Which of the following statements abugbl(4,gc, haout the effect of surface area and volume on the cell’s procelacb4g ,, g(uhsses is false?

  Which statement best describes sl gm9 ax 2/tz14sw3ecnlv z.(etem cells?

  Which is a correct description of the cell type adapds6e) .qhtfhf-h ouh5d 0oa /2ted for gas exchange in the hh5a-f0t uf o62hqs).ohde/ dlungs?

  Which of the following explains thx wa8o)*dv9g me limitations on cell size?

  What is this cell's most likely primary fu4 p(guh8 onpyip;wtayp/z +11nction, and where could it be located in a mammpp/8( u1 ito1nw4a pyy pgh+;zal?

  Which of the following characteristics of type I pnval xcb()vtfal ;4sqs avu7 9:p.r0d.eumocytes contribute to increasing the rr)va b0stdq.7:f.;v acupv ll4sx(a 9ate 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 v nrz,e38dc,p3vq+, bka ucx1 marrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient rece ,rk3qxu ,b8nvzc 3+cd1 v,eapived?

  Based on the Venn diagram, which identifies cardiac muscle cells and striate 1iwf8;kz,u .a n3r0xqcs4ob xd muscle fibres? 1 8,4w ;cq0fuxzoans .ik3xbr

Below is a diagram of a motora:;o wt))v;q 1faqpmpxo y)n( neuron. Neurons are the longest cells in the human body.) ;np1afpvom:wa;t yqx( ) oq)
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 distress syndrome,8 np9mohofnw :h xq5nuqe88 42 which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shq8xon:52qeu f4889whm op hnnows 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 stebs l( h mb8ca+j 3)fpqk3hv8t.m cells are not used in the bvm(qhp 3)8 s8k+3b ctlah.fj treatment of leukaemia?

  The table shows the diameters of red blood cells from d1mo tstp8n89mf, x zl0ifferent organisms. Which red blood cell will have the highest surface area to volume ratipt1,nmlo9 8z0x 8sf tmo?

1.Explain how the shape of qqx;bqv w7dl(982zgg erythrocytes and cells lining the proximal convoluted tubule make these cells moq8(q;x vw2 7zqb 9ldggre 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 speyxer61n9f)f6 7oechzq8 lac2cialised cells is/are not tru c 6l12c)e6 reazq x7y8fo9fhne?

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 ;dr3bxoj+x/ l following is the correct order from smallest to largest?r x;dbl jo+3/x

  Which row in the following table gives the correc 6b+ei6muvr6onef 4,et disadvantages of the different stem 6,6umie +e vro nefb64cell sources for therapeutic uses?

1.Describe how the use of stem cells may be used to tre(fg*c uj.yifr f2;n8gat type I diabetes in the f*fn(g8 ;f rj.u2gf cyiuture.

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 sc3oavn.hh3 u 2iss1i-q,0cfe gy uz.b 1ale).

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

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