Which of the following statements about the effect of surface are;bk6luq *h y3p;gha: e/l/ve aa and volume on thelhg :;hee;kya*//uapbql3v6 cell’s processes is false?

  Which statement best descdpw dnbqyuwscf u -df d*)h12()yi/94ribes stem cells?

  Which is a correct description of the cell type adapted for z+qdh7:uf;fia pd.vox/0m )wgas exchange in the lungs?ifo/u f)7wdhm p. 0a+xq;:dzv

  Which of the following explains the limitations on cell siz z j)85f84bhll6 laguye?

  What is this cell's most m(xup+om cr un; -7s9zlikely primary function, and where could it be located in a mapm mzxsn orc ;u97(+u-mmal?

  Which of the following characteristics of type I pneumocytes contri zkpmj94dfn(guie1;py l58u+ bute to increasing the rate of gasken 5j1zdgfi9 yuu +(l;mp84p 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. One of thgrf . jggo7b;e-4 v1dre functions of these cells is to produce red and ;g.efgo d-rrj7gbv4 1 white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and s p kx,l/hie+hzy6j9u d8+t2oq triated musc+ehd6piy, k9xho 8zutl2j/ +qle fibres?

Below is a diagram ou;1p tj(qtxt;aa xu/( f a motor neuron. Neurons are the longest cells in the human body.(att;xx/p(1q ujta;u
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 distrbnzhnqpn h-lkp(+ky /, f :.o+ess syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows -+/ q+hklkn,bo.z(f pn:yh pntwo 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 r eyr.5v2xo5xweason that embryonic stem cells are not used in the treatment of l.rew2xv5x5 yo eukaemia?

  The table shows the diameters of red blood cells from dina3 in)pk4y01g c cjj9 wd/or.fferent organisms. Which red blood cell will have the highest surface area to volume ratiok 9p )4caijcnw /r3.j 1nyo0dg?

1.Explain how the shape xm 9e*v: yru5jof erythrocytes and cells lining the proximal convoluted tubule make these cellsr95 :ue xyvm*j 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 cells and specialisqqy 5vp f 82:l;dqo namy;q5h(ed cells is/are not true?d5p; fqya(vyqm2:q ; n5lh qo8

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 largest*ahj k1l*9n wt?*jhl*nkt a1w 9

  Which row in the following table gives the correct disadvanta)ycv/v5eo s t qvkh8:6ges of the different stem cell s8t s5 vq)yk:coh/evv6ources for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type I diabetes in the+gov1 ;fb vd nlga)khd-3,sw* +s g1f)g -vk;h3vw dlna,do b* future.

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 specialig(cya*o 5, xt+(b xzmpsed 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.