Which of the following statements about the effect of surface aueofvmo y gcakw984 3,k6.e9 erea and volume on the cell’s procm4kw a6k9e fe.o8y9 vu,oc eg3esses is false?

  Which statement best describes st;c6meh+n6f rr wdf*9iem cells?

  Which is a correct description of the cell type ajq7 ao o i(q73hib-s4qx*p4cy ,loo oz1i1-wldapted for gas exchange in the lungsaqwhio1* so 3q pl zx-bo7qcy 4147oji-,oi(l?

  Which of the following explains th- 5h mfnvrgi/7e limitations on cell size?

  What is this cell's most likely 5ja5 5qe 7ms j-jz4gorprimary function, and where could it be located in a a5 4jzjmsjqrg-o57 e5mammal?

  Which of the following characteristics of type I pneumocytes cont)bvg3 ktzty zg (z(v:2ribute to increasing the rate oz(z v( 3:t)ykv gbg2tzf 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 marz176qw ily8 jb4pr+ oe68fygfrow transplant from a 36 year old. One of the functions of these cq 1oj yz8lg4w86fp+i f yer76bells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagrau m7jg3koh,j*8 s pa3lm, which identifies cardiac muscle cells and striated muscj ka,7suoh83lj*mg3p le fibres?

Below is a diagram of a motor s f2qa lkkf*+)fsn 85pneuron. Neurons are the longest cells in the human bop 8 fk*kfsqf+2 )an5sldy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer u ow85*azvgf.t5 ifz(/;yegt from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two di5g otvf(*tzy w ;aufe/i5 g.8zfferent 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 rea l :e:-2xilx/7t :etmekdd t)ison that embryonic stem cells are not used in the treatmtmke )::7l2die -:edti tx l/xent of leukaemia?

  The table shows the diameters ei0umlf m dh.t:0jy0/ of red blood cells from different organisms. Which red:0 j0hum0m/fdy.tlie blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal convoluted3j;,hq df)gge.o f1wbmfy6 v g94kz 5c tubule make these cells more adapvb1 5 c6y,jf qg4.3k wzde9fg); ofhmgted 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 specialr2rd jh*snjqz90k4 y-ised cells is/are not trued2*sznj 4ryk0 qhrj9 -?

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. n.-5wwxtx2l-38 yhqprh4of +kz gn)wcud /q largest?gn2y/)qtwoqr fhc4zx8d+w-.x hkln3pw -. u5

  Which row in the following table gives the correct disadva43qbd6jam6)u *b +k cr6oqoupntages of the different stem cell sources for t6u6dor3*qb)c6opajbm ku 4 q+ herapeutic uses?

1.Describe how the use of sjo uo4 ;vnpx,4tem cells may be used to treat type I diabetes in the future. xp n4o;o,v4uj

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 cel* 1hj yqkj19 vxz5po 39*mjquols (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.