The Brain

Question 1

Types of tissues

Answer 1

Grey matter and WHITE matter

Question 2

Grey matter

Answer 2

Cell bodies, dendrites, and short unmyelinated axons. Outer parts of brain and inner parts of spinal cord

Question 3

White matter

Answer 3

Myelinated axons. Inner part of brain and outer part of spinal cord

Question 4

Meninges

Answer 4

Tough elastic tissue enclosing brain and spinal cord. Dura mater ( outer layer) arachnoid (middle) pia mater (inner)

Question 5

Outer layer of meninges

Answer 5

Dura mater

Question 6

Pia mater

Answer 6

Inner layer. Touching brain

Question 7

Cerebrospinal fluid

Answer 7

Made from water in bloodstream circulates in subarachnoid space and is replaced 4 times aday. Acts as a shock absorber and cushion circulates hormones nutrients white blood cells, etc. Across blood brain barrier

Question 8

Blood brain barrier

Answer 8

Separation b/w blood and CNS o capillaries have tight junctions - each capillary cell’s tightly fused to one beside it so substances can’t move b/w cells. Most transport through specific protein carriers o however, lipid soluble molecules can diffuse through the membraneI for example - caffeine, nicotine, alcohol, eat.

Question 9

Arachnoid

Answer 9

Middle layer

Question 10

Forebrain

Answer 10

Cerebrum, cerebral cortex

Question 11

Cerebrum

Answer 11

Largest part of brain divided into left and right hemispheres

Question 12

Cerebral cortex

Answer 12

Outer sheet of neurons on surface of cerebrum made of grey matter that has deep fissures (folds to increase SA ) coordinating center for sensory info and voluntary motor actions ↑ folds = ↑ function

Question 13

Right brained

Answer 13

Artistic side

Question 14

Left brained

Answer 14

Logical side

Question 15

Lobes

Answer 15

Occipital, temporal- parietal, frontal

Question 16

Occipital lobes

Answer 16

Receives and analyzes visual info

Question 17

temporal lobes

Answer 17

bottom. auditory reception, visual and verbal memories, understanding speech, smell

Question 18

parietal lobes

Answer 18

upper. receives and processes sensory info from the skin (somatosensory cortex) spatial awareness, taste

Question 19

frontal lobes

Answer 19

conscious thought, intelligence, memory, personality, precise voluntary motor mvmt

Question 20

homonculus

Answer 20

representation of what body part wld look like if number of neurons associated matched the size of body part

Question 21

broca’s area

Answer 21

speaking ability (LH)

Question 22

wernick’s area

Answer 22

language comprehension area (LH) could speak but it’s gibberish

Question 23

corpus callosum

Answer 23

connects RH n LH. thick band of axons.

Question 24

thalamus

Answer 24

major integrating centre of brain. sorts and directs incoming sensory info