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Food is mechanically broken down in the mouth and chemically digested in the stomach. How do these processes work together?

• Both processes break down proteins only

• Mechanical processing produces digestive enzymes

• Chemical digestion helps chew the food into smaller pieces

• Mechanical processing increases the surface area for chemical digestion

How are the structure and function of the small intestine related to its role as the main site of nutrient absorption?

• It contains only smooth muscle

• It receives bile from the pancreas

• It is the first organ where food enters

• It has a large surface area due to villi and microvilli

In digestion, food is moved and mixed through the digestive tract by muscular contraction. Which statement best explains the relationship between peristalsis and digestion?

• Peristalsis only happens in the stomach

• Peristalsis produces enzymes for digestion

• Peristalsis breaks down nutrients chemically

• Peristalsis is a mechanical process that moves food, enabling enzymes to act on it.

If a person's stomach lining is damaged, which processes are most likely affected?

• Elimination and peristalsis

• Absorption of water and elimination

• Mechanical digestion and absorption in the mouth

• Secretion of digestive enzymes and chemical digestion

Which best describes how the Digestive System and Excretory System work together to maintain the body's balance?

• Digestive System stores water; Excretory System digests minerals

• Digestive System breaks down food; Excretory System removes waste

• Digestive System produces hormones; Excretory System absorbs vitamins

• Digestive System absorbs oxygen; Excretory System breaks down proteins

Why is coordination between these systems important for homeostasis?

• It increases muscle mass

• It changes waste into proteins

• It stores extra fats for later use

• It ensures nutrients are absorbed and wastes are removed

During prolonged dehydration, both the digestive and excretory systems adjust their functions. Which statement best describes this adjustment?

• The small intestine stops absorbing nutrients, and the bladder stores extra water.

• The stomach stores more food for later digestion, and the kidneys stop filtering waste.

• The large intestine increases mechanical digestion, and the kidneys produce excess urine to remove salts.

• The large intestine absorbs more water from undigested food, and the kidneys conserve water by producing concentrated urine.

Plants have different organs that perform specific functions to help them survive. Each organ contributes to the survival, yet one is mainly responsible for absorbing water and minerals. Which plant organ plays this role?

• Flower- attracts pollinators

• Leaf - produces food

• Root - anchors the plant in the soil

• Stem - provides structural support

Plants have specialized tissues that transport substances to keep them alive. These tissues are found in specific plant organs. Which plant organ contains xylem and phloem for transporting water, minerals, and food throughout the plant?

• A. Flower - contains vascular traces that supply water and food to petals and reproductive structures

• Leaf - has veins with xylem and phloem that distribute water and sugars within the leaf blades

• Root - contains vascular tissues that absorb water and minerals and send them upward to the plant

• Stem - contains continuous vascular bundles that serve as the main passageway for long-distance transport

In the plant transport system, which part produces food through photosynthesis?

• A. Flower - attracts pollinators

• Leaf - contains chloroplasts with chlorophyll

• Root - anchors the plant in the soil

• Stem - supports the plant