Which of the following statements about the eff;b9ri a(4o,dw u/sjzrk0j7 znect of surface area and volume on the ce urw,;azid0/9s zbj4jko (n7 rll’s processes is false?

  Which statement best shh * -wy*-+ge4so wgzdescribes stem cells?

  Which is a correct description of the cell tgxj9ekn h-;6s0 y6 tcbype adapted for gas exchange in the lby 69 jg; hc0-nkset6xungs?

  Which of the following explains t(aqp ync7cfd, i j18(the limitations on cell size?

  What is this cell's mosxu(n2t:b*:jld xw u yfbo0)ne5u(n 2wt likely primary function, and where could it be located in a mammnuob)5yt(n xw2*fux ::l(j 20enwubd al?

  Which of the following characteristics of type I pneumocytes coyt8d qqx;; j0kntribute to increasing the rtkx yj;0d8;qq ate 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 tramfv v-(mx5n9 uwtm6 o.nsplant from a 36 year old. One of the functions of these cells is to produce remtv.wv9- 5 um(xonfm6d and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and nuk2es zkh(m44g+t u7striated muhn42suz(kt + 4mu e7kgscle fibres?

Below is a diagram of a motor neuron. Neurons are the longest ngs5v p0k/x;a cells in the human body. a vn p/g5ksx0;
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimhl)4xo n.gjz:9* .d kqc jz4lces suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different 9x.dcl)q jokg 44zc .lh:jz *nalveoli 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 u +e tpbj99qtqoa li1/3bf 0/othat embryonic stem cells are not used in the treatment of leu oa0 o1bq/l/ p tjb3+eiqf99utkaemia?

  The table shows the diameters of red blood cells from diffe2 g *tgjhz4. nmkao+-lrent organisms. Which red blood cell will have the highest surface area to volume ratiomkz*log2 j.4 h+ang -t?

1.Explain how the shape of ery+vx(e4v 5ezak1ph + 2xg3rh ihthrocytes and cells lining the proximal convoluted t ax x1i+e4h v(ze2khvrp gh+53ubule make these cells 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 specialised cells is/ar*i;b bv5hpitk y-n8ryb 3z5e :e not trueter*vb 5:zy;ib h3y8kip n 5-b?

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 largestjry w797pahc -?j-h9 ryp7 7cwa

  Which row in the following table t/l5d+-5l 4 sov9y ngydoy4upgives the correct disadvantages of the different stem cell sources for therapeuti/44v -oy5n dolsyudlg9yp+t5 c uses?

1.Describe how the use of stem cells may be used to trjaz.;y4 rz8:1nlh(mcj lj peqvl)/+ meat type I diabetes in the fut +mj1zrqh .;) 4 jm(p/8czy enl:vllajure.

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 scayw 5qgle8r* 4zyq d61xle).

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

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