Which of the following statements about the effect of surface area anbo ,1d0s33i;k(h ms8mlw komad volume on the cell’s processes is fa3 0m8l,ih3ms(bmow ok adk; 1slse?

  Which statement best describesymga98phfxe 0(e4 cawf5j;i* stem cells?

  Which is a correct description of the cell type adapted for dw kfytdk j,+5q 6z43ugas exchange in the lungsj zyf346uw d dtk5kq+,?

  Which of the following explains the limitationzg,8*r9mzix i6 lcg h9+1vssxs on cell size?

  What is this cell's most likely primary function, and where could it be locatec a/t tf90 95q,ktzlht )yvqa3d in a mamma,/htq3ykf)t9lz q5v ata09t cl?

  Which of the following characteristics of type I pneumocytes contribute to a0m2ywxu k* v o0k7wuc,mg x0d2;l-qsincreasing the rate of gas 0yl2vku2 owmx*,;kagq us d0m07cwx- 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 3x hxr0vm7-*cd 6 year old. One of the functions of these cells is to produce red and white b7xx-vd 0chm *rlood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which id )*o-tqpbe4taentifies cardiac muscle cells and striated muscle fip-) a*4 teqbtobres?

Below is a diagram of a motor nefj.jaon +acr pg20+m+wf: h y1uron. Neurons are the longest cells in the human bodya a2f c:m0.w1f+ygrjpjh+ o +n.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies somfr7ffvrjy(p. /8. gjdetimes suffer from infant respiratory distress syndrome, which could be caused by ( /fpgfr r y.j8fd.j7va lack of sufficient 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 sjjx383fmko s- tem cells are not used in the treatment of leuko8jx m sj-kf33aemia?

  The table shows the diameters of red blood cells from diffk:d 2v+c1 epz:ic* v e(jyt1bderent organisms. Which red blood ce(12vky1dzbdv +jcc ie*tp :e:ll will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lij i; ,h8qfjvo:q )5k0:tncbfyning the proximal convoluted tubule make these cells more adapted to the functio5h8 :in ftfcq j,o:;) kvqjyb0ns 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 sp t x(3h5qvl3sdss++kwy:ssv.ecialised cells is/are not true vdx(h:kts5+ s+lss3swyvq 3.?

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 isnlf95lm 3 h6um the correct order from smallest to largest? m39m h6ll5fnu

  Which row in the follo ce qf4azd+f;b2*sf c6+7hkci wing table gives the correct disadvantages of the different stem cell sources for thf42af q sc;*6h7c+fz ie dck+berapeutic uses?

1.Describe how the use of stem cyigg-o;jo ;0a2:lrq cy-qk 2 dqal72zells may be used to treat type I diabetes in the future. loyyr :aqdq2-ci; l;aq-z0 g7g2j2ko

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 .vvs5y09x2y2xffh el(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.