Which System Develops First in the Embryo

question 47

Multiple Choice

Which system develops first in the embryo?

• A) reproductive
• B) circulatory
• C) nervous
• D) respiratory
• E) excretory

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Definitions:

Proximal Tubules

Proximal tubules are part of the nephron in the kidney, responsible for reabsorbing water, ions, and nutrients from the filtrate and returning them to the blood.

Potassium Ions

Positively charged ions (K+) essential for various cellular processes, including nerve transmission, muscle contraction, and maintaining fluid balance within cells.

Ammonium Ions

Positively charged ions (NH4+) derived from ammonia, significant in the nitrogen cycle and plant nutrition.

Secretion

The method through which materials are generated and released from a cell, gland, or organ, serving a specific role within the organism or for the purpose of elimination.