BIO 201 - EXAM 4 – ASU LATEST 2024 FORM A REAL EXAM QUESTIONS AND CORRECT ANSWERS (ALL ARE CORRECT) A GRADE
9 views 0 purchase
Course
BIO 201 – ASU
Institution
BIO 201 – ASU
BIO 201 - EXAM 4 – ASU LATEST 2024 FORM A REAL EXAM QUESTIONS AND CORRECT ANSWERS (ALL ARE CORRECT) A GRADE
Two Parts of Blood Barrier System - Answer-Blood-Brain Barrier
- Blood capillaries throughout the brain tissue.
- Tight junctions between endothelial cells.
- Astrocytes reach out a...
BIO 201 - EXAM 4 – ASU LATEST 2024
FORM A REAL EXAM QUESTIONS AND
CORRECT ANSWERS (ALL ARE
CORRECT) A GRADE
Two Parts of Blood Barrier System - Answer-Blood-Brain Barrier
- Blood capillaries throughout the brain tissue.
- Tight junctions between endothelial cells.
- Astrocytes reach out and contact capillaries with their perivascular feet.
Blood-CSF Barrier
- Capillaries of the choroid plexus.
- ependymal cells
Blood-Brain Barrier* - Answer-Tightly Joined Endothelium
- Permeable to lipid-soluble materials.
- Alcohol, O2, CO2, nicotine, and anesthetics.
Circumventricular Organs in 3rd and 4th ventricles are breaks in the barrier where blood
has direct access
- Monitoring of glucose, pH, osmolarity, and other variations.
- Allows route for HIV virus to invade the brain
3 Parts of the Hind Brain - Answer-- Medulla Oblongata
- Pons
- Cerebellum
Medulla Oblongata - Answer-- Begins at foramen Magnum of the skull.
- 3 cm extension of spinal cord.
- Ascending and descending nerve tracts.
- Nuclei of sensory and motor CNs (IX, X, XI, XII)
- Control center of homeostasis.
Centers of the Medulla Oblongata - Answer-Cardiac Center
- Adjusts rate and force of heart.
Vasomotor Center
- Adjusts blood vessel diameter.
Respiratory Centers
- Control rate and depth of breathing
Reflex Centers
, - Coughing, sneezing, gagging, swallowing, vomiting, salivation, sweating, movements
of tongue and head.
Anatomy of Medulla Oblongata - Answer-Pyramids: contain descending fibers called
corticospinal tracts.
- Carry motor signals to skeletal muscles.
Inferior Olivary Nucleus: Relay center for signals to cerebellum.
Reticular Formation: Loose network of nuclei extending throughout
- The medulla, pons, and midbrain.
- Contains cardiac, vasomotor, and respiratory centers.
Pons - Answer-- Bulge in brainstem.
- Rostral to the medulla.
- Ascending sensory tracts.
- Descending motor tracts.
- Pathways in & out of cerebellum
- Cranial nerves V, VI, VII, VIII
- Sensory roles: hearing, equilibrium, taste, facial sensations.
- Motor roles: eye movement, facial expressions, chewing, swallowing, urination, and
secretion of saliva and tears.
- Reticular formation in pons contains additional nuclei concerned with sleep,
respiration, and posture.
Cerebellum - Answer-- Right and left hemispheres connected by vermis*
- Parallel surface folds called folia are gray matter
- Cerebellar peduncles - three pairs of stalks that connect the cerebellum to the
brainstem.
- Consist of thick bundles of nerve fibers that carry signals to and from the cerebellum
- Arbor Vitae (white matter) visible in sagittal section
Cerebellar Functions - Answer-- Monitors muscle contractions.
- Aids in motor coordination.
- Evaluation of sensory input
- Comparing textures w/o seeing them.
- Spatial perception and comprehension of different views of 3d objects belonging to
the same object.
- Timekeeping Center
- Predicting movement of objects
- Helps predict how much the eyes must move in order to compensate for head
movements and remain fixed on an object.
- Hearing - distinguish pitch and similar sounding words.
- Planning and scheduling tasks
- Lesions may result in emotional overreactions and trouble with impulse control
- many children with ADHD have small cerebrums.
The Midbrain - Answer-- Short segment of brainstem - connects hindbrain to forebrain.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Perfectscorer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
