Cellular Physiology lab report 1

Course Code: BIO121 Course Name: Principles of Biology I Read the question carefully first Answer the question-4 chemical reaction according to the question 4(a) and 4(b) with step by step clear explanation. Question 4 (a) In cellular respiration, glucose is broken down and the energy released is used to make ATP molecules. ATP molecules can be produced via this reaction: ADP+ P; → ATP. Is the production of ATP endergonic or exergonic? (b) What is the function of ATP molecules in cells?

What happens to membrane potential during manipulation 4 in the attached figure (Figure 4.13 of the textbook)? 1 Efflux of Nat Nat efflux (logarithmic scale) 0 3 Recovery when K+ is restored 2 Nat efflux reduced by removal of external K 50 100 4 Efflux decreased by metabolic inhibitors, such as dinitrophenol, which block ATP synthesis 150 Time (min) 200 5 Recovery when ATP is restored " I 250 TATI 122 O Membrane potential does not change, because the Na+-K+ ATPase does not contribute to membrane potential. O Membrane potential is hyperpolarized, because the Na+-K+ ATPase is electrogenic and hyperpolarizes membrane potential when it is active. O Membrane potential is depolarized, because the Na+-K+ ATPase is electrogenic and hyperpolarizes membrane potential when it is active. 300

The planned fast depolarizing phase coincides with: * =+ 20 mV1 2 2. 90 mV OEntry of potassium ions into the cell The exit of positive sodium ions out of the cell Entry of positive sodium ions into the cell The exit of potassium ions out of the cell The exit of potassium ions and the entry of positive calcium ions into the cell 5

Physiology - question 1 a-c

← http: S Scho S Grac SEX S Show S Thin D BCPS Links U2L S U2L http SU2L S Job S MD S Try bcps.schoology.com/common-assessment-delivery/start/6343073236?action=onresume&submissionid=968149682 Show What You Know: Cellular Respiration (minor summative) Which of the following formulas is the balanced chemical equation for cellular respiration? O 6CO2 + 6H2O -> C6H12O6 + 602 C6H1206+6 02-> H2O + CO2 + 6 ATP O 02 C6H1206-> CO2 + H2O + ATP O C6H1206+6 02-> 6 H2O + 6 CO2+36ATP S Try O Goo W Job G WH 4 1 2 3 Sign out

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Parisa Izadi hysics I LAST 2 Assignment 27.04.2021 / Coursework 2 tion 2 Which one of the following is correct for positive feedback occurring in physiological system? vet ered Select one: ted out of 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. ag question 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 f b& c O g.a b & c Nevt nane revious naae EN 01:51 5

Activity 10 Pathway of a Glucose Molecule as it Travels Through the Human Body STEP COLOUR ORDER 1-26 (1 is entry into the body and 26 is used in the Cell) Pink for the respiratory system Blue for the circulatory system Green for the digestive system Pink Green Pink Blue Blue Blue Pink Pink Blue Blue Green Green Pink Pink Enters Lungs Enters stomach CO2 and H2O are exhaled during respiration Enters left atrium Inters aorta Enters left ventricle Used by the cell in the process of cellular respiration to produce ATP CO2 and H2O enter into the alveoli of the lungs returns to the heart via the inferior vena cava absorbed by a villus lining the small intestine transported to the liver passes through pharynx returns to heart via pulmonary vein the waste products of cellular respiration leave the mitochondria and enter the ✓ where active transport occur. ★ where passive transport occurs ★ ★ ✓ ★I ✓ ★ ✓ ✓ ✓

Subject: Neurophysiology  The neuron for this experiment is in a bath with [K+] = 2 mM and [Na+] = 150 mM.  Calculate the Nernst Equilibrium potential for each ion.       What is your estimate for the gNa and for gK?  If you are more comfortable, use PNa and PK.  Remember, these values should be between 0 and 1.        What is the resting membrane potential for this cell?        Draw an action potential for this neuron in this solution.  Keep in mind that this neuron is in unusual solutions.  Label each axis and indicate inward and outward currents.  Be absolutely certain to label the peak voltage and threshold for the AP!

Define relaxation phase

12:42 1 l 5G Today Edit 12:40 AM If a baseball is coming at your face, you blink FAST in a reflex manner. A reflex is composed of all of the following EXCEPT A neuron that travels within the spine up to the cortex of the brain An afferent neuron incoming to the spinal cord OA motor or efferent neuron exiting from the spinal cord O An effector, which carries out the response

To which in is the membrane most permeable? You should have learned several basic principles of electrophysiology. Describe the key principle that your answer is based on [Na+]=10mM [K+]=100mM [Na+]=100mM [K+]=10mM Vm= -60mV

Activity 10 Pathway of a Glucose Molecule as it Travels Through the Human Body STEP COLOUR ORDER 1-25 (1 is entry into the body and 25 is used in the Cell) Pink for the respiratory system Blue for the circulatory system Green for the digestive system Enters Lungs Enters stomach CO2 and H2O are exhaled during respiration Enters left atrium Enters aorta Enters left ventricle Used by the cell in the process of cellular respiration to produce ATP CO2 and H2O enter into the alveoli of the lungs returns to the heart via the inferior vena cava absorbed by a villus lining the small intestine transported to the liver passes through pharynx returns to heart via pulmonary vein the waste products of cellular respiration leave the mitochondria and enter the cytoplasm of the cell ✓ where active transport occur. passive transport occurs where

Ans no. 29

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Please help in answering this question - more than one answer may be correct: Cardiac muscle conducts myogenic signal in a manner similar to A) parasympathetic neurons B) single-unit smooth muscle C) motor neurons D) skeletal muscle E) multi-unit smooth muscle

100% Normal text Arial 11 + ... I| I11 I 2 l 3 4 5 6 Select all the correct answers for the question that follows. The resting membrane potential of an excitable cell demonstrates a negative inner face because: the net flow of sodium ions is out of the cell through leakage channels sodium and potassium ion diffuse across the cell membrane according to their electrochemical gradients the net flow of potassium ions is out of the cell through leakage channels large negatively charged protein anions get trapped in the excitable cell O tv Aa ok Pro

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Activation of which pathway leads to a disinhibition of the thalamus and increased cortical activation? Basal nuclei D Cortex I GABA - Glutamate - Dopamine Striatum C B GPe A GPi/SNr SNC STN GPI/SNr Thalamus O Both B and C O B O A E LK C Fn Alt

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