Infection by HIV can eventually lead to the development of a condition called ________, which is diagnosed when the T helper cell count drops below ________
Fill in the blank(s) with correct word
AIDS (acquired immune deficiency syndrome); 200
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Which of the following is not true regarding Entamoeba histolytica?
A. Entamoeba histolytica cysts pass through the stomach unharmed. B. Entamoeba histolytica produces enzymes that degrade epithelial tissue. C. Entamoeba histolytica always remains in the intestinal tract during an infection. D. Entamoeba histolytica grazes on bacteria in the intestines.
Which of the following is NOT a function of parathyroid hormone?
A. It increases calcium production in the liver. B. It increases calcium absorption across the intestine. C. It increases reabsorption of Ca2+ in the kidney. D. It stimulates osteoclasts to dissolve CaPO4 crystals in bone.
Which of the following organelles plays an important role in apoptosis, or programmed cell death?
a. ribosomes b. mitochondria c. chloroplasts d. vacuoles e. peroxisomes
Which of the following tissue types will produce root hairs within the zone of maturation?
A. endodermis B. cortex C. vascular tissue D. epidermis