Mr. Tushman looked right at me and smiled and nodded. He put his hand out for me to shake. "Hi, August," he said, totally normally. "It's a pleasure to meet you." "Hi," I mumbled, dropping my hand into his hand while I looked down at his feet. He was wearing red Adidas. —Wonder R. J. Palacio.

What text details help you infer that August is nervous about meeting Mr. Tushman? Check all that apply.

A.) Mr. Tushman looks right at August and smiles.

B.) Mr. Tushman says hello to August totally normally.

C.) August mumbles "hi" to Mr. Tushman.

D.) August shakes Mr. Tushman's hand.

E.) August looks down at Mr. Tushman's shoes.

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.