Question

How is sodium replenished for the function of the sodium potassium pump if this pump pushes...

How is sodium replenished for the function of the sodium potassium pump if this pump pushes sodium to the interstitial fluid?
a. Sodium re-enters the cell through leak channels.
b. Sodium leaves the cell through leak channels.
c. Sodium re-enters the cell through passive transport
from the lumen.
d. Sodium leaves the cell through passive transport to the
lumen
Science   Anatomy-And-Physiology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer is option C i.e. Sodium re-enters the cell through passive channel from the lumen.

Explanation: Sodium potassium ATPase pump maintains the resting membrane potential of a cell by sending 3 Na​​​​+ ions out of the cells while moving 2 K+ ion into the cells.It is an active process as the process needs 1 ATP to be used.

Sodium re-enters the cell through Passive channels as the cell membrane is relatively not so much permeable to sodium ions. And as those channel does not need ATP to import sodium into the channels these are called passive channel.

Example: 1) In case of nerve cells it is voltage gated sodium channel which brings about action potential in the neurons.

2) It is Sodium Glucose symporter which allow sodium ion along with glucose molecule from the lumen of intestinal tract into the cells.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
What happens to sodium channels and potassium channels during repolarization of a neuron? A. both potassium...
What happens to sodium channels and potassium channels during repolarization of a neuron? A. both potassium channels and sodium channels remain closed B. the sodium channels close, followed by opening of the potassium channels C. both sodium channels and potassium channels remain closed D. the sodium channels open, but the potassium channels remain closed E. both potassium channels and sodium channels remain open The above repolarization of a neuron will result in which of the following ionic currents? A. a...
The sodium (Na+) potassium (K+) pump is a protein channel in the nephron. The pump moves...
The sodium (Na+) potassium (K+) pump is a protein channel in the nephron. The pump moves sodium out of the nephron and moves potassium into the nephron. The nephron is exchanging molecules with the Group of answer choices A. capillary B. adrenal gland C. collecting duct D. urethra
Q1. What is the function of the pertitublar capillaries? A. To secrete NA+(sodium) and H20 (water)...
Q1. What is the function of the pertitublar capillaries? A. To secrete NA+(sodium) and H20 (water) in exchange for k+(potassium) into the tubule B. To return deoxygenated blood to the heart and lungs C. To secrete metabolic wastes and harmful drugs into the tubule that were not filtered at the glomerulus. D. By reabsorbing and secretion solute and water, it modifies the original filtrate and determines the final concentration and volume of the urine. Q2. What does NOT play a...
1. If a sensory neuron is voltage-clamped at -70 millivolts in normal saline (so all ion...
1. If a sensory neuron is voltage-clamped at -70 millivolts in normal saline (so all ion channels can work) you would expect to see: a)relatively little current flow, since this is near the resting potential, where the membrane potential is mostly balancing the concentration gradients for the various ions b)a large positive current inward as potassium enters the cell c)a large positive current inward as sodium enters the cell d)a large positive current outward as sodium leaves the cell 2....
Which of the following allows the cell to recover from hyperpolarization during an action potential? A....
Which of the following allows the cell to recover from hyperpolarization during an action potential? A. Stimulus gated sodium channels B. Voltage gated sodoum channels C. Voltage gated potassium channels D. Sodium/ Potassium pump
1.)ATP is hydrolyzed when protein __________ transfer solutes from outside of the cell to the inside....
1.)ATP is hydrolyzed when protein __________ transfer solutes from outside of the cell to the inside. This is a(n) _____________ transport process. a) receptors; passive b) pumps; active c) cell-adhesion molecules; active d) channels; active e) cell-identity markers; passive 2.)A neurotransmitter (NT) is released into the synaptic cleft when _________ enters the synaptic knob and the N.T is broken down by __________ on the post-synaptic membrane. a) calcium; hexokinase b) potassium; voltage gates c) calcium; an enzyme d) sodium; an...
The standard free energy that is required for the sodium-potassium ATPase to pump two K+ ions...
The standard free energy that is required for the sodium-potassium ATPase to pump two K+ ions into the cell and three Na+ ions out is +43.8 kJ/mol but the standard free energy change of hydrolysis of ATP is only -32 kJ/mol. This apparent imbalance of free energy can be accounted for because: A) the movement of Na+ ions is down the concentration gradient . B) the movement of K+ ions is down the concentration gradient. C) the free energy provided...
ii. What important electrolyte receptors in the hypothalamus respond to synthesized ADH? a. bicarbonate b. sodium...
ii. What important electrolyte receptors in the hypothalamus respond to synthesized ADH? a. bicarbonate b. sodium c. potassium d. chloride iii. What is the most important function of the urinary system? a. regulation and buffering of the pH b. excretion of metabolic waste c. regulation of the volume and composition of the extracellular fluid d. all of the above iv. Why is creatinine used to determine the kidney function of an individual? a. creatinine is filtered regardless the kidney function...
2. Under physiological conditions, the Na+-K+ pump transports sodium and potassium across the membrane through the...
2. Under physiological conditions, the Na+-K+ pump transports sodium and potassium across the membrane through the hydrolysis of ATP. This occurs in a sequence of steps. A. (5pts) Beginning with the START step, put the other steps a-e (currently listed in random order) of the Na+-K+ pump’s mechanism in order to complete a full cycle of transport. START – The protein is phosphorylated open to the extracellular side, and contains 2 K+ ions. a. ATP hydrolysis, protein phosphorylation, and ADP...
Predict the effect of hypothermia and dehydration (low blood flow) on release of neurotransmitter (ACh) on...
Predict the effect of hypothermia and dehydration (low blood flow) on release of neurotransmitter (ACh) on the muscle fiber? (Think about the relationship of aerobic mechanism, ATP, mitochondria, exocytosis, active and transport) a. more ACh releases b. less ACh release c. same amount of ACh release d. none of the choices Acetylcholine is released from a neuron / Through exocytosis when a vesicle fuses with the membrane. true and false Symport active transporters move two substances across the membrane in...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT