42 Matching Annotations
  1. Apr 2020
    1. before achieving exhaustionwas not caused by greater glycogen deple-tion.

      no statistical diffference in glycogen between groups ruling out that as a mechanism

    2. Perhaps the sub-stances CMP and UMP activate the oxida-tive enzymes and, in need of energy, glu-cose is metabolized to ATP via the Krebscycle, rather than forming lactate, thus,the enzyme responsible for the produc-tion of lactate is down regulated, as shownin our study. L

      helps oxidative metabolism and defers fermentation.

    3. is telling us. You can list a few observations or describe it by writing your own figure caption.

      it is comparing biochemical markers such as glucose, glycogen and lactate before and after exercise in both groups. Whats interesting in the amount of glucose is roughly constant before and after exercise, but the treated group has almost double the amount. As for glycogen, the two groups seemed to decrease roughly in the same manner although the treated group had a little bit more both before and after. as for lactate. What is interesting is the treatment group saw a reduction in lactate after exercise while the control group gained lactate.

    4. s or describe it by writingyour own figure caption.

      the amount of time it took until the treatment group and control group of rats reached exhaustion. From day 5 and on, the treatment group clearly outperforms the control. Where as the treatment group improved their time every single day, the control group peaked on the 6th day, began decreasing/ plateauing, and then broke their day 6 record by a hair on the 10th day.

    5. Exhaustion was defined

      1 issue with this is complete true physical exhaustion when muslces truly have no more to give. or when the rat mentally gives up

    6. With the aim of determining the bene-ficial effect of administering CMP andUMP to e

      what will happen to exercise performance when organisms are treated with CMP and UMP

    7. Some of these fac-tors include the rapid depletion of glyco-gen and glucose stores

      fatigue possible caused by loss of allocated glycogen and glucose.

    8. Liver glycogen levels remains unaltered during exercise, suggesting thatCMP/UMP may be implicated in maintaining the level of hepatic glycogen constantduring exercise. Lactate dehydrogenase and aspartate aminotransferase activity is sig-nificantly lower in the liver of treated rats

      explanation for results

    9. xercise endurance, levels of lactate, glucose and glycogen,and the activity of several metabolic enzymes such as, creatine kinase (CK), lactatedehydrogenase (LDH), and aspartate aminotransferase (AST

      ways of measuring their hypothesis

    10. Cytidine monophosphate (CMP), Uridine monophosphate

      nucleotides administered to patients as a drug in order to provide pain relief, fixing cognitive function and may have an effect on exercise

    1. nce in activities from lo

      i dont entirely understand the complexity of muscle transmission, but it would be interesting if small amounts of this could be used to jolt muscles awake in someone who is unresponsive or dysfunctional? Also, there is always the idea that microdosing could be used to make one immune to the venom.

    2. Blockade of potassium channels atmotor nerve terminals would be expected to delaynerve terminal depolarisation, allowing calciumchannels to open for longer durations, leading tofacilitation of evoked release of acetylcholin

      potential mechanism is that it blocks the potassium ion channels which allows for calcium channels to be open for longer causing more AcH to be released.

    3. n the isolated nerve–muscle preparations, thevenom ofO. doriaecaused a rapid initial increase intwitch height and an increase in baseline tensionthat was eventually followed by block of musclecontractility.

      works by overloading the twitch, then proceeding to block function

    4. Effects ofOdontobuthus doriaevenom

      similar to the previous chart, a higher dose of venom (3 ug/ml) resulted in a greater twitch peak than the group below it (1 ug/ml) going against the trend. This time, its with the hemidiaphragram on indirect stimulation. A different muscle, but same form of stimulation resulting in the same trend which further confirms this find.

    5. mg/ml) on indire

      figures a, b, and d all show consistently reduced twitch and overall response with higher amounts of venom. What is interesting is in chart a, the peak twitch height for 1 ug/ml of venom exceeded that of 0.3 ug/ml which goes against the trend.

    6. The main facilitatory effects ofO. doriaevenom are likely to be due to toxins that affect Na+channels innerve–muscle preparations similar to most Old World scorpion venoms, but blocking effects on K+channels are alsopossible

      hypothesis: the effects are caused by modifications to the K or Na ion channels

    7. reduced responses

      opposite of what i proposed, shutting down all muscles could be equally as bad, especially considering msucles in lungs, heart, and other vital organs

    8. preparations, used for all intracellular recording techniques, the venomenhanced the release of acetylcholine and induced repetitive firing of nerve action potential

      i recall reading about neurotoxins that work by inhibting acetycholinesterase thus causing non stop firing of acetycholine and thus uncontrollable muscle movements resulting in convulsions and death

    1. The observation that the influence of cooling was greater on the completely curarized and directly stimulated, than on the indirectly stimulated muscle indicates that the site of the potentiating effect of cooling is the muscle fiber itself.

      colder temperatures affect the original site of stimulation more than the ones are stimulated by "domino effect"

    2. Similarly to our observations, marked decrease of ACh release by cooling was also demonstrated at the neuromuscular junction in neurophysiological experiment

      confirming previous studies that reduce neurotransmitters are released in lower temps

    3. lowering of temperature increased Pt, twitch duration and the time required for the development of maximal twitch tension with both direct and in- direct stimulation.

      lowering the temperature caused the twitch to last longer and take more time to reach its max.

    4. e it b

      stimulation rate is a measure of how frequently an action potential occurs. and the other axis is a measurement of force? The first graph is a measurement of tetanic activity and the second one is reffered to as a volley. There seems to be an inverse effect of stimulation rate on the two. raising the stimulation rate seems to increase the y for the top graph and reduce in the 2nd graph. Also these values are higher for higher temperatures

    5. n your own words, what is the biologicalquestion that the researchers are asking?

      how does colder temperatures affect muscle activity. Or more specifically, how does it affect isometric and tetanic movements as well as how neuromuscular transmission is affected.

    6. z decreased by more than 60 % as temperature was lowered from 37 ~ to 17 ~

      this part was more expected as diffusion of ions and enzymes would be slower in a colder environment directly leading to less action potentials

    7. sometric Pt to 195.8 + 9.6

      Interesting that it resulted in an increase. In my experience, most biological processes weaken or slow down with falling temperatures so i had expected it to follow suit

  2. Feb 2020
    1. DV

      i would imagine that milk viscosity may be determined by things such as polarity of content of amino acids. this could be indicative of how the enzymes have affected the milk. In my experience, skim milk is usually less creamy than whole milk

    2. MTGase can be used to modify proteins to improve their nutritional and functional properties (Huang et al. 1995; Motoki and Seguro, 1998). For this reason, MTGase technology is going to be an essential tool for protein modification in both food and non-fo

      The hypothesis seems to be that we can utilize this enzyme outside of natural biological processes to alter the specific contents of dairy in making different varieties of milk. but its difficult to say what its trying to prove here