Which of the following statements about the effect ,s :e:nkrv ,zs0savl,of surface area and volume on the cell’s processes is faln: s :r,,,zlskvvs e0ase?

  Which statement best 8p e0 aik*: hw4 ic, )pdugqz.b9n1sizdescribes stem cells?

  Which is a correct description of/cc1a zc t6cw- the cell type adapted for gas exchange in the lungaw- zc6c ctc/1s?

  Which of the following explains the zr*u2i 2 l;erhlimitations on cell size?

  What is this cell's most likely primary1-jh8eebi n*l function, and where could it be located in a mammal? lh-8 ebejn*1i

  Which of the following charago/2lz36 ckkv+ytc w )cteristics of type I pneumocytes contribute to increasing 2ky36l+cwzg ovk/c t) 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 old. One of the funct wu rwx.4h08z8mbn da1ions of these cells is to produce red and white blood cells. What type 8wdm1 au.rw08b 4h xnzof stem cells has the patient received?

  Based on the Venn diagram, which identifd:v;d8 5xaus yies cardiac muscle cells and striated muscle fibry8 d:v5;axsd ues?

Below is a diagram of a motor neuron. Neurons are the longest cells in t aiu)mg t3w id,ocoy3 /hi;r3*he human iic t3 /ag3orm3id ;)oh* uy,wbody.
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 syndov9 dse46ma v1rome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli strucvs64edo a 9vm1tures.


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 that83 kjqhco ;)bv embryonic stem cells are not used in theq8bo v c;)h3kj treatment of leukaemia?

  The table shows the diameters of red blood cells from dy;rcy(qmt :(, u gza-jfk r82kifferent organisms. Which red blood cell will have the highest surfa:y gq f8yz2a(tk(urkj;- c,mrce area to volume ratio?

1.Explain how the shape of erythrocytes a(vdj74v9d 6q ninhex +nd cells lining the proximal convoluted tubule make tdnvvijnh d 976q4ex+ (hese 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/are notu1gok v+aa k2)w8pc.n true?kg+8cn k )aupwo.2 av1

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 fo7 )i( ax4gaidwkj7+ktkf pk2 0llowing is the correct order from smallest to largest?g(ka7w7ax j fdt 2 0pki)4ik+k

  Which row in the following table gives the correct +5i i.kyv3 cl9n+n)sjm :qqec4 xprb- disadvantages of the different stem cell sources for tq4 c9+jel vni.q +kp5minc:s3br-yx)herapeutic uses?

1.Describe how the uscj jxee.a8qm;8q a r(3*vqxsl z8d18 qe of stem cells may be used to treat type I diabetes in the8x qsza;daec.8(xme 8q8rjjl1* q qv3 future.

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 specifvcyj10ir4q16d*z caalised cells (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.