Describe the nature and location of intracellular receptors for hormones that pass easily through cell membranes. Explain how their role compares to the signal-transduction pathway notes above, and describe the changes they are likely to trigger within the target cell.

Hormones that pass easily through the cell membrane are lipid soluble hormones. Receptors for these types of hormones are located within the cell; therefore, these hormones pass through the plasma membrane of cell in order to bind to these receptors. On the other hand, signal transduction pathways bind to receptors located on the plasma membrane in order to activate these types of reactions

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.