Tissues, organs and organ systemsIB MYP Biology: Subtopic test

1. 1
   The human stomach is an organ. Its wall contains muscle tissue that churns the food, glandular tissue that makes digestive juices, and epithelial tissue that covers the inside and outside surfaces.

   (a)

   What is a tissue?

   [1 mark]

   • AA group of similar cells that work together to do a job
   • BA group of different organs that work together
   • CA single cell with a special structure
   • DA group of different tissues forming one structure

   (b)

   Which tissue in the stomach wall makes the digestive juices?

   [1 mark]

   • AMuscular tissue
   • BEpithelial tissue
   • CGlandular tissue
   • DXylem tissue

   (c)

   Explain why the stomach is classed as an organ rather than a tissue.

   [2 marks]

   Total for question 1: 4 marks

2. 2
   A student is making a revision poster about the human circulatory system. It includes the heart, the blood vessels and the blood, which together carry oxygen, nutrients and waste around the body.

   (a)

   Which of these is an organ?

   [1 mark]

   • AA red blood cell
   • BThe heart
   • CThe blood
   • DThe whole circulatory system

   (b)

   Which two organ systems work together to deliver oxygen to the muscles?

   [1 mark]

   • AThe digestive and nervous systems
   • BThe digestive and circulatory systems
   • CThe nervous and respiratory systems
   • DThe respiratory and circulatory systems

   (c)

   Describe the function of the circulatory system and of the respiratory system.

   [2 marks]

   Total for question 2: 4 marks

3. 3
   A student wants to find out how fast water moves up a plant stem. She places identical celery stalks, each with leaves at the top, in beakers of water containing red food dye. She removes one stalk after 1 hour, one after 2 hours and one after 3 hours, and cuts across each stalk to look for the dye.

   (a)

   State a testable hypothesis for the investigation, with a scientific reason, and identify the independent variable.

   [3 marks]

   (b)

   Describe how the student could measure the results, identifying the dependent variable and two control variables.

   [4 marks]

   Total for question 3: 7 marks

4. 4
   A patient has a diseased small intestine that can no longer absorb nutrients properly. Doctors are considering a transplant of a small intestine from a donor. Transplants carry risks: the patient's body may reject the donated organ, so the patient must take medicines for life that weaken the immune system. Donor organs are also in short supply.

   (a)

   Using the small intestine as an example, explain how cells, tissues, organs and organ systems work together to supply the body's cells with nutrients.

   [6 marks]

   (b)

   Discuss whether doctors should carry out a small intestine transplant for this patient.

   [6 marks]

   Total for question 4: 12 marks

End of questions