The ANS uses pathways that include two-neuron chains to innervate its effector organs
Indicate whether this statement is true or false.
TRUE
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A friend confides that she desires to have children but is having trouble conceiving. Which of the following is true regarding implantation?
A) An estimated 60% of implanted embryos later miscarry due to genetic defects of the embryo. B) Detection of human chorionic gonadotropin (hCG) in blood or urine indicates failure of the blastocyst to implant. C) It is estimated that a minimum of two-thirds of all zygotes formed fail to implant by the end of the first week or spontaneously abort. D) In cases where implantation fails to occur, a nonreceptive uterus becomes receptive once again.
Which of the following statements is true?
a. Structure/function relationships are evident at the organismal level, but not at the molecular level. b. Evolution by natural selection led to physiologic adaptation historically, but is not relevant to extant organisms. c. Homeostasis is the tendency toward relative stability in the internal environment of an organism. d. Feedback control refers specifically to the homeostatic mechanisms that help organisms stop eating when they’re satiated.
Which of the following locations have ciliated cells?
Respiratory and digestive systems Female reproductive and lymphatic systems Respiratory and female reproductive systems Digestive and lymphatic systems
Nonencapsulated lymphatic tissue called MALT includes all of the following except ________.
A. diffuse lymphatic tissue B. tonsils C. lymph nodes D. Peyer patches