Which of the following statements about thevriz)h1z( owmp4c.)wnr, 4 re effect of surface area and volume on the p. h 4,zw mnre)( 1)iorvcwr4zcell’s processes is false?

  Which statement bestemsbs 37 b(tv: describes stem cells?

  Which is a correct description of the cell type adapted for gas exchange vxi8ep:;)j j zin the lunx8;ve:zpj i)jgs?

  Which of the following explains the limitations otgdeg4:mqtyl, o*-j11cm i6vn cell size?

  What is this cell's most likely primary function, mo6r u8e)2q/iocyq --bp t fa(and where could it be located in a mamm obu ry-fop(e2) qc-aqi/ tm86al?

  Which of the following characteristics oft et8jf(a9p-kdyu ,p;qbz m/1 type I pneumocytes contribute to increasing the rate of gas exch8umzq -;(1yefpt9k/ jpbtad,ange?
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. O u*sqf89-6*ib.u uoh p w +yf;bpaogi)ne of the functions of these cells is to produce red and white blood cells. What type of stem cells has the pay uf -ibhpqu*b)au* wi; 9opo gf6+8.stient received?

  Based on the Venn diagram, whichtaaewuchnazu+*)1f pd2 e( 8, identifies cardiac muscle cells and striated mu( w cadez2a eth8p* uf)a1u,n+scle fibres?

Below is a diagram of a motor neuro h c9av80akmy:0pjax+n. Neurons are the longest cells in the human bojx0 ma yv98+ck hpa0a:dy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from iu u 8uoh rbwuu6/9m*sjgfh7); nfant respiratory distress syndrome, which could be caused by a lack of sufficient surs76h gu u)um89rwuob ;j*hu /ffactant in the pulmonary alveoli. 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 l*w kezkcd96d 2d*;ida reason that embryonic stem cells are not used in the treatment ofk d *dz*l6idk9ew; cd2 leukaemia?

  The table shows the diameters of red blood cells from dif8xo2av0xo e4 mferent organisms. Which red blood cell will have the highest surface area to volume ratio? oaevxm2 8o4x0

1.Explain how the shape of erythrocytes and cells lining thk(1 zesb9yssl4; . nhaqx5 -jce proximal convoluted tubule make these cells more adapted to the function-4n;l5xh se bczq91ka .(ssy js 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/2 ggx*av9qz17 d0 yoij)-kmv iare not true? x a* q2z-kdvmg1) oj9iigv70y

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 y50 er lpyntj el*.(/7y xg;fxfollowing is the correct order from smallest to largest?l /efey0;7nt *xgpy r(y5xjl.

  Which row in the following table gives the correct disadvantages of the d 3r,b3: ou8yobnt k3ksifferent st,tr8 obsky:33kbno3 uem cell sources for therapeutic uses?

1.Describe how the use of stem cells 2a) e0fuz/8h 6q ub* fuwzgra,may be used to treat type I diabetes in the fu6)f/ *zz rfuqgauue h8aw2b0,ture.

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 scale).3 :uxr23 q byl/dz8j:k(quifp

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

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