 17

located within the skeletal system and provide conscious and unconscious information about orientation

Question 18

interoreceptors

Answer 18

respond to stimuli from the viscera and include the chemoreceptors of blood, vascular (pressure) baroreceptors, the state of distension of hollow viscera such as the gastrointestinal tract and urinary bladder and receptors for such nebulous senses as visceral pain, thirst, well being and malaise

Question 19

simple receptors

Answer 19

mere free, branched or un-branched nerve endings such as those responsible for cutaneous pain and temperature; rarely visible with light microscope unless special staining methods are employed

Question 20

compound receptors

Answer 20

involves organization of non-neural tissues to complement the function of the neural receptors. Degree of organization may range from mere encapsulation to highly sophisticated arrangements such as in the eye and ear. Tradition, the eye, ear and receptors for the sense of smell and taste are described as organs of special sense

Question 21

meissner’s corpuscles

Answer 21

• involved in light discriminatory touch
• degree of discrimination depends on proximity of receptors to one another
• found in dermis of skin, lips, genitalia, fingertips, soles of the feet, nipples, eyelids

Question 22

pacinian corpuscles

Answer 22

• looks like onion rings
• encapsulated sensory receptors responsive to pressure or coarse touch, vibration and tension
• found in deeper layer of the skin, ligaments and joint capsules, mesenteries, some viscera and in some erogenous areas

Question 23

ruffini corpuscles and krause end bulbs

Answer 23

…

Question 24

Ruffini corpuscles

Answer 24

…

Question 25

oligodendrocytes

Answer 25

• fried egg shaped?

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