Which of the following statements about the effect of suo +,+qgsq .9s+d7tjybm lzj7 prface area and volume on the cell’s processes o g7qp7qjz+ b9s.l+tm dysj,+is false?

  Which statement best describes sgysqfq-1l- , js. gz*item cells?

  Which is a correct description of the cell ty-4k0idk;,s 0v w z.osojt5db jpe adapted for gas exchange in the lun,sktv 5o0 wzdob4kjd0;i-js.gs?

  Which of the following explains the l jnt:z:e/a-v / gs1keaimitations on cell size?

  What is this cell's most likely primaojqq bd2w9.b e 3y:s.v rln3g-vnz7)ery function, and where could it be located in a mammalwndel)b 2bs nj :.3o9vry.-qq7 g v3ez?

  Which of the following characterist;tgrv2r*v c j2q;l hdc/pn63mics of type I pneumocytes contribute to increasing the rate of gas exchangepc2;rjgh tlcn2 q36*rmdvv ;/?
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 old. One 0m7rky1kq -yk of the functions of these cells is to produce red and white bloor1-ky y0kmkq7 d cells. What type of stem cells has the patient received?

  Based on the Venn diagram, wh1/22uri io(rq;lg ryhz)3le f ich identifies cardiac muscle cells and striated muscle fibres?eury2ifo l) /1g ql2rzih(3;r

Below is a diagram of a motor neuron. Neurons are the longest cells in pfra32vr/ uf(- (lynzthe humanl(32/ nyfzr-uvpf ra ( body.
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 syndrom6 ifdiv(a2q/xj j ,dd,e, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoddi,,6vi2 dqf/ajx j(li 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 x7p0 d vodtj2s s:wt;*embryonic stem cells are not used in the2 spdjwo0tt:;*vdx7 s treatment of leukaemia?

  The table shows the diameters of red blood cells from dx+jfkaf; 3ze*nb;+t bj .c/ * ,zzyasiifferent organisms. Whichia ce b;b3zy,*k a/n+j.s;xt zfjzf+* red blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal convoluted5n*kvm djcg;/c 8m(r d tubule make th;gknc8m rd (*mdvc5/j ese 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 ste 8k,6fsw mpe.42unzfk m cells and specialised cells is/are not trueu6p2,ffenm .z4w k8 sk?

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 th(9yvua( n7yask(fh 3gs /nt ;je correct order from smallest to largest?taa(n y9(fyss7hu(3k;gn/ j v

  Which row in the following table gives the cogjed g ;:guy3 ls+sa,o5k6-n euul4 4ny:2fs jrrect disadvantages of the different stem cell ee4y: 5o6j ydsgk an :sn4 +3 u;fl,jgug2-sulsources for therapeutic uses?

1.Describe how the use t qdhglxn0h6qr q. +-1of stem cells may be used to treat type I diabetes in the fut +nq.qqgx ht- l06r1hdure.

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 tmr x8ip viu.4 h-wz*4po 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.