Some researchers think pheromones are important tools in human communication. Pheromones are chemical signals that one individual sends to another. What research questions might be asked by anatomists, and what questions might be asked by physiologists, to determine if pheromones are important to humans?
What will be an ideal response?
Students might consider that anatomists would look for organs (and cellular machinery) to transmit pheromones and to receive them. Comparative anatomists might also look for structures in the brain that are homologous to pheromone processing areas in animals. Physiologists might study how pheromones are released, received, and processed. These studies could involve cellular and molecular approaches and would involve multiple organ systems (e.g., integumentary and nervous systems).
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The process of embryogenesis includes
A. gastrulation. B. gametogenesis. C. formation of a zygote. D. fertilization.
The most common stimulus for prodding endocrine glands into action is ________.
The embryonic urethral fold becomes the female ________.
A. glans clitoris B. labia minora C. labia majora D. All of the choices are correct.
Correctly order the following key steps in the process of endochondral ossification
1. Chondrocytes die. 2. Osteoblasts build the bone collar on the external surface of the bone. 3. Perichondrium is invaded by blood vessels. 4. In the primary ossification center, osteoblasts replace calcified cartilage with early spongy bone. 5. Perichondrial cells differentiate into osteogenic cells then into osteoblasts. A) 4, 3, 2, 1, 5 B) 3, 5, 2, 1, 4 C) 3, 1, 2, 3, 5 D) 3, 1, 4, 5, 2