One of the genes that has been related to essential hypertension codes for the plasma protein
A. angiotensinogen.
B. hemoglobin.
C. insulin.
D. atrial natriuretic factor.
E. albumin.
Answer: A
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In which region of the nephron does the fractional reabsorption of water vary the most in response to variation in the state of hydration?
A. The collecting duct B. The glomerulus C. The distal convoluted tubule D. The proximal convoluted tubule E. The loop of Henle
The blood-brain barrier protects the brain from harmful substances in the blood, but it also protects the brain from potentially therapeutic chemicals that may reduce the size of brain tumors by killing cancer cells, alleviate depression, and aid in patient recovery from stroke or spinal cord injury. Two methods are currently being rigorously researched to get these helpful chemicals past the
blood-brain barrier. The two methods are termed "molecular Trojan Horse" and osmotic "blood-brain barrier disruption." Based on their names, hypothesize how these methods might allow chemicals to pass through the blood-brain barrier. What will be an ideal response?
The blood-brain barrier results mostly from the action of ________, a type of neuroglia.
A. ependymal cells B. astrocytes C. oligodendrocytes D. microglia
The membrane connections that prevent the leaking of fluid between cells are called ________
A) gap junctions B) tight junctions C) desmosomes D) microvilli