Author Question: Facilitated diffusion is a type of absorption that requires a special carrier to transport a ... (Read 71 times)

jilianpiloj · **on:** Aug 2, 2018

Facilitated diffusion is a type of absorption that requires a special carrier to transport a molecule across the cell membrane and

a. requires energy.
b. does not require energy.
c. is also called pinocytosis.
d. is also called passive diffusion.

Question 2

Which of the following clients is most likely to be experiencing a positive nitrogen balance?

1. A 23-year-old college student studying chemistry
2. A 13-year-old girl who figure skates
3. An elderly female with a small decubitus on her left heel
4. A middle-aged male who had open heart surgery two days ago

raenoj · **Reply #1 on:** Aug 2, 2018

Answer to Question 1

B
Facilitated diffusion allows absorption of molecules into cells from an area of low concentration to an area of high concentration; it uses a carrier protein but does not require energy. In pinocy-tosis a nutrient or liquid is engulfed by part of the cell membrane and taken into the cell in a va-cuole. Passive diffusion does not use a special carrier protein; nutrients pass from an area of high concentration to an area of low concentration.

Answer to Question 2

2
Rationale: A positive nitrogen balance exists when nitrogen intake exceeds losses. A growing, active adolescent is likely to have a positive nitrogen balance to meet rapid growth and development needs. A college student is likely to have nitrogen equilibrium since nitrogen is no longer needed for rapid growth and development. The adults who have significant health problems are in a state of negative nitrogen balance.