In diffusion, movement of particles across a membrane is driven by differences in

A. force.

B. concentration.

C. size.

D. shape.

la membrana plasmática conforma la frontera de este sistema abierto que es la célula. Esta esta formada por biomoléculas que son?

2. What are three important uses for stem cells?

What has icy waters that are rich in nutrients

Which of the following most accurately describes the process that must occur when working with research animals covered by U. S.

5'-aug-3' is a codon that specifies what amino acid? spell out the name of the amino acid completely and correctly.

Name the cells that are produced by the testes and ovaries

What description best explains why viruses can become more pathogenic to hosts that were not affected by the virus before?

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of

From day 23 to 28 the progesterone levels are dropping. What effect will this eventually have on the endometrium?

When both muscles of this pair are contracted simultaneously, they flex the neck forward. When both muscles of this pair are contracted simultaneously, they flex the neck forward. a. platysma b. semispinalis c. sternocleidomastoid d. trapezius