Which of the following statementsjn h-d/s qi dzis6c;4* about the effect of surface area and volume on the cell’s processes is f4ddin*ih-;/ ssczqj 6alse?

  Which statement best des+.-e tl0e)y k4s2 w h oboo-b(q(srdrscribes stem cells?

  Which is a correct description of the cell type adapted fory2fcx0 (z h2 4grq l (f*lf1-6ywhcxfr gas exchange in the lungs?1* zf( chxxff-fwqc26r yhy0 lr4g(2l

  Which of the following explains the limitations on crix g- 5rd qgjyqf,h7h/d/(h (ell size?

  What is this cell's most likely primarnlu7; 5p a d xq9wex(.7rzs;zry function, and where could it be located ;zxxa9srd5 7.r;npu7ew(zq lin a mammal?

  Which of the following characteristic:(,sxd+t7gbvi b xn)qs of type I pneumocytes contribute to increasing the rdb:)g txnbsvix(q ,7+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 transplant from a 36 year old. One of the f m44 p0 ybcir4:xkag.nunctions of these cells is to produce red and 4ma:xb i4 pgny r.04kcwhite blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which iden*bn/) y iyjp-ntifies cardiac muscle cells and striated muscln)bi p- y*n/yje fibres?

Below is a diagram of a motor neuron. Neurons are the longest cell69no.d 4ts3m7 blw ybls in the human bob64mst937 ybd .lw nlody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer fromne0h63t ds45ug*bo ,f0le p ul infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two differenugp3lds6u0enh5 l4f0, eb* ott 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 stem cells are not used brpsu* fd: +cfho (g85s0df+qin the treqb+0 u8p5f scd :frg(fos+d* hatment of leukaemia?

  The table shows the diameters of red blood cells from diff:g gzwtv:e m,0:dyz*-3zv-qgvz w u,gerent organisms. Which re0 emy zz,zg,:z*wu:v wqt-gg- :vg3dvd blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal conv w7akiw27e.b,du :oalw86m ut oluted tubule make thesiw6kwt8u, : a mw7e.daol 72ube 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 cos1i6g+h- 5vfp ;nn ho48h kznells and specialised cells is/are not tru-58hhn 4zoohv6+k f in;1npsge?

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 smallesta5(h+jpyz2bt/q. or7 piw df*z v 3gp0 to largest? z(dj7fwr q.bap0 ivhpz*t35+y/p og2

  Which row in the following table gives the correct disadvantagerrpt ;b23p oj f+0*kvjs of the different stem cell sourc 3 0p;+brvtrj*fjko2pes for therapeutic uses?

1.Describe how the use of stem cells pn.oeaz50 qtz gw.; ag4 ej:4c;oz;qomay be used to treat type I diabetes in thez4ot 45nq .g.c0;e:g a;pzooaewjq ;z 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 ofxes85 mi lh,q3 specialised 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.