What determines the direction of the voltage change that occurs at the postsynaptic membrane?
A. The type of neurotransmitter
B. The number of ion channels on the postsynaptic membrane
C. The type of second messenger system used
D. The type(s) of ions that travel through opened channels
Answer: D
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Which of the following statements is false?
a. Ovulation occurs when the follicle ruptures and releases an egg. b. The zygote divides by mitosis during cleavage. c. Fertilization occurs in the upper regions of the oviduct. d. The blastocyst implants in the endometrial lining of the uterus. e. Implantation occurs about 36 hours after fertilization.
Rheumatoid arthritis, type 1 diabetes, and systemic lupus erythematosis are examples of
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The evolution of many closely related species from one or a few ancestral species in a relatively short
period of time is referred to as: a. allometric growth. b. preadaptations. c. adaptive radiation. d. microevolution. e. allopatric speciation.