Question

1.) If the resting membrane potential for a cell is stated as being -65 mV, this means: (choose all that apply)

Group of answer choices

- there is a 65 mV potential difference across the plasma membrane

- the intracellular side of the plasma membrane has a negative charge

- the E_K is balanced by a +25 mV E_Na

- the extracellular side of the plasma membrane has an excess of positive charge

- the membrane has an outward flux of chloride ion (Cl^-) of 25mV

2.) Which of the following statements is(are) not true for the extracellular matrix? (choose all that apply)

Group of answer choices

- if a functional entity and is involved in physically joining the extracelluar and intracellular compartments

- is comprised of living material

- provides a platform for cell growth

- is the site where interstitial fluid is located

- is only found in connective tissues

3.) The magnitude of the  (blank, two words) is the driving force for diffusion, yet a molecule will not diffuse across if the plasma membrane is not (blank) to that molecule

4.) If the intracellular chloride ion concentration of a cell is 9 mM and has an extracellular concentration of 125 mM, then the equilibrium potential for chloride ion is ___ mV. (round to the nearest 10th decimal place)

5.) A ___ ___ is observed due to the unequal transport of charge by a transport mechanism that occurs across a plasma membrane.

Answer 1

1) A) there is a 65 mV potential difference across the plasma membrane

B) the intracellular side of the plasma membrane has a negative charge

D) the extracellular side of the plasma membrane has an excess of positive charge

2)

A) if a functional entity and is involved in physically joining the extracelluar and intracellular compartments

C) provides a platform for cell growth

D) is the site where interstitial fluid is located

Explanation:- Extracellular matrix is the fluid material present in the Extracellular space. It connects intracellular space with extracellular space. It is the site where interstitial fluid is present. It provides envrionment for the growth of the cell.

3.) The magnitude of the Concentration gradient is the driving force for diffusion, yet a molecule will not diffuse across if the plasma membrane is not permeable to that molecule.

4) If the intracellular chloride ion concentration of a cell is 9 mM and has an extracellular concentration of 125 mM, then the equilibrium potential for chloride ion is -69.70__ mV.

5.) An_Electrical graient__ ___ is observed due to the unequal transport of charge by a transport mechanism that occurs across a plasma membrane.