The physiological concentration of monovalent salt ions (primarily sodium, potassium, and chloride) in the human body is on the order of 0.15 molar (0.15 moles per liter or 150 moles per meter cubed). Let's assume that ions only within one nanometer (1x10-9 m) of the membrane cell wall participate in creating the resting and action potentials, which is also a few hundredths of a volt but with opposite polarity (during a pulse the potential outside the axon is temporarily smaller than the potential inside the axon). Considering your answer to the previous problem: a. Are very many of the ions transferred across the member to change the potential during a nerve pulse?
b. And what does this tell us about the change in concentration of the salt ions near the cell wall with respect to physiological concentrations?

Which phrases describe an extrusive rock? check all that apply. fine texture cooled slowly small crystal size found deep underground different, easily observed minerals

Which represents a negative impact of technology

Will mark brainliest i only need the ! 1.use ten beads and a centromere of one color to construct the long chromosome. use ten beads and a centromere of a second color to construct the second chromosome in the long pair. make a drawing of the chromosomes in the space below. 2. for the second pair of chromosomes, use only five beads. 3. now model the replication of the chromosomes. make a drawing of your model in the space below. part b: meiosis i during meiosis i, the cell divides into two diploid daughter cells. 4. pair up the chromosomes to form tetrads. use the longer tetrad to model crossing-over. make a drawing of the tetrads in the space below. 5. line up the tetrads across the center of your “cell.” then model what happens to the chromosomes during anaphase i. 6. divide the cell into two daughter cells. use the space below to make a drawing of the result. part c: meiosis ii during meiosis ii, the daughter cells divide again. 7. line up the chromosomes at the center of the first cell, one above the other. separate the chromatids in each chromosome and move them to opposite sides of the cell. 8. repeat step 7 for the second cell. 9. divide each cell into two daughter cells. use the space below to make a drawing of the four haploid cells