A closed circulatory system usually consists of all of the following: pumping organ, veins, blood, arteries Many homeostatic mechanisms are regulated by biofeedback systems. When there is a change in the set point, the net effect of a negative feedback system is to set off mechanisms that will return the change to steadystate levels. B cells undergo clonal selection once activated. Cellmediated immunity is directed by T cells, which react with antigenMHC complexes. The flight muscles of insects contain more mitochondria than any known variety of muscle. Oxytocin stimulates uterine contractions Millions of sperm are released even though only one is needed for fertilization because Many sperm die as a result of the unfavorable pH in the vagina, Many sperm die by phagocytosis in the female tract, Many sperm are needed to penetrate the corona radiate, Many sperm lose their way because their movement is undirected. The first system to develop in the vertebrate embryo is the nervous system. The sympathetic nervous system is activated when there is a startling situation events of a second messenger system: neurotransmitter binds to its receptor, G protein is activated, cyclic AMP is produced, protein kinase is activated, phosphorylation takes place, protein closes potassium channel Ectothermic animals depend on heat from the external environment to adjust their body temperatures. In organogenesis, the ectoderm gives rise to sense organs. Homeostatic mechanisms are processes that maintain a…
Coping Mechanisms in The Things They Carried
The Things They Carried withstands one of the central themes of soldiers in the war carrying physical and unwanted emotional baggage. Consequently, it is questionable how the soldiers cope with the horrors of war. Throughout the novel it is shown that the soldiers use many mechanisms to manage this emotional baggage. This includes, but is not limited to, storytelling, humor and denial.
Thermodynamics is the investigation of vigor, the change of vigor to different structures and the capability of vigor to do work. The expression "Thermodynamics" begin from two root words "thermo" which means hotness and "element" which means power. The laws of thermodynamics are supreme and the recognizable universe complies with the Laws of Thermodynamics. The First Law of Thermodynamics is regularly reputed to be the Law of Conservation of Matter, states that matter…
CO2 + H2O = H2CO3 (Carbonic acid) ➡ H + HCO3 (bicarbonate)
interaction of organs and systems
Timing and coordination of physiological events
Responding to environmental cues
Disruption to homeostasis
Environment I flue des expressin of genotype
Gas Exchange with Plants (776-779)
Guard Cells are openings where gas can enter the plant leaf. Gases need to get to the upper epidermis to produce sugar.
Opening of the…
many years by such large numbers of investigators that there is no doubt of its validity … it may eventually be regarded as a law.
For example, the law of gravity, thermodynamics and gas laws. Biologists are very conservative about using the term law
- Hooke looks at cork coming up with the cell
- Cytology- bed rock of cell bio
- Cells actually do chemistry
- Mendel – monk who did the pea plant experiment
- Where all three strands come together is the modern time
- DIC = differential…
ou've probably heard people talk about "defense mechanisms," or ways that we protect ourselves from things that we don't want to think about or deal with. The term got its start in psychoanalytic therapy, but it has slowly worked its way into everyday language. Think of the last time you referred to someone as being "in denial" or accused someone of "rationalizing." Both of these examples refer to a type of defense mechanism.
In Sigmund Freud's topographical model of personality, the ego is the…
a checkered cloth would
be placed on a table, and markers moved around on it according to certain rules, as an aid to
calculating sums of money.
The ancient Greekdesigned
, dating between 150 to 100 BC, is the world's oldest analog
is believed to be the earliest mechanical analog "computer",
Derek J. de Solla Price
It was designed to calculate astronomical positions. It
was discovered in 1901 in the …
Kelsey Flaherty Dr. Hardin
Homeostatic Imbalances: Hypertension September 26, 2014
As a medical assistant it is vital that we are able to communicate effectively with patients of all backgrounds, including differences in education, culture, or language. To ensure the patient will be able to understand the diagnosis, it’s important to try to simplify medical terms as much as possible. I would start the conversation by defining hypertension, which is high blood…
Osmoregulation as a Homeostatic Mechanism using the Comparitive Melting-Point Method for two Crab Species.
Two crab species, Plagusia and Cyclograpsus, were collected from a local estuary in the littoral and deep water zone for osmoregulation studies. To examine differences in osmoregulatory mechanisms among the species, haemolymph of the specimens was extracted once they were acclimated to varying concentrations of seawater. Using the comparative melting-point, capillary tubes were…
established principle of thermodynamics (which eventually became the Second Law) was formulated by Sadi Carnot in 1824. By 1860, as found in the works of those such as Rudolf Clausius and William Thomson, there were two established "principles" of thermodynamics, the first principle and the second principle. As the years passed, these principles turned into "laws." By 1873, for example, thermodynamicist Josiah Willard Gibbs, in his “Graphical Methods in the Thermodynamics of Fluids”, clearly stated…
Homeostatic Imbalances of Thyroid Function
TSH levels in patients with primary hypothyroidism are
Thyroxine (T4) levels in patients with primary hypothyroidism are
TSH levels in patients with secondary hypothyroidism are
Thyroxine (T4) levels in patients with secondary hypothyroidism are
TSH levels in patients with hyperthyroidism are
Thyroxine (T4) levels in patients…