Which organs are often analyzed for cancer cells to determine whether the tumor has metastasized?
A) liver
B) lymph node
C) pancreas
D) ovary
B
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Genes in the Hox family of homeobox genes control the body plans of animals along the ____ axis, including where
____ will develop on the animal’s body.
a. dorsal-ventral; appendages b. dorsal-ventral; light-sensing organs c. internal-external; internal organs d. anterior-posterior; appendages e. anterior-posterior; light-sensing organs
In the future, drugs may block which microbial communication process to effectively treat infections?
What will be an ideal response?
Which statement about the regulation of respiration is FALSE?
a. Respiratory centers in the medulla control the transition from inspiration to expiration. b. Carbon dioxide concentration is the most important chemical stimulus for regulating respiratory rate. c. Chemoreceptors in the walls of various arteries are sensitive to carbon dioxide levels in the blood. d. A group of neurons in the ventral medulla only become active when we need to breathe forcefully. e. Chemoreceptors may be sensitive to oxygen, carbon dioxide, and/or hydrogen ion concentration.
The function of the kidney is to filtrate and reabsorb the body fluid. Which of the following structures is the filtration apparatus of a kidney?
a. Glomerulus b. Loop of Henle c. Nephron d. Bowman's capsule e. Juxtaglomerular apparatus (JGA)