A community health care worker is explaining to a group of ...

[Chelseaamend]

A community health care worker is explaining to a group of factory workers the importance of wearing gloves when working with strong chemicals such as turpentine and paint thinner.
 
  Which of the following characteristics of cell membranes underlies the nurse's teaching?
  A)
  Cell membranes are impermeable to all but lipid-soluble substances.
  B)
  Cell membranes have a hydrophilic head and a hydrophobic tail.
  C)
  Cell membranes contain receptors for hormones and biologically active substances.
  D)
  Transmembrane proteins can pass through the cell membrane into the intracellular environment.

Question 2

The first-time parents of an infant girl 2 days postpartum are distressed at the jaundiced appearance of her skin and are eager for both an explanation and treatment for the problem.
 
  Which of the following responses by their physician is most accurate?
  A)
  Your daughter's young liver is unable to get rid of the waste products from old red blood cells.
  B)
  Because your daughter's kidneys are so small, they have a hard time getting rid of the wastes that are always accumulating in her blood.
  C)
  Nearly half of all infants have this problem, and while it is distressing to look at, it is largely harmless and will resolve in time.
  D)
  This is a sign that your baby needs more milk than she is currently getting, and increased breast-feeding will act to flush these pigments out of her system.

[ririgirl15]

Answer to Question 1

Ans:
A

Feedback:

Because cell membranes are soluble to some lipid-soluble substances such as organic solvents, such substances should be kept from direct contact with skin cells. The facts that cell membranes have a hydrophilic head and a hydrophobic tail and contain receptors for hormones and biologically active substances do not have a bearing on the nurse's teaching. While transmembrane proteins can indeed pass into the intracellular environment, the nurse is not referring to proteins in the teaching.

Answer to Question 2

Ans:
A

Feedback:

Bilirubin is formed from the breakdown of hemoglobin in red blood cells. Normally about two thirds of the unconjugated bilirubin produced by a term newborn can be effectively cleared by the liver. However, the relative immaturity of the newborn liver and the shortened life span of the fetal red blood cells may predispose the term newborn to hyperbilirubinemia. Bilirubin clearance is not the domain of the kidneys, and treatment is often necessary. Jaundice can sometimes be addressed by increasing breast-feeding, but it is not a sign in and of itself of insufficient feeding.