Which molecule is secreted from the peritubular capillary network into the convoluted tubules?Multiple ChoicewatersaltH+nutrientsplasma proteins

Break Down the Problem

1. Identify the type of molecules typically secreted from the peritubular capillary network into the convoluted tubules.
2. Consider the functions of the identified compounds in renal physiology.

Relevant Concepts

1. The peritubular capillaries are involved in the process of secretion and reabsorption in the nephron, particularly in the proximal and distal convoluted tubules.
2. Common substances that are secreted include H+, certain ions, and nutrients.

Analysis and Detail

1. Water: While water is reabsorbed in different parts of the nephron, it is not actively secreted into the tubules from peritubular capillaries.
2. Salt: Like water, salts can be both reabsorbed and secreted but are typically reabsorbed rather than released into the tubules from the capillaries.
3. H+: The secretion of hydrogen ions (H+) into the renal tubules is an essential process for maintaining acid-base balance.
4. Nutrients: Glucose and amino acids may be reabsorbed from the tubular fluid back into the bloodstream but are not secreted into the tubules.
5. Plasma proteins: These are generally too large to cross the capillary endothelium and are not secreted into the tubules.

Verify and Summarize

The main molecule secreted from the peritubular capillary network into the convoluted tubules is H+, which plays a critical role in regulating the body's acid-base balance.

Final Answer

H+ is the molecule secreted from the peritubular capillary network into the convoluted tubules.