Gcse digestion system Q&A with exam guids. This is also containing scientific tips and keywords to allow you to achieve your highest potential in a BIOLOGY gcse exam. maybe even an A level as some of these questions require similar answers.
In this slide you will get to know about nutrition in animals:
What is nutrition and feeding?
Processes involved in nutrition in animals
Nutrition in amoeba, hydra, frog, paramecium, spider, mosquito
Human digestive system- digestion in the mouth, stomach, small intestine, large intestine, assimilation and egestion
Ruminants
In this slide you will get to know about nutrition in animals:
What is nutrition and feeding?
Processes involved in nutrition in animals
Nutrition in amoeba, hydra, frog, paramecium, spider, mosquito
Human digestive system- digestion in the mouth, stomach, small intestine, large intestine, assimilation and egestion
Ruminants
For this assignment, we were instructed to create a powerpoint presentation of at least 12 slides that adequately covered an academic subject of our choice. All sources for media is cited in the work cited at the end of the presentation.
Anatomy of GI Tract with special reference to anatomy and functions of stomach,
( Acid production in the stomach, regulation of acid production through
parasympathetic nervous system, pepsin role in protein digestion) small intestine
and large intestine, anatomy and functions of salivary glands, pancreas and liver,
movements of GIT, digestion and absorption of nutrients and disorders of GIT.
753 Learning OutcomesAfter reading this chapter, .docxpoulterbarbara
75
3
Learning Outcomes
After reading this chapter, you will be able to:
3.1 Describe the processes and organs involved in
digestion.
3.2 Explain how food is propelled through the gas-
trointestinal tract.
3.3 Identify the role of enzymes and other secre-
tions in chemical digestion.
3.4 Describe how digested nutrients are absorbed.
3.5 Explain how hormones and the nervous sys-
tem regulate digestion.
3.6 Explain how absorbed nutrients are trans-
ported throughout the body.
3.7 Discuss the most common digestive disorders.
True or False?
1. Saliva can alter the taste of food. T/F
2. Without mucus, the stomach would digest itself. T/F
3. The major function of bile is to emulsify fats. T/F
4. Acid reflux is caused by gas in the stom-ach. T/F
5. The primary function of the large intes-tine is to absorb water. T/F
6. Feces contain a high amount of bacteria. T/F
7. The lymphatic system transports all nutrients through the body once they’ve been absorbed. T/F
8. Hormones play an important role in digestion. T/F
9. Diarrhea is always caused by bacterial infection. T/F
10. Irritable bowel syndrome is caused by an allergy to gluten. T/F
See page 110 for the answers.
Digestion,
Absorption,
and Transport
M03_BLAK8260_04_SE_C03.indd 75 12/1/17 11:28 PM
76 Chapter 3 | Digestion, Absorption, and Transport
The digestion of food begins even before you take that first bite. Just the sight and smell of homemade apple pie stimulates the release of saliva in
the mouth. The secretion of saliva and other digestive juices starts a cascade of
events that prepares the body for digestion, the chemical and mechanical
processes by which the body breaks food down into individual nutrient
molecules ready for absorption. Food components that aren’t absorbed are
excreted as waste (feces) by elimination. Although these are complex
processes, they go largely unnoticed. You consciously chew and swallow the
pie, but you don’t feel the release of chemicals or the muscular contractions
that cause it to be digested or the absorption of nutrient molecules through
the intestinal lining cells. In fact, you may be unaware of the entire process
until about 48 hours after eating, when the body is ready to eliminate waste.
In this chapter, we explore the processes of digestion, absorption, and
elimination, the organs involved, and the other biological mechanisms that
regulate our bodies’ processing of food and nutrients. We also discuss the causes
and treatments of some common gastrointestinal conditions and disorders.
What Are the Processes and Organs
Involved in Digestion?
LO 3.1 Describe the processes and organs involved in digestion.
Digestion, absorption, and elimination occur in the gastrointestinal (GI) tract, a mus-
cular tube approximately 20–24 feet long in an adult. Stretched vertically, the tube would
be about as high as a two-story building. It provides a barrier between the food within the
lumen (the hollow .
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Gcse digestion system Q&A with exam guids
1. Two important GCSE biology questions with
their answers on the topic the digestion
system.
By:
dreamyalyaa
2. Question 1: what happens to
the food you eat?
Might be
more depending
on the exam
board
5
Marks in
exam.
3. Answer:
Simply, since the food has entered the mouth it starts a
process called DIGESTION that involves many organs
in your body to make that process successfully. The
importance of digesting food eaten is that
using/through the digesting system/process your body
can get rid of harmful and un needed substances,
besides taking up on all the beneficial minerals and
substances e.g. vitamins...
4. Question 2: Explain what
happens to the food from the
time it enters mouth to the
time the waste leaves your
anus.
10 marks
In exam
Might be
more depending
on the exam
board
5. Answer:
First of all, the food you eat enters the mouth, and
after that (while chewing the food and grinding it
using your teeth) a solution/ mouth produced liquid
known as saliva produced by the saliva glands. The
saliva helps to break down the food you are chewing,
and makes sure that the Bolus (when your tongue
turns the food into a ball.) to go down your Gullet or
scientifically esophagus (the tube in which food is
transported) easily!
To be
continued
6. Then the food arrives to your Stomach and it produces acids to
mix with food helping the food to break down even more than it
is! A main acid that is used in this part of the process is called '
gastric acid'. This also helps to kill bacteria and other germs that
could have got into the food. Once the stomach finds itself
finished the food enters the duodenum( following it the
jejunium and the ileum.). In the small intestine, bile (produced
in the liver and stored in the gall bladder), pancreatic enzymes,
and other digestive enzymes produced by the inner wall of the
small intestine help in the breakdown of food. After passing
through the small intestine, food passes into the large intestine.
In the large intestine, some of the water are removed from the
food. it is a real fact that the bacteria located in the large
intestines help the digestion process. However, in the large
intestines food would travel upwards until reaching the end of
the large intestines.
7. Now, the mineral's and substances of the food would
be also sent to the liver to work through the substances
and identify which ones should be kept and which
should be released out. The liver works an important
role as it cleans after the part before the very end of the
digestion system and shares around the body the good
minerals such as vitamins.
•Finally, waste is then stored/kept in the Rectum until it is excreted out of the body by the Anus.
End of Question’s two answer.
If you write this long with this kind of
effort in both question, you’ll surely get
full marks!!!!
