practice Exam 2 Flashcards
The cells in the neural crest will divide to become
the peripheral nervous system
A neuroblast becomes a neuron during
differentiation
What is the signal that a growing axon sends to the cell body that a functioning synapse has been made?
Neurotrophic factor
Which of the following regions of the brain does NOT have neuronal proliferation after birth in humans?
cerebral cortex
The white matter consists of
myelinated axons
and
unmyelinated axons
AMPA receptors
will generate an excitatory potential if glutamate binds to them
- Raising young rats in an enriched condition results in
more synapses and dendrites
Which of the following loses volume during adolescence in humans?
cerebral cortex
When one eye is not well controlled by eye muscles in humans (amblyopia) by 2 years of age,
the eye will lose acuity
The majority of dendritic growth in the human cerebral cortex occurs
In the first 2 years after birth
When there is an increase in the number of AMPA receptors in a glutamate synapse, the synapse becomes
_______ because it ________
stronger; increases depolarizing potentials
An axon is cut and it eventually grows back. What do you know about the axon?
it was located in the peripheral nervous system
it did not undergo retrograde degeneration
Denervation supersensitivity occurs
when a neuron loses a neurotransmitter
What stops retrograde degeneration?
if the neuron still has an axon branch with synapses
Collateral axon sprouting can occur
in the central nervous system
Nerve nets without a brain can be found in
sea anemones
T or F: b. Humans share a more recent ancestor with chimpanzees than with old-world monkeys.
True
Epigenetics changes do NOT
change the genetic code (DNA)
If you are a male, your X chromosome
came from your mother
Your biological parents have an average IQ of 110. You read that IQ has a heritability quotient of 0.5 in our society. What can you deduce about your own IQ came from your mother?
You cannot make any deductions about your own IQ.
Everyone in the classroom has 2 eyes and all of the parents have 2 eyes. What is the heritability coefficient
for the number of eyes?
0/0 (no heritability quotient)
In females, the secretion of LH is a signal for
ovulation
LH is secreted by the
pituitary
What is needed in order for the testes to generate sperm?
testosterone
LH
FSH
