Which of the following statemezip (8x8yzv0n.q /a vwnts about the effect of surface area and volume on the cell’s zv(/8 xyqip.8wnv0z a processes is false?

  Which statement best describesy:qzn1k93v ifend,.kp:7 9tdft( gmp stem cells?

  Which is a correct description of the cell type adapted fo3hmbv)e soerf 862 4har gas exchange in the lu)a hr864mvefoes b h23ngs?

  Which of the following explai4dz ak4y +zi(rns the limitations on cell size?

  What is this cell's most likely primarybq/ 99 ii/8 lfz;wjmqu function, and where could it be located in a mam m9;uj/qbfizl q/i 89wmal?

  Which of the following characteristics of tf8.k3 at ;en. yexbfzr; v4m8mype I pneumocytes contribute to increasing thtb.3.m8 r ;faxmyzf48ne;ke v e 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 36wm5q 5;mb i8hk year old. One of the functions of these cells isb5w;m khq8 m5i to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and f)fn jmu j /78c-blhw+striated mus)8cn +ffhm-b/lw7ju jcle fibres?

Below is a diagram of a motor neuron. Neurons are the longesizn*m qva n1o/s 8(gvo, 2eco12qp)oct cells in the human bodygo 8in,p(zoqvc1 *2sncaoo2vqm1 )/ e .
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 reseb8f:swr2/s3 sb1jpak ors2;piratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram belowb2r ss /2 :oa1kefsbwj8;pr3s 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 a reason that embryonic stema1q(yy sfg7: +cq(r am cells are not used in the treatment of leukaemi7rqcgy :qm(+af 1 ysa(a?

  The table shows the diameters of red blood cells from different b 7lqgba/ ub)m4 t. txqm2ay6+organisms. Which red blood cell will have the highest surface area to vobm.)bqxagl a6ty m7 / 4tb+qu2lume ratio?

1.Explain how the shape uxwvy7f4 ) 0dtm l6:pxof erythrocytes and cells lining the proximal convoluted tubule make these cells more adapted to the functions they perform.x76w0mvfpy: d4 )l txu

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 y 2jct5e*cfg.g,+ag m/are not true?tj,acg*f5yegc. g+ m2

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 3u9t s4xzzz p2from smallest to largest? uz2zx 9ps34tz

  Which row in the following table gives the c vvw.m -gb4ztbn,3 ;fcorrect disadvantages of the different stem cell sources for t b.n; v-bmw4,fg3vzc therapeutic uses?

1.Describe how the use 2we. h7y9micbw1w p.bof stem cells may be used to treat type I diabetes in the fut ecw1i9w7 mw. .2bypbhure.

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 oz)q4c*zqbb k/5rxfwb 5 c w6ljlt(*p+ f specialised 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.