Digestive and Urinary Systems Review

What is the physiological purpose of the digestive system?

• To transport oxygen to the body's cells

• To remove waste products from the bloodstream

• To break down food and absorb nutrients

• To regulate body temperature

What are peristaltic movements and why are they important to the digestive system?

• They are a type of digestive enzyme that breaks down proteins

• They are muscle contractions that help move food through the digestive tract

• They are electrical signals that stimulate hunger

• They are fluids that lubricate the intestines

What is the purpose of the sphincter valves at both ends of the stomach?

• To release hormones into the bloodstream

• To absorb nutrients from the food

• To regulate the passage of food into and out of the stomach

• To produce digestive enzymes

What is the role of enzymes in chemical digestion?

• To provide energy for the digestion process

• To break down macromolecules into their simple components

• To transport nutrients in the bloodstream

• To produce waste products for excretion

What is the functional unit of the Urinary System?

• The bladder

• The urethra

• The nephron

• The kidney

What are the three main renal processes that combine to produce urine?

• Filtration, reabsorption, and secretion

• Digestion, absorption, and excretion

• Ingestion, digestion, and fermentation

• Circulation, respiration, and digestion

How do the hormones ADH and aldosterone, as well as buffers like bicarbonate, regulate the chemical make-up of urine?

• By controlling blood pressure

• By regulating the balance of electrolytes and water

• By stimulating the immune response

• By transporting oxygen to the kidneys

Which part of the human digestive system is primarily involved in the absorption of water?

• Stomach

• Small intestine

• Large intestine

• Esophagus

What role does the liver play in digestion?

• It produces digestive enzymes that break down proteins

• It absorbs nutrients from digested food

• It produces bile to help digest fats

• It stores undigested food until it is expelled

How does the kidney regulate the concentration of plasma and erythrocytes?

• By producing hormones that stimulate bone marrow

• By filtering blood plasma and returning most of the water and solutes to the bloodstream

• By secreting digestive enzymes into the bloodstream

• By absorbing nutrients directly from digested food