Which of the following statements about the effect of j2qfn8 y tsv2 f l(;qs)uay4/usurface area and volume on the cell’s processes isy/l u 2fujs; (vq8fn)4sy q2at false?

  Which statement best describx+uw ;e4.dvmz es stem cells?

  Which is a correct description of the cell type adapted forupvu3h4 v9pinb,8l5i0u 5fl gb)1ash gas exchange in the lungsupl)4g31uafv9 isl,n 8 b0 puih 5bhv5?

  Which of the following explains the l h9iktf4t ;+yvip0mpj1*9zygimitations on cell size?

  What is this cell's most likely primary function, and where could lxn k w35 /51/ t.49oyznmwmbib,wzeu it be located in auoby/ /w4 t lm9nxb5 3,ez5wzi1m.kwn mammal?

  Which of the following characteristicdpcen+b/l.4 e4z yqc3 s of type I pneumocytes contribute to increasing the rate /+pzel.4yc4b3 cnd eq 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 trans8xb( r c sxs)m70mkk3eplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient received?3eb) (0xk srsmxcm7k 8

  Based on the Venn diagram, which idet )5wswf;:mjxntifies cardiac muscle cells and striated muscle fibrs; w:wj5ft) xmes?

Below is a diagram of a motop5wt ezaen zcrnfo :8 650cy z/9n*q/dnth 61nr neuron. Neurons are the longest cells in the human body.z0te np1r*: 6ac9zdhnn65tyz/w 8no/cq5fne
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 dis+p-0xf9r m* kn/ry 7yil z)lvhtress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The9-irv)p/mfyr nl +h0yzx7k * l 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 embr6b, 64byzpi 6ucmd,fmyonic stem cells are not used in the treatmmcz46db,pbu6, 6yifm ent of leukaemia?

  The table shows the diameters of red +r,cfq fp6bzi m;mt l-* mr93-.czzjg blood cells from different organisms. Which red blood cell will have the highest surface area to volume ratiog ,zqc*mic6 fb;.zrjl r pzm3-m f-t+9?

1.Explain how the shape of erythrocytes and cells lining the pkypryn i8a rh7t05,1w1vg:iaroximal convoluted tptw rya:8ig7 kynv,ra1 1i0h5ubule 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 specialnw74fag.d: mi+unm w-ised cells is/are not tru4dnm.wnwgmf7- aui: +e?

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 the following is the correct order from sma5ai6;oex tf;1q +i3;kzv frce llest to largest?az3o1k ; vir ixctfe6e+5;;fq

  Which row in the following table gives the correct disadvantages of the .6x yte mmds*h m(wa,0different stem cell sources for therapmw0hmdy.*(, tmxa6e s eutic uses?

1.Describe how the use of stem cells may be used to treat type (ufi-isxz ) xe2co +1hI diabetes in the futur)csi -ox2+ize1x(fuhe.

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 specialisehxyfwp 3-i1g8d cells (not to scale).

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

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