Bio 109 brain Study Questions and Correct Answers Guaranteed A+

Bio 109 brain Study Questions and Correct
Answers Guaranteed A+!
Meninges

membranes that help protect the brain and spinal cord

dura mater

outer layer, fibrous connective tissue, physical protection

arachnoid mater

middle layer, web-like membrane

pia mater

inner, very thin, nerves, blood vessels surface of brain

(CSF)cerebrospinal fluid

clear watery fluid between the arachnoid and pia mater

CSF - maintain stable ionic concentration in the CNS

- supplies nutrients to the brain tissue

- supplies information to ANS centers in hypothalamus and brainstem

- surrounds the brain and spinal cord - absorb force

- gives buoyancy to the brain (reduces weight by ~97%)

choroid plexuses

a group of specialized capillaries that secretes cerebrospinal fluid into a ventricle

- the choroid plexuses has a similar function as the astrocytes

, in the blood brain barrier..........acts as a barrier between the

blood and the brain's interstitial fluid

ventricles

cavities found in the brain and brainstem

Cerebrum

- Initiates motor commands to skeletal muscle

- Interpret impulses from sensory organs

- Store information as memory

- Reasoning - thinking

- Primary motor regions

Hemispheres

left or right

sulcus

grooves

gyri

ridges

cerebral cortex

gray matter

cerebral medulla