<p>Cilia and flagella both contain microtubules. Same internal structure, different length.</p>
<p>Hm, Cilia contain basal bodies. Yes to the flagella.</p>
<p>Question is open to anyone...</p>
<p>what neurotransmitter is the main inhibitory molecule in the brain? (I got you guys on this one!!)</p>
<p>Nope--a neurotransmitter is either acetylcholine, nor ephinephron (adrenaline), or GABA's. They are NOT always inhibitory. My question--Adrenaline, since when is it inhibitory? In terms of the post synpatic neuron, it can be excited or inhibited. Haven't you heard of the potassium and sodium channels? If sodium channel is open, the membrane is depolarized and results in EPSP (excitatory post synaptic potential.) Vice Versa with pottassium, in turn, triggering hyperpolarization and IPSP (I stands for inhibitory).</p>
<p>Q: Watson and Crick concluded________</p>
<p>uh..that DNA has a double-helix structure? and they also they gave the shaft to that Franklin lady.</p>
<p>what are the different types of nitrogeneous wastes in animals, and their pros and cons?</p>
<p>Yeah, semiconservative. I like the way you put it "gave the shaft." Warms my heart...seriously.</p>
<p>Remember: after you answer a question, put out a question.</p>
<p>What is Epistasis?</p>
<p>When more than one gene affects a phenotype.</p>
<p>Hardy-Weinberg?</p>
<p>When one gene is activated, it shuts off another gene.</p>
<p>Question's open to anyone...</p>
<p>Describe an inflammatory response? (easy question).</p>
<p>--</p>
<p>Um, I know people are taking AP bio.</p>
<p>Reddening of the affected area, swelling of the affected area, and a rise in body temperature are all characteristics of an inflammatory response.</p>
<p>What's the chemical responsible for causing that inflammatory response, and what are the two types of leukocytes (white blood cells) from which it is released?</p>
<p>Epistasis is the transfer - don't know if that's the best word - of cancer cells from one part of the body to the rest of the body.</p>
<p>Hardy-Weinberg describes a population that is not evolving, thus serving as a basis of comparison (to a population that is evolving). It has five characeristics, as follows:</p>
<p>i. No mutations
ii. Not gene flow
iii. Large population size
iv. No natural selection
v. Random mating</p>
<p>How does muscle contraction work?</p>
<p>Epistasis is when one gene affects the expression of another gene. I can't think of an example -- I always get this confused with Pleiotropy.</p>
<p>I think you may be thinking of something else, fabrizio...</p>
<p>chemical responsible in inflammatory respone: histamine.</p>
<p>Muscle Contractions are stimulated by your nervous system (sensory->motor.) When the action potential reaches the muscle it signals the realease of Ca (plus 2) ion, which in turn travels through the muscle, or the section--sacromere. The Ca (plus 2) ion then stimulates the binding sights of actin to be revealed (binding to the troponin molecule and moving it). ATP then is used, changing to ADP and Piruvate, in order to stimulate the release of the myosin head. The myosin head attaches to the actin and shifts it in a particular direction. Every time the head moves, ATP is used. When Oxidative Phosphorylation/aerobic Respiration doesn't produce anymore ATP. The Muscle stiffen, hence the term "rigor mortis." </p>
<p>--</p>
<p>Q:THe purpose of the Contractile vacuoule is______</p>
<p>"THe purpose of the Contractile vacuoule is______"</p>
<p>To release water (and any unwanted substances stored) from the cell. (Also, this type of "excretory system" is common in Protists.)</p>
<p>What are the five prezygotic barriers which prevent gene flow?</p>
<p>1.Temporal Isolation-reproduction at different times of the year (season)</p>
<p>2.Habitat Isolation-specie's habitats are in different areas (don't interact).</p>
<p>3.Behavioral Isolation-mating rituals.</p>
<p>4.Mechanical Isolation-reproductive organs differ amongst different species.</p>
<p>5.Gamete Isolation-the egg and sperm aren't compatible with other species--aren't interchangeable.</p>
<hr>
<p>Describe the process of Transduction. Determine the difference between Lysogenic and Lytic cycles of virus'...</p>
<p>I think you meant metastasis, fabrizio.</p>
<p>And what are the postzygotic barriers?</p>