QUESTION 6 Which of the following statements is correct? -40 -50 -60- DE F -70- A B C -80 - -90 Time "F" represents an action potential "D" represents membrane repolarization "A" represents a hyperpolarizing graded potential "B" represents a graded depolarization of the cell membrane O O O O Membrane potential (mV)

QUESTION 10 Which of the following statements is false concerning the motor protein families of kinesins and dyneins? Kinesins and dyneins A OG OD. have tails that bind to the actin filaments move along microtubules, actin filaments, and intermediate filaments derive their energy strictly from GTP hydrolysis All of the above

Question 66 When a cell membrane potential shifts from -70mV to -90mV we say the membrane has: O depolarized O repolarized O hyperpolarized O polarized A Moving to another question will save this response. 17 stv MacBook Air DII F2 F3 F4 F5 F6 F7 F8 @ %23 2$ へ 7 8 W R T Y D F C ンU) つ B LE # 3

QUESTION 4 What is the name of the change in Vm labeled B? +40 +20 Membrane potential difference (Vm) at rest -20 Vm -40 Vm -60 -80 В -100 -120 Time (msec) Membrane potential (mV)

Do question 11

QUESTION 14 Which of the following is mismatched? Symport carrier - transmembrane protein Leak K* channel - peripheral protein Primary active transporter - transmembrane protein Gs protein - peripheral protein

QUESTION 3 What type of cells are shown in this figure? Membrane D Compartment A Compartment B Compartment C Membrane E Exchange Epithelia Secretory Epithelia Transporting Epithelia Protective Epithelia

QUESTION 2 Which of the following is a way that an ion can enter or leave the cell? Select all correct answers. O through a pump O through a leak channel through a gated channel through simple diffusion

Question 25 Which of these is a characteristic of epithelial tissue? It usually has rich blood supplies O It has no nerves and sensitivity O It usually has specialized cells It has apical and basal surfaces It is not capable of regeneration

QUESTION 6 In a voltage clamp: O A. A constant current across the membrane is maintained in order to counter balance changes in membrane potential. O B. A variable voltage is applied across the membrane in order to maintain a constant membrane potential O C.Avariable current is applied across the cell membrane in response to changes in the ion concentration outside the cell. O D.Changes in current applied to a membrane in order to maintain a constant voltage represent the flow of ions through channels in the membrane O E. both A. and C. O F. Both B. and D.