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Which of the following solutes moves down its concentration gradient during secondary active transport?

Net movement of a gas between two compartments can occur when that gas is at equilibrium.

What is the PCO2 of blood entering the systemic capillaries?

How many ribosomal RNAs are present in ribosomes?

If a polypeptide has six amino acids at the end of translation, how many elongation cycles occurred during its synthesis?

Use the table below for calculating the partial pressure of gases. Use the exact number given in the table.  The atmospheric pressure in Odessa is 670 mm Hg. Today 3% of gas molecules are water vapor at this elevation. What is the PH2O in Odessa today, rounded off to the nearest whole number? [partialpressure1] What is the PO2 today, rounded off to the nearest whole number? [partialpressure2] 

Which of the following are processes of external respiration? (Select all that apply.)

If the glomerular filtration pressure is a negative value, it means that fluid movement is from the glomerulus to Bowman’s capsule. 

Which of the following are common modifications to mRNA? (Select all that apply.)

Aquaporins are located in both the basolateral and apical membranes of proximal tubule epithelial cells.