Which one of the following is correct for positive feedback occurring in physiological system? Select one: O a. In some cases previous negative feedback is still present, but must be sufficiently higher than the rate of positive feedback system that it caused irreversible state change. O b. Molecular reaction can have such a large drop in free energy that the reaction is essentially irreversible. O c. Positive feedback can move the control parameter to a value outside that normally maintained by negative feedback O d. a & b O e. a & c O fb& c Og. a, b & c

Which one of the following is correct for positive feedback occurring in physiological system? Select one: O a. In some cases previous negative feedback is still present, but must be sufficiently higher than the rate of positive feedback system that it caused irreversible state change. O b. Molecular reaction can have such a large drop in free energy that the reaction is essentially irreversible. O c. Positive feedback can move the control parameter to a value outside that normally maintained by negative feedback O d. a & b O e. a & c O fb& c Og. a, b & c

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal? Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA NCX SERCA
The Na+/K+ pump works against the electrochemical gradient. This gradient moves ________ out of the cell , against both gradients. This pump takes energy in the form of ____________which is broken down by an enzyme into _____________ and ______________ Na+ ; ATP; ADP ; Pi Na+; ADP; ATP; Pi K+; ATP; Pi; ADP K+; ATP; ADP; Pi
The Na+/K+/ATPase is the protein that creates an electrochemical gradient in your cells. It accomplishes this by: (select all that apply) A. Pumping Na+ from inside to outside the cell B. Pumping Na+ from outside to inside the cell C. Pumping K+ from inside to outside the cell D. Pumping K+ from outside to inside the cell
Hello, May I get help with this physiology question? Question: Zoe S has been feeling really tired lately and so she went to the medical doctor to see what's wrong. The medical doctors run some tests and tell her that she's developed a disorder where many of her enterocytes have started using glucose as the main substrate for glycolysis. She knows a little bit of cell biology, and she doesn't understand how this could possibly be a bad thing. Zoe asks you for some guidance. You tell her… (see image)
Th is is not a graded question
Define the following terms:a. ligandb. motor proteinc. GTPd. macromolecular crowdinge. excluded volume
Define classical pathway
Some exergonic chemical reactions that proceed slowly in the outside world proceed quickly in the human body. This is primarily because Select one: a. Body temperature is higher than outside temperature. b. Humans have enzymes that lower the activation energy of a chemical reaction. c. Humans have enzymes that increase the amount of energy released by a chemical reaction. d. All of the above
You are a drop of water that your instructor has taken. For this assignment you will write the pathway you would follow will the limitations are written below. START with the name of the structure where you would first be absorbed. END with the name of the structure where you would leave your instructor's body. Name EVERY structure through which you must pass between the start and endpoints. If you get stuck, write something to indicate (such as ....) then continue on the latter part of the pathway.
Body Activity What happens if there's a sufficient supply of ATP What happens if there's an insufficient supply of ATP Intracellular signing DNA and RNA synthesis Purinergic signaling Synaptic signaling Active transport Muscle contraction
part 1 A young athlete has trained over several months to participate in a duathlon sprint. They are doing this with their good friend, and it’s just for fun. They anticipate (based on their training times) that the total race will take them ~90 minutes to complete. The race will take place on a cool autumn day, and the individual expects to be performing at a steady state of ~50% of their maximal aerobic capacity. What would be happening to the plasma concentrations of the following hormones within the first 30 minutes or so of the race (ie, moving from rest to a steady state): Epinephrine/Norepinephrine Insulin As time passes (ie, duration), what changes will be occurring to energy substrate oxidation (ie, what’s being burned for energy CHO, Protein, or Fat)? What would you expect to be happening to blood lactate concentrations during the race? (ie, between minute 30 and minute 60) What if instead of a cool autumn day competing just for fun, this athlete raced in the middle of…
Consider a hypothetical cell where the import of glucose is powered through the coupled export of sodium ions. Which of the following are true? This is known as symport. This process does not require energy. Glucose is moving down its electrochemical gradient. Sodium is moving down its electrochemical gradient.