Understanding isotonic contraction of muscles.
Could some one explain for me how the muscle shortens and keeps a constant tension (case of isotonic contraction). I'm very confused, I mean since the muscle gets short then there must be more tension...
View ArticleMCAT Study Schedule
Hi all, I am in the process of constructing my schedule, and am planning to use some sort of online tool to do so. I know there is one "sponsored" by SDN, but that doesn't have all the resources I plan...
View ArticleKinetics
View attachment 225470 Is this the attached question correct? I was under the impression temp is directly proportional to reaction rate? In the Arrhenius equation it seems gas and temp are directly...
View ArticleExcitability of the nerve and potassium ion concentration.
My book says that the excitability of the nerve is increased when increasing the the potassium ion (K+) concentration in the extracellular fluid and vice versa. I don't understand this mechanism could...
View ArticleBottom of the biofilm
Hello everyone, I was wondering, what is the bacterial growth phase in the bottom of a biofilm? I know bottom bacteria are dormant... Does it mean they are in the stationary phase? Thanks
View ArticleChemical Kinetics / Rate Law Question - Kaplan Mess-up??
I am reading Kaplan's General Chemistry MCAT Review 2018-2019, and think that one of its chemical kinetic questions is wrong. (Or perhaps I am simply missing something). I have attached an image of the...
View ArticleMCAT Physics: How to study?
Hi everyone! I took algebra-based physics about a year ago but I learned nothing from the course because of the instructor. Now that I need to learn physics all over again, I am wondering what...
View ArticleWhat resources to use for CARS?
Hi everyone! I know that practice is the key for CARS section on MCAT. From what I've gathered by reading on SDN is that AAMC CARS Volume 1 and Volume 2 is great to practice passages for CARS. But, I...
View ArticleKaplane Passage Based Questions
For anyone who has taken Kaplan Online Self Paced Study, Are their Passage Based Problems for the end of the chapter good to do along with AAMC questions? Is just focusing on AAMC for 2 months a good...
View ArticleNucleophilicity question
in the EK book pg 80 in chem I have a question that I don't understand. it asks which molecule is a better nucleophile. ethanol or ethanethiol and says ethanol is a better one b/c is more...
View Articletoxin preventing voltage gated sodium channels from closing?
I keep seeing this question - If a toxin prevents voltage-gated sodium channels from closing, what will occur? Some answers I am finding online state that the cell will be conducting APs continuously,...
View ArticleQuestion about bond energy and strength.
If shorter bonds (sp2-sp2) require more energy to break, then why are they lower in energy than (sp3-sp3 bonds)? I know that the shorter the bond, the more stable it is and thus the lower energy it is...
View ArticleStudying for MCAT
Hey guys/gals, I was seeing if you guys could give me some advice on what to study for the mcat. My current planwas to use EK; however, I feel like my background isn' strong enough in some areas. For...
View ArticleError on Nextstep Test 1, Q23
On Nextstep 1, Q23 it states that you should only expect one inflection point. Isn't this wrong? Shouldn't you expect two inflection points? The thiol group is weakly acid (not VERY weakly acidic) and...
View ArticleNo MCAT Score Improvement
Hi guys, I have been studying for the MCAT for months, the first day of September I kicked it up to 6-8 hours a day of content review (going through the Princeton self paced books/classes/coursework.)...
View ArticleOrganic Chemistry: sn1 sn2 e1 e2 problems
There are two reaction mechanism problems that I am having difficulty understanding: Problem 1: Tertiary halide with azide (N3-) acting as nucleophile/base (solvent is water) My answer: e1 Key answer:...
View ArticleCan someone help me with this EK physics problem
**the passage states the leg when fully raised is 30 degrees below horizontal. I cant figure out how to draw the free body diagram to calculate the height in which the ankle is raised
View ArticleNextStep Test 1, Q 34 Wrong Answer Explanation?
Hey Nextstep, Do you guys have a wrong answer explanation on Q34 of FL1? On D, you guys state in the answer explanation that double crossover events only affect one arm of each chromosome. I think this...
View ArticleNextStep FL1, Cognitive Theory and Arousal?
In this question, how is cognitive theory related to arousal? I understand how drive reduction theory is related to arousal, but I've never seen a link between cognitive theory and arousal. Nextstep,...
View ArticleWhy is the anomeric carbon OH always the nucleophile in disaccharaide...
When you make a disaccharaide, its the anomeric carbon OH that is the nucleophile and the other sugar's OH that is the leaving group (so like with a 1'4 sugar. its the carbon 4's OH, that leaves and...
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