Disappearance of which type of junction most likely contributes to the metastasis of cancer cells throughout the body?
A) tight
B) anchoring
C) gap
B) anchoring
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An important mechanism that controls metabolic pathways under physiological conditions is
A. negative feedback. B. positive feedback. C. signal transduction. D. genetic control.
Muscle fibers differ from "typical cells" in that muscle fibers
A) lack a plasma membrane. B) have many nuclei. C) are very small. D) lack mitochondria. E) have large gaps in the cell membrane.
It is late at night, and you are at the library doing some last-minute studying for your comparative physiology exam. You suddenly feel hungry, and you head to the vending machine to buy a snack
Explain the role of the following sensory structures/organs, and give an example of how/when they will be active during this task. a. Merkel cell b. Gustatory receptors (choose one) c. Macula of a utricle d. Cone photoreceptor What will be an ideal response?
Lipid is concentrated with the cells of the
A) hypodermis. B) dermis. C) cornified region. D) stratum granulosum. E) stratum spinosum.