Which of the following statements about the effect of surface area a u(0*prihqat4 t,lgi) h3k4 /zp6bxfp nd volume on the cell’s processep6r, abulhitp 0)i gz4f4qht3/xkp* ( s is false?

  Which statement best describes s;bb 9v:e 2emlwa1b,jh tem cells?

  Which is a correct description of the cell type adcz-t/* b1b lars 9a o)yte0kz;apted for gas exchange in the lungs?0;1aylt eborbzast-k)*9 /zc

  Which of the following explains t p)he dtk:z3v,he limitations on cell size?

  What is this cell's most likely pr oa6yj1h.mj- oimary function, and where could it be located in a mammal? ojh -my ao.j16

  Which of the following characteristics kpra *e*. t o1-xgje; ga kdjo5:dm+)f) +zyaeof type I pneumocytes contribute to increaktxo mfp.;+ dggaje51 )z+y rd oaaj:*)* kee-sing the rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplj cfoswu.m8v 5 k6ht7zo6/ou +ant from a 36 year old. One of the funct /8oz6+k.5uo7om6tvfhjsucw ions of these cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle celw fab/4t5u (.faf6h;quvjpxa0; 5hw m ls and striated muscle fibresaq f6.0humwwfa hub5/ ;v; fxj p45a(t?

Below is a diagram of at e2azvnlwal3p4m7 j:fq/o0/7i mai 0 motor neuron. Neurons are the longest cells in the human body. q7m0/wmvl7iiza4 f/ :3e j0ao pntla2
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory distress syn 9l wt0mr c/ddnguh,)0drome, which could be caused by a lack of sufficient surfactant innld, utwm) r/09cdg0 h the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic stem cells are not used f/+jnyqx*k/cjd; k (sin the treatment of leuk xj dj+nyc/*f/k; qks(aemia?

  The table shows the diameters of red blood cells from different organisssup8: s; xy*fx :4 wz5di1kgrms. Which red blood cell will have the highest surface area to volume ratywr ik: *8;u: 4ssxx1dp g5zsfio?

1.Explain how the shape of erythrocytes and cells lining the proximal convolutedhspr ze-pq3 65hs+r; a tub hhrp+35- zsrea;pq 6sule make these cells more adapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells and specias25/af5r e 6.a xinkfrlised cells is/are not true.65x raefs5nf/ ka2ri ?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of 7)6ji goggg+*kng vvq pcr 667the following is the correct order from smallest to largest?66 i* og7vqvcr6g 7k)ngp+g gj

  Which row in the followingfw6p* a1ux r+th0c ac4 table gives the correct disadvantages of the different stem cell sources for therapeut0 c+ h14u*wp taf6crxaic uses?

1.Describe how the use of stem cells may be usus+x1l1dvw))e t3 ai bed to treat type I diabetes in the future.ut 1slvea w)b3i dx1)+

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells (not to scale). o5cm 5j nh5vll;8ei(t

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.