Which of the following statements about th t;mo,/ gu0krqe effect of surface area and volume onoq,k0u;mt/g r the cell’s processes is false?

  Which statement best describes stemk,wdme5ltow tolen* p6*u 3.y1lv.s; cells?

  Which is a correct descriptionr9q(* iay,paq ,et )a(xn1w op of the cell type adapted for gas exchange in the lungs?1,*aeqt(),ao iayw(9n qpp xr

  Which of the following explains yn(wlt8,dg8h zm eb:7 the limitations on cell size?

  What is this cell's most likely primary function, and where coudnupk cc,b b42 b) gkaa*7qg4(ld it be located in b4*cgaqu kn2 (cdbg,74 a)kbpa mammal?

  Which of the following characteristics of type I pneumocytes contribut4;6myi:2pw.r n s m6aswzknn; e to increisy;n .mz64wkn6pw; nmsa:2 r asing 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 j 5mpe se3ty- y1y y.*-t/nwvqfrom a 36 year old. One of the functions of these cells is to produce red an1jqnymt /w y .v*e3-e5yts -pyd white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, whicu5 dj:1p tinq:h identifies cardiac muscle cells and striated musc1 qit: :dj5punle fibres?

Below is a diagram of a motor neuron. Neurons are the longest cells in thsm653c 6irh:ka k e:;qhdjm9 qe human body. 3im rk:6csa m he9qjh 5:q;6dk
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 +( sj4cpee agediwsk z44.2 a8syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two differentzejkp4ed se8gi c. 4swaa+4(2 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 im 3;m l-ki1aein the treatment e-3;aml i1ik mof leukaemia?

  The table shows the diameters6wp2+uqj n6c(.hxa ks of red blood cells from different organisms. Which red blood cell will have the highest sx+unhq(6s cwjpak6 .2 urface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximaox zl)5ndz4a:l convoluted tubule make these cells more adapted to the function :ozzxd4)5nla s 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 spe + l.5p:)pbycxyz:k ebcialised cells is/are not true? 5.y:cpb:zkx leby) p+

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 followinu sj 8 q- dieh76jgza7:1o0iydg is the correct order from smallest to largest?z1ad80h i7-s:jjqd 6eig7uy o

  Which row in the follow,33 on 1z )kpk0yyqmx +v4k)vzdrevi9ing table gives the correct disadvantages of the different stem cell sourc +ykq 30e) 3,vnxov y9ikd4zk1) rvzpmes for therapeutic uses?

1.Describe how the use of stem cells may be used to treat;d q-j;fvw qblu459oyl(3dfa type I diabetes in the futureqbfw ;v;o9j u-3d ldyq5(alf4.

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 scem ux:vo/,-9 hl7 ;afs1voysp8eim/t ale).

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

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