（１） Field: Biology/Life Science Session Topic: Introductory Speaker:
... fundamental physiological function observed in almost all organisms from a one-cell
organism to human and is generated by an endogenous biological clock. It consists
of three components: input, oscillator, and output. The endogenous period length is
not exactly 24 h and must be entrained by light th ...
Concept Map - Western Washington University
... • Angiosperm species account for more than three-quarters of all plant life on Earth.
What characteristics/adaptations enable this plant type to be successful (structurally,
at the cell and tissue level, reproductive advantages, etc.)?
• Describe the "relationship" that forms between rhizobium bacte ...
... (EEG recordings were made separately for the two sides of a dolphin‘s brain. Low
frequency activity was recorded in one hemisphere while higher frequency activity
typical of being awake was recorded in the other hemisphere.)
Cycles of sleep and wakefulness are examples of circadian rhythms, a daily ...
... The following circuit consists of a source portion, which adds the outputs of two registers R1 & R2
and a destination portion, which stores the sum in R3. The connections between the source and
the destination are made by an automatic router, which creates wires with an average length of
1mm and con ...
... surface. If the spring is compressed by 0.04 and then
released determine: a) the maximum speed of the object
b) the speed of the object when the spring is compressed
by 0.015 m c) when it is stretched by 0.015 m d) for what
value of x does the speed equal one half of the maximum
a) v= √[(A2-x ...
Histone modifications in Huntington`s Disease
... *Acetylation of histones at specific residues increases
gene transcription; conversely, histone deacetylation
Recent studies in numerous HD models have
demonstrated a potential therapeutic role for histone
deacetylase (HDAC) inhibitors in the treatment of
Chromatin Remodeling - Molecular Pharmacology
... address fundamental questions about this process. For example, it is now possible to conduct gene expression profiling
in the specific cell types where altered MeCP2 and H3 acetylation are observed by combining immunohistochemistry
with laser microdissection, RNA amplification, and microarray analys ...
Epigenetic Regulation of Neural Gene Expression and Neuronal
... mitotic neurons might serve to maintain DNA methylation
after base-excision repair of the G:T mismatch that can occur
upon deamination of the methylated cytosine. Alternatively,
Dnmt1 may still be required for maintaining DNA methylation if methylation turnover occurs in adult postmitotic neurons. C ...
Rhythms of Waking and Sleep 2 Day Circadian Examples
... • In the absence of environmental cues, our circadian rhythms are
“free-running” on a slightly more than 24 hr cycle (e.g. 24.5 hrs)
• Normally environmental cues “re-set” the clock & keep it to a 24 hr
schedule. These cues are called “zeitgebers”
• Light is the primary one.
• Exercise, noise, meals ...
Defense - Auburn University
... Jitter represents the time varying behavior of the clock signal. Noise from
various sources cause perturbations on the clock network that can cause any
receiver of the clock signal to perceive a transition at a different time. Since
the noise events are typically random in nature, their effect on sy ...
The effects of electroconvulsive seizure on the transcription
... functions such as excitability of neurons, neurogenesis, and cell survival in
The PAR family of bZIP genes
• Defined by the presence of a proline and acidic amino acid–rich protein
(PAR) domain is consist of three polypeptides, D-box binding protein (Dbp),
thyrotroph embryonic factor (Te ...
Characterization of the apoptotic functions of the HID homolog
... distinct functions in the apoptotic pathway due to their distinct expression patterns, both
temporally and spatially (Lee et al., 2013).
This project aims at investigating whether apoptotic mechanisms, specifically the apoptotic
functions of hid, have been conserved evolutionarily over time by utili ...
Phytochrome C Is A Key Factor Controlling Long
... all day and seemed to show diurnal ﬂuctuation under
both long (16-h) and short (8-h) photoperiod conditions with the trend that it was up-regulated around
dusk and down-regulated during the day. This result
led to the hypothesis that the SNP (T1139C) in the GAF
domain might affect its protein functi ...
Evolution without evolution: Dynamics described by stationary
... We shall argue that the temporal behavior we observe is actually a dependence on some internal clock time, not on an external coordinate time. It is
perfectly consistent with our observations to assume that any closed system
is in an eigenstate of energy and thus stationary with respect to coordinat ...
6.EE.2: Worksheet Solutions
... where s is the length of the cube’s side. What are
the volume and surface area of a cube with a side
length of 2 inches?
Its volume is 8 inches cubed and its surface area is
24 inches squared.
10. The force of gravity on an object in Newtons depends on the object’s mass in kilograms, m, and is
Datasheet - Mouser Electronics
... Microsemi makes no warranty, representation, or guarantee regarding the information contained herein or the suitability of its products and services for any particular purpose, nor does
Microsemi assume any liability whatsoever arising out of the application or use of any product or circuit. The pro ...
... Regulated and unregulated
Neuropeptidergic Organization of the Suprachiasmatic Nucleus in
... cells in the SCN of Spalax, compared to over 3000 in the rat
. In addition, VP fibers are typically abundant in the dorsomedial and ventrolateral regions of the SCN in other mammals [77,81]. VP neurons are considered to represent the main
efferent system of the SCN [10,18] and, for example, send ...
Molecular and anatomical signatures of sleep deprivation in the
... from the microarray data and other sources confirmed that robust molecular changes were
largely restricted to the forebrain. Analysis of the ISH data for 222 genes (publicly accessible
at http://sleep.alleninstitute.org) provided a molecular and anatomic signature of the effects of
SD on the brain. ...
... a) No. The most likely explanation is that the SCN does not
control the circadian rhythm in hamsters.
b) Yes. The data from 80% of the hamsters are very
consistent. In the other 20%, the transplanted SCN may
not have established functional connections with the
c) No. A failure rat ...
Serotonergic Integration of Circadian Clock and Ultradian Sleep
... In mammals, the suprachiasmatic nucleus (SCN) of the hypothalamus generates a 24 h rhythm of sleep and arousal. While neuronal
spiking activity in the SCN provides a functional circadian oscillator that propagates throughout the brain, the ultradian sleep–wake state
is regulated by the basal forebra ...
The circadian clock, or circadian oscillator, in most living things makes it possible for organisms to coordinate their biology and behavior with daily environmental changes in the day-night cycle. The term circadian derives from the Latin circa (about) diem (a day), since when taken away from external cues (such as the day-night cycle), they do not run to exactly 24 hours. Clocks in humans in a lab in constant low light, for example, will average about 24.2 hours per day, rather than 24 hours exactly. Hence the term circadian.The normal body clock oscillates with a period of exactly 24 hours when it receives daily corrective signals from the environment, primarily daylight and darkness. Circadian clocks are the central mechanisms that drive circadian rhythms. They consist of three major components: A central biochemical oscillator with a period of about 24 hours that keeps time A series of input pathways to this central oscillator to allow entrainment of the clock A series of output pathways tied to distinct phases of the oscillator that regulate overt rhythms in biochemistry, physiology, and behavior throughout an organism.The clock is reset as an organism senses environmental time cues of which the primary one is light. Circadian oscillators are ubiquitous in tissues of the body where they are synchronized by both endogenous and external signals to regulate transcriptional activity throughout the day in a tissue-specific manner. The circadian clock is intertwined with most cellular metabolic processes and it is affected by organism aging. The basic molecular mechanisms of the biological clock have been defined in vertebrate species, Drosophila melanogaster, plants, fungi, bacteria, and presumably also in Archaea.