.png){kind=logo}
PDF Download
BISC439: EXAM 1
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -100 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: BMP receptors
Answer:
activin receptors
Question 2: main steps of formation and regionalization of the neural tube
Answer:
neurulation, regionalization into three vesicles, formation of five vesicles
Question 3: centralization
Answer:
condensation of neural elements
Question 4: axon hillock
Answer:
where the cell body transitions to the axon, and where action potentials are initiated
Question 5: fast axonal transport
Answer:
100-400mm/day; transports vesicles and mitochondria in both directions
Question 6: Noggin and Chordin
Answer:
BMP inhibitors
Question 7: connective tissue coverings surrounding the brain
Answer:
meniges
Question 8: sagittal plane
Answer:
divides body into left and right
Question 9: Photoreceptors
Answer:
Sensory receptors that respond to light
Question 10: Xenopus laevis
Answer:
African clawed frog
Question 11: motor neurons
Answer:
ventral horns of spinal cord; innervate muscles
Question 12: inhibitory GABAergic interneurons
Answer:
spiny non-pyramidal cells, aspiny non-pyramidal cells
Question 13: Golgi staining method
Answer:
potassium dichromate and silver nitrate; taken up randomly by neurons turning them black
Question 14: neural tube
Answer:
a groove formed in the top layer of differentiated cells in the embryo that eventually becomes the brain and spinal cord
Question 15: diencephalon
Answer:
thalamus and hypothalamus
Question 16: ganglion cells
Answer:
projection neurons
Question 17: cardinal organizational trends in nervous system evolution
Answer:
bilateral symmetry, centralization, cephalization
Question 18: cell body
Answer:
contains the nucleus and the major cytoplasmic organelles
Question 19: myelin
Answer:
a mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers
Question 20: contiguity
Answer:
neurons communicate by contact at synapses rather than being physically continuous
Question 21: electrical synapse
Answer:
a synapse in which electrical current flows directly from one cell to another via a gap junction
Question 22: slow axonal transport
Answer:
- mm/day; transports cytoskeletal elements and soluble items in one direction
Question 23: neural inducers
Answer:
noggin, chordin, follistatin
Question 24: 3 vesicle stages
Answer:
prosencephalon, mesencephalon, rhombencephalon
Question 25: GFAP (glial fibrillary acidic protein)
Answer:
intermediate filaments of astrocytes
Question 26: input recieved on spines
Answer:
excitatory input
Question 27: activated microglia
Answer:
enlarge with inflammation or myelin sheath breakdown and become mobile phagocytes
Question 28: Golgi staining
Answer:
A cell stain that fills a small proportion of neurons with a dense dark product (lets us see axons/dendrites of neuron)
Question 29: neurons
Answer:
specialized and highly polarized cells that carry electrical impulses
.png)