Question:
Which of the following statements correctly describe(s) the driving forces for diffusion of Na+ and K+ ions through their respective channels? Select all that apply.
A)The diffusion of Na+ ions into the cell is facilitated by the Na+ concentration gradient across the plasma membrane.
B)The diffusion of Na+ ions into the cell is impeded by the electrical gradient across the plasma membrane.
C)The diffusion of K+ ions out of the cell is impeded by the K+ concentration gradient across the plasma membrane.
D)The diffusion of K+ ions out of the cell is impeded by the electrical gradient across the plasma membrane. The electrochemical gradient is larger for Na+ than for K+.
Answer:
"The concentration gradient and the electro-chemical gradient" describes the driving forces for diffusion of Na+ and K+ ions through their respective channels
Explanation:
The Na ions diffusion inside the cell is facilitated by the concentration gradient of the Na ions which is present across the plasma membrane. Hence, the diffusion of the K ions which is present outside the cell and will be impeded due to the electrical gradient which is present near the plasma membrane. Thus, the electro-chemical gradient is greater as compared to the Na ion than that of the K ion.
Answer:
10 400 N
Explanation:
A drag force is an oppositional or limiting force which must be overcome before an object must move wit a force. The lesser the drag force, the higher the probability that an object would move easily.
From the question give, the resultant force of the was is 600 N and force from the engine - 11 000 N.
Drag force = 11 000 - 600
= 10 400 N
The drag force on the car is 10 400 N.
This shows that the car would not move since the drag force (10 400 N) is far greater than the resultant force(600 N).
Answer:
A substance that is dissolved in a solution is called a solute
Explanation:
Solute is the substance which is dissolved
Solvent is where you dissolve the solute (usually liquids)
Solution = Solute + solvent
C.354
1L/1000cm^3
0.354L/ycm^3 *1L/1000cm^3
Cross multiply 0.354 by 1000and then divide by one to get 354.
Molar mass arsenic = 74.92 g/mol
1 mole ---------- 74.92 g
? mole ----------- 1.90 g
moles = 1.90 * 1 / 74.92
= 0.02536 moles of arsenic
hope this helps!