Which of the following is a hormone that is released by fat cells?
A) Glucagon B) Prolactin C) Leptin D) Epinephrine E) Oxytocin
C
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In which cycles are the nutrients found in a gas form?
a. atmospheric cycles b. global cycles
c. water cycles d. sedimentary cycles e. plant-animal cycles
Neurotransmitters affect postsynaptic cells by _____
I) initiating signal transduction pathways in the cells II) causing molecular changes in the cells III) affecting ion-channel proteins IV) altering the permeability of the cells A) I and III B) II and IV C) II and III D) III and IV E) I, II, III, and IV
The enzyme ________, that is found in tears and saliva, can hydrolyze the bonds in the glycan chains of certain bacterial cell walls.
Fill in the blank(s) with the appropriate word(s).
True or False: Altruism occurs when an individual reduces his or her own fitness and increases the fitness of another individual
A. true B. false