Explain the negative feedback loop by which erythropoiesis is regulated
What will be an ideal response?
The negative feedback loop that maintains erythropoiesis primarily involves the hormone erythropoietin (EPO), with the concentration of oxygen in the blood influencing the production of this hormone. When blood oxygen levels fall below normal, kidney cells detect the falling oxygen levels. The kidneys produce more EPO and release it into the blood. Erythrocyte production in the red bone marrow increases and homeostasis is restored when blood oxygen levels return to normal.
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Epithelial tissue functions in
A. contraction, movement, and reflexes. B. reacting to stimuli, thinking, and remembering. C. nourishing and hydrating tissues. D. secretion, absorption, and protection.
After forming a complex with the ribosome, mRNA interacts with a third molecule. This molecule is called
A) rRNA. B) DNA. C) rough ER. D) an amino acid. E) tRNA.
The kidneys play a major role in the regulation of which of the following? select all that apply.
a) electrolytes b) cholesterol levels c) acid-base balance d) body temperature
The vascular tunic of the eye has three distinct regions. From anterior to posterior what are they?a: Ciliary bodyb: Choroidc: Iris
A. c, a, b B. b, c, a C. b, a, c D. c, b, a E. a, b, c