Which of the following statements about t39ls(;m nhjbhhe effect of surface area and volume on the cell’s processes is 3mj(nsh;hb9 l false?

  Which statement best -2-nhf;vvm2ogtsaj 8, gyc*m describes stem cells?

  Which is a correct description of the cell type adapted for gas exchange 99n (lu,z0n;f hkvqpa in the l 0(qnnlfh;ku9 va9z,pungs?

  Which of the following expla t/** xqxm4pknins the limitations on cell size?

  What is this cell's most likely primary function, and where edeoh4c3bo* 17/es olcould it be located in a *ce oobh /3l7d4so1eemammal?

  Which of the following chy** ) psj;dnv (7b jqpp 6yke)79bzgozaracteristics of type I pneumocytes contribute to increasing j7*(zb)yqz79 kgs6 b oed)n* vpp j;ypthe 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 marro+ b.s8 of6wvt)t lby3pw transplant 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 f8.yl3wpt6svb)t +obreceived?

  Based on the Venn diagram, which identifies cardiac muscle cells and szx,,4yxsib 1mh) q: mltriated musx ybhl1 i4:mz,xq), mscle fibres?

Below is a diagram of a motor neuron. Ne9v ,se:pdvd0dd*h1e vurons are the longest cells in the human9s1e vde d*d:, dph0vv body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes sufyk(kz y(e3+l gfer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant i 3eg( kl+kz(yyn 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 kz 72+ s,la0q)qh8q:l xbzzms in the treatmslxq) b27m8z+,sah qz0qk z:lent of leukaemia?

  The table shows the diameters of red blood miv 3hdkd0al8b yc17bo/5bz. cells from different organisms. Which red blood cell will have the highest surface area to voldb 1 5.38kh/o7v ic mdybblza0ume ratio?

1.Explain how the shape of erythrocytes and cells lining the proi/0lp19d5 j7 oj/ayluxa owqcjtzo/,s 49j1 k ximal convoluted tubule make these cells more adapted to the functions th0y1s 7j49,j /xoijlo/1k ulo9zda/a q p c5tjwey 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 em0o xkvz6xl5g jqx ix;r pca.f6-d. l/8s5ar* rbryonic stem cells and specialised cells is/are not true? oc*8r66ir a .p/g;0l klf55 xvxdjrzq- sxx.a

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 ordiulxi u*l ,r5,8mbq;cer from smallest to largest?r ;b, u,q8x*im5uilcl

  Which row in the following tabla0+fin /6zv zprs vmd)c9 y/x,t sz8x:e gives the correct disadvantages of the different stem cell sources for d: imr+p /ss n/x9z6v8zyzcav0,)xft therapeutic uses?

1.Describe how the use of stem cells ma3r; o*+cw lwpqy be used to treat type I diabetes in the futu;l 3o*rw+w pcqre.

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 (ntw +ex0w7pr61 fl8u 6exr.gijw)8lle ot 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.