In investigating the cause of thinning hair, which of the following questions needs to be asked? a. Is the diet deficient in proteins? b. Is the person taking megadoses of vitamin C? c. Has the person been exposed to excessive radiation? d. Has the person recently suffered severe emotional trauma?

Which is not a component of sweat? a. Water, b. Sodium chloride, c. Sebum, d. Ammonia, e. Vitamin D.

For diffusion to occur, there must be a. a selectively permeable membrane. b. equal amounts of solute. c. a concentration difference. d. some sort of carrier system. e. all of the above.

Which of the following are possible functions of the glycoproteins in the plasma membrane? a. Determination of blood groups, b. Binding sites for toxins or bacteria, c. Aiding the binding of sperm to egg, d. Increasing the efficiency of absorption.

Which one of the following is not associated with the production of perspiration? a. Sweat glands, b. Sweat pores, c. Arrector pili, d. Eccrine gland, e. Apocrine gland.

In which of the following tissue types might you expect to find goblet cells? a. Simple cuboidal, b. Simple columnar, c. Simple squamous, d. Stratified squamous, e. Transitional.

Serous membranes a. line the mouth. b. have parietal and visceral layers. c. consist of epidermis and dermis. d. have a connective tissue layer called the lamina propria. e. secrete a lubricating fluid.

Which structure is not associated with a nail? a. Nail bed, b. Lunule, c. Nail folds, d. Nail follicle.

Gustatory cells are a. bipolar neurons. b. multipolar neurons. c. unipolar neurons. d. epithelial cells.

Which of the following groupings of the abdominopelvic regions is medial? a. Hypochondriac, hypogastric, umbilical, b. Hypochondriac, lumbar, inguinal, c. Hypogastric, umbilical, epigastric, d. Lumbar, umbilical, iliac, e. Iliac, umbilical, hypochondriac.

A neurosurgeon orders a spinal tap for a patient. Into what body cavity will the needle be inserted? a. Ventral, b. Thoracic, c. Dorsal, d. Cranial, e. Pelvic.

Which is not a component of sweat? a. Water b. Sodium chloride c. Sebum d. Ammonia e. Vitamin D

From what types of damage does the skin protect the body?

No critical points or endpoints exist We know how to find the extreme values of a continuous function $f(x)$ by investigating its values at critical points and endpoints. But what if there are no critical points or endpoints? What happens then? Do such functions really exist? Give reasons for your answers.