4yo girl with 5lb weight loss during the last 2 months. no hx of illness, on no medications, immunizations up to date. 50th %ile for height, 25th %ile for weight. occasional crackles over right middle lung field. intradermal testing with ppd, tetanus, and antigens for candida and trichophyton is nonreactive at 72 hours. wbc count is 5100. nucleic acid hybridization testing of gastric aspirates shows tb. most likely explanation?

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.

nb

explanation:

kj