Which of the following statements about the effect of surface area and va3zbt0d-rw24 a e x,mrolume on the cell’s process3x0a,r t 4rwdzmb a-e2es is false?

  Which statement best describw4-f9y m1ksfu4:i*zu um z+ ckes stem cells?

  Which is a correct description of the cell type adapted for )bvz 5mcnmau2;:ff5 vgas exchange in the lucvb:fmn5m; zufv5a2 )ngs?

  Which of the following explains the limitat6se hg(*b- ilgions on cell size?

  What is this cell's mostqk )0 3tq6ex hdfghrw;998rts likely primary function, and where could it be located in a mammdgr3fke) 8rs6hqhxttq ;w 099al?

  Which of the following characteristics of type I pneumocytess- 6 b :(j dcnnv,pi5mc3tb*mi contribute to increasinmb3b5 n-,(t 6d*p vc:smciinjg 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. Onx( j ,4ggx8zrcw+5si me of the functions of these cells is to produce red and white blood cells. What type of stem cells has x w58+4 rzic mggj,x(sthe patient received?

  Based on the Venn diagram, which identifies cardiac muscle cel ttju0g+ho3m +5yxg2a ls and striated muscle fibo+ u3ta+t0 xgj2gh5 myres?

Below is a diagram of a motor neuron)o,ilr0lv4ezo tl cko( 5.,k s. Neurons are the longest cells in the human l.4ic,5ovrkot o ( klel z),s0body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from inr3oqai(v)ch9m : op*qfant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows twqv9 ma) opc :*(io3qrho 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 thao u rwgwei021 zy5)3ivt embryonic stem cells are not used in the treatment of leukaemi3 eu1z0oiy)2 gvw5 irwa?

  The table shows the diameters of red blood cells from different organig/33df8v5oygjf dz ocn2. nx5sms. Which red blood cell will have the highest surface area to vog5.vf n fon5/3 gyoz3x8 c2ddjlume ratio?

1.Explain how the shape of erythrocytes and cells liniouwl; qtq( / t;3rn+kd0rd y(qng the proximal convoluted tubule make these cells more ad0t/+;3or yt(l knd(qq r qdwu;apted 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 cei anqn( o*ks1+f 6.7ds5 ctdld mk8wt+lls and specialised cells is/are not truewod.8* dk7k1ctndts( +m5la fi6+sqn?

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 4+e- hyujt:v7dig3j hlargest?7vheyj dh:i-jgu+43t

  Which row in the following table gives the c(zuj*e( vyxu/orrect disadvantages of the different stem cell sources for therapeutic usuxvyj/ (u e*z(es?

1.Describe how the use of stem cells may be used 7x -2i/o4dp(vwjcal-4icpm yto treat type I diabetes in the fua/ lx4ovp jw-2d4 (ypimcci -7ture.

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 (r.;6:x o5u2qiton1wa x3w qmjnot 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.