Which of the following statements about the e )iy o.2eqkvc vh+o*8f7hq:zxffect of surface area and volume on the cell’s processes is faeh2kyzvo)i7*+q. c:8vx oh qflse?

  Which statement best describes stem cell) :s40f 4iwlidsx h7tus?

  Which is a correct description of the cell type adapted for gas exqf6 tidv7vsg,hn69ps 4qp 7p ;change in the lungs?p,7dv7 4 siqs6fq9hn p; pg6tv

  Which of the following explains the limitations 38n7 yg,zhldlne9o - *xpnx6p(p+bwcon cell size?

  What is this cell's most likely primary function, and where could it be located7qh7oufe0 ;wapnh3.d giuzbohk j4 g,8/d -,k in a mahu,d j/ooi;p4fhw7zakb8e d n3k.ug7gh,- 0 qmmal?

  Which of the following/znm9l 4hw3rvq 9gl7 g characteristics of type I pneumocytes contribute to increasing the rate of gas exchangq9 w nzg/l43rg vl9hm7e?
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 ol pri6z-:e2snm sv*(p yd. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient reesr z2mny -p(v*p6:siceived?

  Based on the Venn diagram, which identifies cardiac mua/j.v2q riod b )jy7c3scle cells and striated mus32v7rbqia. o jcj )d/ycle fibres?

Below is a diagram of a motor neuron. Neurons are the longesdmp:2lit, m*d8fzgm+ t cells in the human body. z+dmgf2p lt*m: i8m, d
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer 9 hmw 2at zyu)ho35fgb xg6w2f62aab) from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The di y6)wabw g 3)bg6fahaf2o22h 5mxtzu9agram 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 followi1 nk)sjw* i/wz7 a0(vxhs.bna ng is a reason that embryonic stem cells are not used in the treatment of leukaemia?.s* wn/h(s7w)j1 na0i kvbxza

  The table shows the diameters of resr:9674 scp mj)v.x 4enbyuv qd blood cells from different organisms. Which r )us6j9yc4bnmr7 x.vps4q:ve ed blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining tc1gy0ev4dajk,z i(*x,(jchq he proximal convoluted tubule make these cells more adapted to the functions they pqd( , y zeka0h(cv*c4j g,xji1erform.

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 emb7ci ni8tixc3u i4u p-4ryonic stem cells and specialised cells is/are not true? 8i4p 4uic3nt-u xiic7

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 0kr6jgz g5yh9 following is the correct order from smallest to largest?gh0g6zkr 5y9 j

  Which row in the following table gives the correct:z8irp 4 wign(6*9v bcwi x,hk disadvantages of the different stem cell sources for therapeutic uses?wx68 iirpvz(*bik ,w4 c:9ghn

1.Describe how the use of stem cells may be usedpee7mld v v vif*/i)hnl8 j9 (g5-mu7z to treat type I diabetes in the fv/m)gv(m9u 7 dlieenh-5 zpv* fl8 7jiuture.

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 (y 4n )fiueuvyi1d29 5wnot 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.