Tuesday, May 29, 2012
Materials for the Finals
Sunday, March 18, 2012
Blood Transfusion
Dear SDtudents,
As we are learning about blood transfusion, please make sure to practice using the web site: http://nobelprize.org/educational_games/medicine/landsteiner/Nobelprize.org
with the diagrams to learn how to justify for each case of blood transfusion.
As we are learning about blood transfusion, please make sure to practice using the web site: http://nobelprize.org/educational_games/medicine/landsteiner/Nobelprize.org
with the diagrams to learn how to justify for each case of blood transfusion.
Tuesday, February 28, 2012
Test material
Dear students,
You need to review the section about the circulatory system from page 64 until page 72. In addition review all extra notes and sheets that were given.
Do your best
You need to review the section about the circulatory system from page 64 until page 72. In addition review all extra notes and sheets that were given.
Do your best
Wednesday, February 15, 2012
Biology: Digestion and Circulation
Name: ___________Section: 8CPP____ January 2012
Duration: 50 minutes Self Assessment:_______/100
5% for language and presentation
I. Circle the best answer: (16%)
• During which stage does a substance cross a cell membrane to enter the body?
c. Absorption
• Bile is secreted into the ____________________, where it functions in ________________.
b. duodenum _ fat digestion
• Which of the following statements about the role of the large intestine in digestion is false?
b. The large intestine produces digestive enzymes.
• Which of the following statements about digestion in the small intestine is false?
b. Bile is produced in the small intestine.
c. The pancreas secretes enzymes, bicarbonates, and hormones into duodenum.
• The sweetness that you taste if you keep chewing a piece of bread is due to the enzyme
c. amylase
• The vessel that nourishes the heart is the
c. coronary artery
• The flap of tissue that prevents us from chocking is called
a. epiglottis
• Which chamber in the heart is more muscular than the others
c. left ventricle
II. Fill in the blanks with the appropriate term(s) to make the statements correct: (16%)
• A wave of muscle contractions called ___peristalsis______________ pushes food along the digestive tract.
• Many species of _Bacteris______ live in the human large intestine.
• The initial digestion of proteins begins in the ___stomach___.
• ___Enzymes________ are proteins that ____speed up____________ the rate of chemical reactions.
• The regulation of blood sugar levels is accomplished mainly by hormones produced by the _Pancreas_____.
• Contractions of the right ventricle pumps blood into the ___pulmonary artery____________.
• The left and right chambers of the heart are separated by the ____septum__
• The blood coming from the lower part of the body enters the heart through the
__inferior vena cava_________.
III. Answer the following questions: (12%)
Egg white contains a protein called albumen.
A pupil carried out an experiment to investigate the digestion of three identical cubes of cooked egg white using the enzyme pepsin. She set up the experiment as follows: Into beaker A, she put 50 cm3 pepsin solution and a cube of egg white left whole. Into beaker B, she put 50 cm3 pepsin solution and a cube of egg white which had been cut into eight small cubes. Into beaker C, she put 50 cm3 pepsin solution and a cube of egg white which had been cut into sixty four tiny cubes.
She added 1 cm3 hydrochloric acid to each beaker and placed the three beakers in a water bath at 37°C. The table gives the pupil’s observations five hours later.
-
1. What is the function of pepsin?
Pepsin is needed to digest proteins.
2. Why was the cube of egg white which had been cut into sixty four pieces digested most quickly?
This helped increase the surface area to allow more contact with the enzyme pepsin, hence, making digestion faster.
3. How is the above question number (2), related to how villi allow efficient absorption of nutrients in the small intestine?
Having numerous villi also increase surface area to allow efficient absorption of nutrients form small intestine.
4. Describe one other property that helps villi carry out their function.
Villi are only one cell thick which allows diffusion of materials into villi.
Or
Villi are rich in blood vessels which allow transport of nutrients efficiently
IV. What two properties of enzymes are represented in the following figure: (4%)
Enzymes are specific to the substances they work on.
Enzymes can be reused.
V. Label the diagram representing the digestive system: (9%)
1. (2%) Give the function of structure 1
They secrete saliva that is made of water, mucus and amylase
enzyme that helps in the digestion of starch into simpler sugars.
2. (4%) Give two reasons for the presence of acid in the stomach.
- Needed for the enzyme pepsin to work.
- Helps get rid of harmful bacteria
3. (2%) Suggest one purpose of mucus produced in the wall
of the stomach.
To help protect the stomach from the acid produced.
4. (2%) Give one reason why the contents of the duodenum
must not be acidic.
Enzymes produced by the small intestine and pancreas do not work in an acidic media.
5. (3%) What is produced to neutralize the acid? Which organ produces it?
Bicarbonates are produced to neutralize the acid and it is produced by the pancreas.
6. (4%) What does structure 3 produces into the small intestine? Describe its role in digestion.
Structure 3 is the liver, and it produces bile that help in the mechanical digestion of fat. (Emulsifying fat or breaking fats into smaller droplets).
VI. Label the following heart: (10%)
1: ____Aorta_________________________
2: ____Superior vena cava_____________
3. ____Right atrium__________________
4. ____Right Ventricle________________
5. ____Inferior vena cava_____________
6. ____Pulmonary artery___________
7. _____Pulmonary vein_____________
8. ___ Left atrium__________________
9. ____Left Ventricle_________________
10. ____Septum_____________________
1. (4%) Where does the blood that leaves structures (1) and structure (5) go to?
Blood that leaves structure 1 goes to the body.
Blood that leaves structure 5 go to the right atrium.
2. (4%) What is the function of the valves? Indicate the structures that are separated by each valve in the heart.
Valves keep blood flow in one direction to prevent back flow of blood.
Between right atrium and right ventricle
Between right ventricle and pulmonary artery
Between left atrium and left ventricle
Between left ventricle and aorta
3. Indicate using the letters, if the following structures carry oxygenated blood (R) or deoxygenated
blood (B): (3%)
a. aorta: _R_____ b. left atrium: __R____ c. pulmonary artery: _B_____ d. vena caca:___B___
e. right ventricle: _B____ f. pulmonary vein: ___R___
Good Work
Name: ___________Section: 8CPP____ January 2012
Duration: 50 minutes Self Assessment:_______/100
5% for language and presentation
I. Circle the best answer: (16%)
• During which stage does a substance cross a cell membrane to enter the body?
c. Absorption
• Bile is secreted into the ____________________, where it functions in ________________.
b. duodenum _ fat digestion
• Which of the following statements about the role of the large intestine in digestion is false?
b. The large intestine produces digestive enzymes.
• Which of the following statements about digestion in the small intestine is false?
b. Bile is produced in the small intestine.
c. The pancreas secretes enzymes, bicarbonates, and hormones into duodenum.
• The sweetness that you taste if you keep chewing a piece of bread is due to the enzyme
c. amylase
• The vessel that nourishes the heart is the
c. coronary artery
• The flap of tissue that prevents us from chocking is called
a. epiglottis
• Which chamber in the heart is more muscular than the others
c. left ventricle
II. Fill in the blanks with the appropriate term(s) to make the statements correct: (16%)
• A wave of muscle contractions called ___peristalsis______________ pushes food along the digestive tract.
• Many species of _Bacteris______ live in the human large intestine.
• The initial digestion of proteins begins in the ___stomach___.
• ___Enzymes________ are proteins that ____speed up____________ the rate of chemical reactions.
• The regulation of blood sugar levels is accomplished mainly by hormones produced by the _Pancreas_____.
• Contractions of the right ventricle pumps blood into the ___pulmonary artery____________.
• The left and right chambers of the heart are separated by the ____septum__
• The blood coming from the lower part of the body enters the heart through the
__inferior vena cava_________.
III. Answer the following questions: (12%)
Egg white contains a protein called albumen.
A pupil carried out an experiment to investigate the digestion of three identical cubes of cooked egg white using the enzyme pepsin. She set up the experiment as follows: Into beaker A, she put 50 cm3 pepsin solution and a cube of egg white left whole. Into beaker B, she put 50 cm3 pepsin solution and a cube of egg white which had been cut into eight small cubes. Into beaker C, she put 50 cm3 pepsin solution and a cube of egg white which had been cut into sixty four tiny cubes.
She added 1 cm3 hydrochloric acid to each beaker and placed the three beakers in a water bath at 37°C. The table gives the pupil’s observations five hours later.
-
1. What is the function of pepsin?
Pepsin is needed to digest proteins.
2. Why was the cube of egg white which had been cut into sixty four pieces digested most quickly?
This helped increase the surface area to allow more contact with the enzyme pepsin, hence, making digestion faster.
3. How is the above question number (2), related to how villi allow efficient absorption of nutrients in the small intestine?
Having numerous villi also increase surface area to allow efficient absorption of nutrients form small intestine.
4. Describe one other property that helps villi carry out their function.
Villi are only one cell thick which allows diffusion of materials into villi.
Or
Villi are rich in blood vessels which allow transport of nutrients efficiently
IV. What two properties of enzymes are represented in the following figure: (4%)
Enzymes are specific to the substances they work on.
Enzymes can be reused.
V. Label the diagram representing the digestive system: (9%)
1. (2%) Give the function of structure 1
They secrete saliva that is made of water, mucus and amylase
enzyme that helps in the digestion of starch into simpler sugars.
2. (4%) Give two reasons for the presence of acid in the stomach.
- Needed for the enzyme pepsin to work.
- Helps get rid of harmful bacteria
3. (2%) Suggest one purpose of mucus produced in the wall
of the stomach.
To help protect the stomach from the acid produced.
4. (2%) Give one reason why the contents of the duodenum
must not be acidic.
Enzymes produced by the small intestine and pancreas do not work in an acidic media.
5. (3%) What is produced to neutralize the acid? Which organ produces it?
Bicarbonates are produced to neutralize the acid and it is produced by the pancreas.
6. (4%) What does structure 3 produces into the small intestine? Describe its role in digestion.
Structure 3 is the liver, and it produces bile that help in the mechanical digestion of fat. (Emulsifying fat or breaking fats into smaller droplets).
VI. Label the following heart: (10%)
1: ____Aorta_________________________
2: ____Superior vena cava_____________
3. ____Right atrium__________________
4. ____Right Ventricle________________
5. ____Inferior vena cava_____________
6. ____Pulmonary artery___________
7. _____Pulmonary vein_____________
8. ___ Left atrium__________________
9. ____Left Ventricle_________________
10. ____Septum_____________________
1. (4%) Where does the blood that leaves structures (1) and structure (5) go to?
Blood that leaves structure 1 goes to the body.
Blood that leaves structure 5 go to the right atrium.
2. (4%) What is the function of the valves? Indicate the structures that are separated by each valve in the heart.
Valves keep blood flow in one direction to prevent back flow of blood.
Between right atrium and right ventricle
Between right ventricle and pulmonary artery
Between left atrium and left ventricle
Between left ventricle and aorta
3. Indicate using the letters, if the following structures carry oxygenated blood (R) or deoxygenated
blood (B): (3%)
a. aorta: _R_____ b. left atrium: __R____ c. pulmonary artery: _B_____ d. vena caca:___B___
e. right ventricle: _B____ f. pulmonary vein: ___R___
Good Work
Tuesday, January 10, 2012
Review material
Dear student,
We will do a quiz on Thursday, January 12th regarding digestion and will continue revision for the whole chapter as well. Please make sure to review and study well.
Do your best::)
We will do a quiz on Thursday, January 12th regarding digestion and will continue revision for the whole chapter as well. Please make sure to review and study well.
Do your best::)
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