IC2 & 3

Question 1

Cell body of a neuron is called ______

Answer 1

Soma

Question 2

Depression is correlated with increased activity in the region of ______

Answer 2

Subgenual ACC

Question 3

Broca’s area and Wernicke’s area is found in the ____

Answer 3

Left hemisphere

Question 4

Damage to Broca’s area leads to difficulty in ______

Answer 4

expressing language

Question 5

Damage to Wernicke’s area leads to difficulty in ______

Answer 5

comprehending language

Question 6

Which structure is involved in declarative memory (e.g. recall)?

Answer 6

Hippocampus

Question 7

Which structure is important for emotional memory/ mood changes?

Answer 7

Amygdala

Question 8

3 major components in the skull

Answer 8

• brain
• blood
• CSF

Question 9

3 major components in the skull which contribute to ICP

Answer 9

• brain
• blood
• CSF

Question 10

Intracranial pressure (ICP) is generally measured as _____

Answer 10

CSF pressure

Question 11

Most of CSF is produced by _____ and the rest is secreted in the _____

Answer 11

Choroid plexus; interstitial space of brain

Question 12

CSF is reabsorbed through __________and _______

Answer 12

arachnoid granulation and dural sinus

Question 13

CSF is produced by ______ in choroid plexus

Answer 13

ependymal cells

Question 14

Nerve fibers carrying signal from PNS to CNS are ___

Answer 14

afferents

Question 15

Nerve fibers carrying signal from CNS to PNS are ___

Answer 15

efferents

Question 16

Thickly myelinated fibre

Answer 16

Aβ

Question 17

Thinly myelinated fibre

Answer 17

Aδ

Question 18

Unmyelinated fibre

Answer 18

C fibre

Question 19

Fibre that conduct touch signal

Answer 19

Aβ

Question 20

Fibres that conduct pain signal

Answer 20

Aδ and C

Question 21

Aβ, Aδ and C fibres belong to PNS or CNS?

Answer 21

PNS, as they carry signal from external stimuli from PNS to CNS

Question 22

Point of entry into CNS (from PNS)

Answer 22

Spinal cord

Question 23

Segments of spinal cord (top to bottom)

Answer 23

Cervical, thoracic, lumbar, sacral

Question 24

Alpha motor neurons are also known as_____

Answer 24

efferent neurons

Question 25

Action potential is area above ____

Answer 25

threshold

Question 26

What happens during upstroke of action potential

Answer 26

Opening of a class of channels in membrane = voltage gated sodium channel

Question 27

What happens during downstroke of action potential

Answer 27

* Inactivation of voltage gated sodium channel * Opening of voltage gated potassium channel

Question 28

Which ions have a greater conc inside the cell?

Answer 28

K+

Question 29

Which ions have a lower conc inside the cell?

Answer 29

Na+, Cl-, Ca2+

Question 30

At RMP, there is ____ of ions

Answer 30

continuous diffusion

Question 31

Is movement of individual in balance (equilibrium) at RMP?

Answer 31

No! RMP reflects the net charge of all ions across the membrane

Question 32

When is movement of an ion at equilibrium?

Answer 32

At equilibrium potential

Question 33

Is conduction of action potential faster for myelinated or unmyelinated axons?

Answer 33

Myelinated

Question 34

______ are involved in mood disorder, such as depression anxiety

Answer 34

prefrontal cortex and amygdala

Question 35

Pain pathway from spinal cord is also known as

Answer 35

spinothalamic Pathway

Question 36

Touch pathway is also known as

Answer 36

dorsal column pathway

Question 37

Topographic lines meaning

Answer 37

different population of afferent relay information from different regions

Question 38

Significance of intensity of stimulus

Answer 38

the more intense the stimulus, more is the number of action potentials per unit time (frequency) and more intense will be the sensation

Question 39

Code that reports intensity

Answer 39

population code (aka frequency code)

Question 40

what is enkephalin

Answer 40

endogenous morphine

Question 41

A class of neurons in basal ganglia are ___

Answer 41

dopamine neurons