Digestion and how nutrients reach the blood
Grade 9 Science Worksheet - Challenge Me
Circle the best answer.
Read this first
Use this
Model starch test (model data), 3 rows. Columns: minute, tube 1 amylase, near-neutral, tube 2 amylase with acid, tube 3 water only. 0, 100, 100, 100. 10, 30, 100, 100. 20, 5, 100, 100. Starch left is in relative units. Tube 2 has the acid level of the stomach.
Ari reads a model card with three tubes. What does it show about amylase in stomach acid?
- Acid sped up the amylase, since tube 2 lost the most starch
- Acid stopped the amylase, since tube 2 stays at 100 like tube 3
- The three tubes lost starch, with tube 1 losing the most
- The amylase in tube 1 was used up by minute 20, so its starch fell to 5
The 8.1 and 0.9 were worked out from 9 and 90 percent. Bo reads the water card. Which statement does it support?
- The small intestine absorbs the full 9 L, so no water reaches the large intestine
- The small intestine absorbs about 0.9 L, leaving about 8.1 L for the large intestine
- The small intestine absorbs about 8.1 L of the 9 L, leaving about 0.9 L
- The small intestine absorbs about 9 L, and the large intestine adds 0.9 L back
Villus route card (real data from OpenStax Anatomy and Physiology 2e)
product made from enters next stop glucose starch blood capillary hepatic portal vein to the liver amino acids protein blood capillary hepatic portal vein to the liver fatty acids and monoglycerides fat lacteal lymph vessels to the blood Esme reads the route card for a lunch of bread, beans and nuts. Which statement matches it?
- Glucose and amino acids enter capillaries; fat products enter the lacteal
- The three products enter the blood capillaries and go on to the liver
- Amino acids enter the lacteal, while fat products enter the blood capillaries
- Glucose and fat products both enter the lacteal, then travel in lymph vessels
Kira reads the model. How much glucose does the flat strip take up in a minute, and how does that compare with the folded strip?
- 30 units a minute, the area of the flat strip without the rate
- 180 units a minute, three times the folded strip's 60
- 60 units a minute, the same as the folded strip
- 60 units a minute, one third of the folded strip's 180
Use this
Notebook (model data), 4 rows. Columns: line, what it says. 1, Chewing breaks the bread into smaller pieces. 2, Salivary amylase starts changing starch into maltose. 3, In the stomach, pepsin finishes digesting the starch. 4, In the small intestine, pancreatic amylase continues the starch breakdown.
Milo reviews a notebook on digesting bread. Exactly one line is wrong. Which line, and why?
- Line 2, because the mouth just chews and starts no digestion
- Line 3, because pepsin digests protein, not starch
- Line 4, because amylase was used up in the mouth and cannot work again
- Line 1, because chewing is chemical digestion
Notebook (model data)
line what it says 1 Most absorption happens in the small intestine 2 Each villus holds capillaries and a lacteal 3 Sugars and amino acids enter the lacteal 4 The large intestine takes back water Noah reviews a notebook on absorption. Exactly one line is wrong. Which line, and why?
- Line 1, because the stomach absorbs most nutrients
- Line 3, because sugars and amino acids enter blood capillaries
- Line 2, because a lacteal is found in the stomach wall
- Line 4, because the large intestine absorbs most nutrients, not water
Use this
Notebook (model data), 4 rows. Columns: line, what it says. 1, Amylase breaks starch into sugars. 2, Pepsin breaks protein into smaller peptides. 3, After it breaks one starch chain, an amylase molecule is used up. 4, Lipase breaks fats into fatty acids and monoglycerides.
Pia reviews a notebook on enzymes. Exactly one line is wrong. Which line, and why?
- Line 3, because an enzyme comes out unchanged and works again
- Line 1, because amylase breaks down the protein in beans and eggs
- Line 4, because lipase makes amino acids from the protein in food
- Line 2, because pepsin, like amylase, also digests starch in bread
Organ card (real data from OpenStax)
organ main job Stomach churns food and starts protein digestion with pepsin Small intestine finishes digestion and absorbs nearly all nutrients through villi Large intestine takes back water and salts and has no villi Ren compares three organs on a card. Which statement matches it?
- The stomach absorbs most nutrients, after pepsin starts the protein digestion there
- The large intestine absorbs most nutrients, through the many villi in its long wall
- The small intestine absorbs nearly all nutrients; the large one takes back water
- The small intestine takes back water, and the large intestine finishes the digestion
Enzyme card (real data from OpenStax)
enzyme made by works in breaks starch into Salivary amylase salivary glands mouth maltose Pancreatic amylase pancreas small intestine maltose Tala compares two enzymes on a card. Which statement is correct?
- Salivary amylase digests starch, protein and fat, while pancreatic amylase digests starch
- Pancreatic amylase is the same amylase carried down from the mouth
- Both make maltose from starch; one works in the mouth, one in the small intestine
- Salivary amylase works in the small intestine, and pancreatic amylase in the mouth
Absorption card (real data from OpenStax Anatomy and Physiology 2e)
nutrient share absorbed in the small intestine (percent) protein 95 to 98 fats about 95 water about 90 Zee reads the absorption card. Which statement fits it?
- The stomach takes in about 95 to 98 percent of the protein
- The small intestine takes in about 90 percent of water and 95 percent of fats
- The large intestine takes in about 95 percent of the fats and 90 percent of the water
- The small intestine takes in about 95 percent of the water and 90 percent of the fats