The clear portion of the anterior portion of the outer layer of the eye is called the ____.
A. Choroid
B. Cornea
C. Sclera
D. Retina
Answer: B. Cornea
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The movement of substances from the blood into the proximal tubule is known as ____.
Fill in the blank(s) with the appropriate word(s).
Give some reasons as to why some people become obese whereas others do not.
What will be an ideal response?
A 1-year-old boy is evaluated for a suspected immune deficiency. He has a history since birth of eczema, recurrent rashes, and diarrhea. His white blood cell count (WBC) count is 6.75/uL (normal values: 5.0-10.8 x 103 uL) with a normal differential. Platelet count is 35,000 (normal values: 150,000- 350,000/uL), and the platelets are small. His IgG is 750 mg/dL (normal values: 600-1,500 mg/dL). IgM is 30 mg/dL (normal values; 75-150 mg/dL). IgA is 475 mg/dL (normal values: 50-125 mg/dL). IgE is 750 mg/dL (10-50 mg/dL). The boy's blood is typed as O-positive, and he does not have anti-A or anti-B antibodies. Flow cytometry performed on his blood shows 11% CD19 (normal values: 5%-20%) and 50% CD3 cells (normal values: 60%-80%) with a normal ratio of CD4:CD8. T-cell function tests are
abnormal. This boy most likely has: A. Bruton's tyrosine kinase deficiency. B. Wiskott-Aldrich syndrome. C. DiGeorge anomaly. D. ataxia telangiectasia.
Gas exchange in the aquatic salamander known as the axolotl is correctly described as
A) active transport to move oxygen into the salamander from the water. B) carrier-mediated transport to move oxygen into the salamander from the water. C) facilitated diffusion of carbon dioxide from the salamander into the water. D) simple diffusion of oxygen into the salamander from the water. E) active transport of carbon dioxide from the salamander into the water.