Which of the following choices

Which of the following choices correctly discusses the continuity of the following function?

F(x)= (x+3)/(x^2-9)

A. F(x)is continuous on (neg. infinity, -3)U (-3,3)U (3, infinity). F(x) has a removable discontinuity at (3,1/6) and a nonremovable discontinuity at x=-3.

B. F(x) is continuous on (neg. infinity, 3)U (3,infinity). F(x) has nonremovable discontinuity at x=3.

C.F(x) is continuous on (neg. infinity, -3)U (-3,3)U (3, infinity). F(X) has nonremovable discontinuity at x=3 and a removable discontinuity at (-3,-1/6).

D. F(x) is continuous on (neg. infinity, -3)U (-3,infinity). F(x) has nonremovable discontinuity at x=-3.

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Which of the following choices

Which of the following choices correctly fills in the blanks?

After repolarization, the sodium ions are found _____A_______ the neuron and the potassium ions are found ______B_____ of the neuron. This reversal of ions can be fixed by the action of ____________C______________. ____D____ sodium ions are taken out and ___E____ potassium ions are brought in.


A  B  C  D  E
outside  inside  Na+/K+ exchange pump two    three

A  B  C  D  E
outside  inside    voltage gated channels two    three

A  B  C  D  E
inside  outside   Na+/K+ exchange pump three two

A  B  C  D  E
inside  outside   voltage gated channels three two

Which of the following choices

29. If Carbon dioxide levels rise in the body, negative feedback mechanisms will trigger

a. an increase in breathing so that carbon dioxide levels decline to the set point

b. an increase in breathing so that carbon dioxide levels rise futher above set point

c. a decrease in breathing so that carbon dioxide levels rise to the set point

d. a decrease in breathing so that carbon dioxide levels decline below set point.

30. Which of the following choices places the components of a homeostatic control system in proper order?

a. Effector, control center, stimulus, receptor

b. Stimulus, receptor, control center, effector

c. Receptor, effector, control center, stimulus

d. Stimulus, control center, effector, receptor

e. Receptor, control center, stimulus, effector

31. The part of the homeostatic control mechanism that brings about change is the 

a. control center

b. stimulus

c. effector

d. receptor

32. The central nervous system acts as the control center for the regulation of blood calcium and  blood glucose


33. Disease is often considered the result of 

a. negative feedback

b. failure of homeostatic systems

c. maintance of set point

d. feedback loops

34. Diagnosing a disease involves determining the

a. cause of the homeostatic imbalance

b. multiple side effects of a drug

c. effector and the set point

d. negativity of the feedback 



23. What is the anatomic term for the foot?

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