Which of the followin5xbxds) ,)z9x9, j)ep m xbc+ydqrccve ,f b),g statements about the effect of surface area and volume on the cell’s processes is fqcbx c mb, d,,)e)prdy9z xf5j)b x+v,)esxc9 alse?

  Which statement best describes stem ce.3z; firtddanm7za6h)50;re mhzz:c lls?

  Which is a correct descrip2xvrow g t+ ;ujun*pg.;90sdhtion of the cell type adapted for gas exchange in the 0snjuwo r g+;vx h p.2tg*;u9dlungs?

  Which of the following expgk qfu 8ffgy.c,t /g*,hro/.r7yij)vlains the limitations on cell size?

  What is this cell's most likely primary rv3a n)iqnp04g ib/ k9function, and where could it be located in a3 9 /0rqka pgbnii)v4n mammal?

  Which of the following char6 /auhsi4bkkh:m /ukks q30wj8/2wu m acteristics of type I pneumocytes contribute to increasi0/qhkja8w36iwkb m/s mk:us u/2u hk4ng 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 transplant from a 36 year;yepz7fs r ;cv 3)akb hu(jia1r. nt21 old. One of the functions of these cells is to produce red and white blood cells.s;7v(z rbhapk; ce3j1tf21 u.)yinar What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells anh0goz ;an:w9b*u z(ysd striated muscl zg huoz b*(say:w90n;e fibres?

Below is a diagram of a motor neui1y 8d nyks2 (g y(ilx mnfx6);uo0e3rron. Neurons are the longest cells in the human body. ikrun )g6l(8o3m0 s(nxe 2y i ;yydf1x
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 d)dwx oda*d4z1 istress syndrome, which could be caused by a lack of suf)1azx4do* wd dficient surfactant in 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 in the 7bn ymv8zdpud;wt9 5, treatment of leukaeb;p 5 wvd yd,zumt7n89mia?

  The table shows the diameters of red rl4:tgz 5fd3ej oey2p )3wu3eblood cells from different organisms. Which red blood cell will have the highest p2 )e4lre 3euoj:wz t f3gd5y3surface area to volume ratio?

1.Explain how the shape of erythrocytes aw8 -5;u ytypo wtjw5sup 6.,yutu3 y0tnd cells lining the proximal convoluted tubule m;twyw uyt053ut osy6j8p-t5, .upu ywake 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 specialised cells is/a+ yigkd */ w;fjdcsthi6:g 0e/re not true? t idj+ /wgk ;dfeh:y6s0i/ g*c

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 folrt9y z 3i1ilp/lowing is the correct order from smallest to largest?y3 l pz9irt1/i

  Which row in the following table gives 0b 4, sx8odl,z a/;s bap-pcoythe correct disadvantages of the different stem cell sources for therapeutic usy;-ap4 p, z/ bda0xsocob,l8ses?

1.Describe how the use of stem cells may bepqty 2 7mz+6qu used to treat type I diabetes in the futuq zt2mq7pu+6 yre.

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 cjn zhgcr:4g y5hu:1 3dells (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.