In a __________ feedback loop, both the endocrine and nervous systems can be involved
A) First order
B) Second order
C) Third order
D) Both B and C
Fill in the blank with the correct answer.
Answer: D
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Compounds released from cells that influence the same cell are called ________.
A. steroidal hormones B. tropic hormones C. neuropeptides D. autocrine chemical messengers E. paracrine chemical messengers
Which of the following does not produce chewing movements of the mandible?
A. Masseter B. Lateral pterygoid C. Medial pterygoid D. Thyrohyoid E. Temporalis
The placenta allows
A. carbon dioxide and other wastes to diffuse from the maternal blood to the embryonic blood. B. oxygen and nutrients to diffuse from maternal blood to the embryo. C. maternal blood to mix with fetal blood. D. the fetus to enlarge without rupturing the mother's abdomen.
When the neck is bent sharply, the trachea becomes closed
Indicate whether the statement is true or false