A plant cell is put in a sucrose solution with Ψs of -10 bar. When the plant cell reaches equilibrium it has a Ψp of 6 bar. What is the tonicity of this solution in respect to this cell at equilibrium? a) Hypertonic
b) Isotonic
c) Hypotonic
d) All of the above

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

According to cell theory; which structures carry out the basic function of living things? a. atoms b. organs c. cells b. nuclei

When muscles contract, they become .