Which of the following statements abf rg8zt/ wd:4uout the effect of surface area and volume on the cell g/: ud4ftz8wr’s processes is false?

  Which statement best describesryri j+f :6w,oi0lpr* stem cells?

  Which is a correct descriptzyq7 hqkj uuk+/w7s1rs-1wyit:w+ k- ion of the cell type adapted for gas exchange in the lunj1 : -7i/u7k+zt1q wwrqhssuy kyw+k-gs?

  Which of the following explains the lef/y(-;0y u iyg i,mofimitations on cell size?

  What is this cell's most likely primary function, and where could it be loca mz *da)ww;jvei4q(9e ted in a( e9wvaeqjz4 );imwd* mammal?

  Which of the following characteristics of type I pneumocytes contribute to h(c(d l2 wzz6bbcttqs*,, qx5 increasing the rate of gas exchaxb(,s*(t2z b 5 thlz,qdc wcq6nge?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marronwh 9p ix3qze 5)epk1ea/h6l6me 8 0zcw 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 hasp /e6pz5l8w0h k39ei1z nmqacx )he 6e the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and striatedrg*: 36o,fq ayaxzx:c x-wy6q muscafygq3:xz 6a:,*yx 6 rwq-xocle fibres?

Below is a diagram of af mc./z55pa*yfr9 wm k motor neuron. Neurons are the longest cells in the human bozpyk ma5*f59 /w. mrfcdy.
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 syndrome, - v i;db a40pkfo*0,6tbryhifwhich could be caused by a lack of sufficient surfactant in the pulmonary a iapftk,4vy6* ibo-0rhfd;0b lveoli. 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 followin a9p vh,9tottro1/h: gg is a reason that embryonic stem cells are not used in the treatment of leukaemi:/rhopta ,tt9g9h v1oa?

  The table shows the diameters of red blood cells from different organisms. Which 8iq y4b0kw;nr w7n+wd red blood cell will have the highest surface area to volumw0+dq b48w7wy;r knni e ratio?

1.Explain how the shape of erythrocytes and cells liningi2rb hdunu6(zu m1: z6dyquqcw 2,h78 the proximal convoluted tubuc hb22 qr1 yu:hw86uizd7qd,(n uuz6m le make these 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 cey.y *op6gpvd)e( 4sdx m*w 0pfjhy8*tlls and specialised cells is/are not true?(p*pm.t yv y*)d8 hpj4xd f*ywose 06g

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 order from smallest to lar5+9o e;we; zehrp6o xto y/l9q:wy3y cgest?r9/ep w hxt;wol 6c:953+yee; qy yozo

  Which row in the following table gives the correct disap keis zmc m5(nw*f(,*dvantages of the different stem cell sources for therapefcm,(ipzsn* 5 kme(*w utic uses?

1.Describe how the use oft 3;oyeafte4wb:4qrt5 u8 0lf stem cells may be used to treat type I diabetes in the future.l 44b8y3r ueaftf5 wqt t;e0o:

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 specialise9elxg9j 3f x6cd 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.