How Did the Development of the Saddle Contribute Positively to the Growth

question 51

Multiple Choice

How did the development of the saddle contribute positively to the growth of trans-Saharan trade?

• A) It enabled the Berbers to dominate the desert.
• B) It increased the speed of the caravan trade.
• C) It enabled merchants to cross the desert safely.
• D) Its creation made animals useful for the first time in the trans-Saharan caravan trade.

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Definitions:

Antidiuretic Hormone

A hormone released by the pituitary gland that regulates water retention in the body by increasing the concentration of solutes in the blood.

Collecting Ducts

Tubules in the kidneys that receive urine from the nephrons and transport it into the renal pelvis and ureter.

Reabsorbed

The process by which substances are taken back into the blood from the filtrate produced in the kidneys.

Concentration Gradient

A variation in the concentration of a substance across a distance; a key factor in diffusion processes.