Exam 1 corrections A&P

6. Consider the bonds of the water molecule and the overall nature of the molecule. Which of the following is true?

The bonds and the molecule are both polar

7. Consider the following reversible reaciton: If the reaction is first allowed to reach equilibrium, then Y is added, what will happen?

The reaction will run to the left

16. List the 4 basic tissue types and list one characteristic of each:

Epithelial - avascular

Connective - prominent extracellular matrix

Nervous - relays signals

Muscle - contracts

17. Metabolically-active epithelial cells tend to be:

Taller

19. Diffusion occurs BEST across what type of epithelia?

• Simple

• Squamous

20. Which of the following cell:cell junctions enforce(s) the polarity of an epithelial cell?

Tight junctions

21. Tendons consist of what type of connective tissue?

Dense regular connective tissue

22. What are the three molecules that give skin its color, and what color does each molecule impart?

1. Melanin - brown/black

2. Carotene - yellow/orange

3. Hemoglobin - red/pink

23. The tensile strength of skin is provided by which layer? CHOOSE ONE:

Reticular layer (of dermis)

25. Which structure responds to vibration and sudden changes in pressure?

Not E

26. Why do no skin cancers arise from the apical-most layer of the epidermis

The apical-most layer consists of dead cells that lack nuclei and cannot replicate

27. Approximately what percent of this patient's skin is burned?

27%

28. Does this patient qualify for fluid resuscitation?

They qualify for intravenous fluid resuscitation

29. What is the function of structure B

Provides mechanical stability

30. Place layers of epidermis in order from deep (#1) to superficial (#4)

4 - Stratum Corneum

3 - Stratum Granulosum

2 - Stratum Spinosum

1 - Stratum Basale

31. Why might a patient with a 3rd-degree burn feel pain?

a. third-degree burns may be surrounded by less-severe burns

32. Given the potential for blood loss, why do people have sizeable veins in their superficial fascia?

Superficial veins have an important role in thermoregulation

34. What is the difference between relative and absolute refractory periods?

Relative - second action potential can be triggered

Absolute - no second action potential can be triggered

36. Which of the following create/enforce the refractory period of an action potential?

Na+ channel deactivation gates

38. Which of the following is/are TRUE regarding an action potential?

c, d, e