Which of the following statements about the effect of surface are6n fn f d-nso.c*-3lsza and volume on the cell’s processes 6 z-snsf3.f*n- l docnis false?

  Which statement best dez9jpn2 p *ic7escribes stem cells?

  Which is a correct description of the cell type adapted for gas exchange i,hvxy e q0)p -9bz 6sa;l6aguyn the lungs6e6 uy pzx-; yl,9agq)bhs0a v?

  Which of the following explains the limitations on cellm1/ nkus srnm t,,+ub-y0 ww2k size?

  What is this cell's most likely primary function, and where could it be locatmdrhu967 dn6 8 c1wjneed in a m17en u8nc6mj6w9 rddhammal?

  Which of the following characteristics of type I pneumocytes contri3t. ijd9p7vmdx r8mk1bute to increasing the rate 391 8pxmdk 7.itjvmdrof 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 old. One of/odjt2w 4na a9v+np/k the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient r4d2aatj9k//vnow +n p eceived?

  Based on the Venn diagram, which identifies cardiac muscle cells aw4uhkdfticg f2n9a01 p: /7jlnd striated muscle dck/g0:4hf2u pln f7jwti 9a 1fibres?

Below is a diagram of a motokcf* (kt d,z0hc x+ 50ygpkw qp(htc0/r neuron. Neurons are the longest cells in the human b dp wq0,h(kgxcy/5tck*t 0pch0k z+(fody.
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 sy;u:jult:3 tf1r vnh*jndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli.;jv u:rhnt j1 fu3l:t* 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 vxa/t :k:zvp89u. s-;mz yywonot used in the trev8 am ywtpzk-zxvy/ 9.s:u;:oatment of leukaemia?

  The table shows the diameters of red blood cel /4w 88(bbebcot vo9*k. oya9yf fgvi7ls from different organisms. Which red blood cell will have the highvw 9*/7v o .y kytc48ageo8 obf(f9ibbest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal co,i* -w; plwfysnvoluted tubule make these cells more adapted to the functions they pyw i-wfl*;s, 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 embryonics 6:r hm)+-k, *bph4htojsie m stem cells and specialised cells is/are not truehs:hmi p6+ mr*tk4sbe ,-jho)?

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 ord* okjc5ptyfae(w(/ o-3ypw l9er from smallest to largest?j3(p p(5lf weoyo/*cw9y k- ta

  Which row in the following table gives the correct disadvantages of the differen:rkrl(, tqia/vzx-a s,1 b4qwp z. z:st stem cell sour:trab: z i .zsqrzk(q4a vxlpws,1,/-ces for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type I d evy(8w,)zu jg;aywb bfb.(q(iabetes in the future. 8v.bjq(uw,y )febw( by;(az g

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 to scaui3a10tr * zglle).

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

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