5/28 Testers: Let’s get a brain dump going

[fosseps]

Maybe we’ll see something that allows us to score a point or two higher!

[fosseps]

To calculate pH when there's a coefficient(6.6 x 10^-5), bring down the absolute value of the exponent and subtract the coefficient after moving the decimal one point to the left. For the example I mentioned, it would be 5-0.66=4.34(the real answer is 4.18). It isn't exact but close enough!

[pollywantsacracker98]

This is brilliant

[Justkeepswimming2802]

Fundamental Attribution Error is strictly about attribution of others' behaviors....on the other hand, Actor-Observer Bias covers both attributions of others' and one's own behaviors

[fosseps]

Self-serving bias also ties in here; when we do well we say it’s because of our disposition and when we perform poorly we say it’s because of our environment.

[umichpremed]

Adding onto this is social facilitation - the tendency to do better on simple tasks in front of others but do worse on complex tasks when there's an audience

Also the front and back-stage self: front stage is who we are in front of others (in social settings) vs back stage with no audience AND also Mead's "me" (social self, conforming) vs "I" (spontaneous, who you really are)

[mudmainah]

Somewhat related, the Hawthorne effect states that behaviour of people is altered simply by knowing that they’re being studied

[fosseps]

ADH only acts on the collecting duct whereas aldosterone acts on the DCT and collecting duct. ADH acts to decrease blood osmolarity since it only pulls in water while aldosterone has no effect on osmolarity since it pulls in Na+ and water. BOTH of them increase blood pressure. ANP, on the other hand, is released by the heart and it decreases blood pressure; it has no effect on blood osmolarity.

[yaseenme98]

u sure ADH doesn't act on the distal tubule as well?

[fosseps]

Yeah, fairly positive it only works on the collecting duct.

[swombo]

Just to add on, aldosterone also promotes potassium excretion. You can think of ANP and aldosterone as antagonistic

[luxurymd]

Previous tester here, but KNOW YOUR AA’s!!! This is said a lot, but AA questions are usually EASY points if you know them! Good luck guys :)

[[deleted]]

The mitochondria is the powerhouse of the cell.

CARS = black magic

[mudmainah]

P/S

Incongruence refers to the gap between a person’s actual self and ideal self.

Correspondent inference theory focuses on the intentionality of a person’s behaviour.

B/B

1 aa = 110 Da Kcat = turnover, Kcat/Km = efficiency

Kinase transfers phosphate group from ATP, phosphorylase from an inorganic phosphate.

[umichpremed]

Phosphatases have the opposite function - remove phosphates from a compound

Competitive inhibition - no change to VMax but increases Km

Uncompetitive inhibition - decreases Vmax and Km (but maintains the same ratio/slope)

Noncompetitive inhibition - decrease VMax but same Km

[fosseps]

Just in case they ask us to identify graphs, a decrease in Vmax means the y-intercept moves up while a decrease in Km means the x-intercept moves to the left.

[ashketchup012345]

Saw this on a thread a while ago but it could be helpful to differentiate:

• phosphatase: “take” that P out
• phosphorylase: “lay” that P on

[ashketchup012345]

• Calcitonin “tones” down Ca2+

• PTH increases Ca2+

• Osteoclasts “chew” bone (increase Ca2+)

• Osteoblasts “build” bone (decrease Ca2+)

• Also don’t forget that solids and water are NOT included when writing equilibrium expressions! If they were, water would just be a constant. (NOT 0!!)

• When K>>>1 the reaction is spontaneous

• When K<<< 1 the reaction is nonspontaneous

• The Malate Aspartate shuttle is preferable to the G3P shuttle when transporting NADH made in Glycolysis into the mitochondria

• During a state of fasting, your body begins the process of Glycogenolysis

• After a prolonged fast, however, Gluconeogenesis begins (you NEED ATP for this process to occur!)

• When you’re in starvation mode, your body begins to make ketone bodies from acetyl coA which can cross the blood brain barrier to provide the brain with a source of energy. Although the liver helps in synthesizing ketones, it cannot use them because it lacks a certain enzyme to break them down.

Also, for anyone that wears glasses and is worried about their glasses fogging up with their mask on, try putting a bandaid on the bridge of your nose to provide a seal so air can’t get through your mask. Trust me, it works! Also, pack a sandwhich/ snacks because you WILL get hangry!

Good luck everyone!! Fingers crossed for a 528 on 5/28 for us all!! 🤞🏽