Question

multiple select question
select all that apply
choose all in which capillary filtration exceeds capillary reabsorption.

• capillaries in resting tissue
• alveolar capillaries in the lungs
• glomeruli in the kidneys
• capillaries in active muscles

Explanation:

1. Capillaries in resting tissue: In resting tissue, capillary reabsorption is generally equal to or slightly exceeds filtration under normal conditions, so this is not correct.
2. Alveolar capillaries in the lungs: In alveolar capillaries, reabsorption (fluid moving back into capillaries) is dominant as the lungs need to keep the alveoli dry, so filtration does not exceed reabsorption here.
3. Glomeruli in the kidneys: The glomerular capillaries have a high hydrostatic pressure, and filtration (formation of filtrate) exceeds reabsorption at this site (reabsorption occurs later in the renal tubules).
4. Capillaries in active muscles: During muscle activity, the metabolic demands increase, and the capillary filtration (due to increased blood flow and hydrostatic pressure changes) exceeds reabsorption to supply nutrients and remove wastes, and also to facilitate fluid movement for tissue needs.

Answer:

C. Glomeruli in the kidneys, D. Capillaries in active muscles