Which of the following statements about the effect of surface area and volume onir(9 k72 j(ylf abt:nf 0hljd/ the cell’s pr tyd(2rb(j7 /fjll n9k ifh0a:ocesses is false?

  Which statement best describes stem cels+2ppe zz6p .kls?

  Which is a correct descsrsomfb7+8+ 3;gp xi, mkg-nkription of the cell type adapted for gas exchange in the lung + gmsko7-;fp+3rmin,xgksb 8 s?

  Which of the following explains the limitations on cell s zg+ ebghabl3 g(,m x q3ty082w05ghulize?

  What is this cell's m ky. ffp37;jwy2cc5m1c/seu n9- ytoaost likely primary function, and where could it be located ie5 mfp3c9 7oc.a ;ks unc12/wf-yyyjtn a mammal?

  Which of the following characteristics of type I pneumocytes fpwc2(*vov5 tkeu1 b1g)mp/ icontribute to increasing the rpbve*ki mt)g(c2/ f 51 o1pwvuate 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 bonea5r pj(r55wn n marrow transplant from a 36 year old. One of the functions of these cells is to pronr(5a wrj5n5pduce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and stv0;i g3ciy 1zkriated muscle fib iyi1cg 0vk;z3res?

Below is a diagram of a motor neuron. Neurons are the longest cells i /mg20u)znmfhw7 .w1 pmka,cmn the human7cwhw/.,m 1 g2mzupkmn0am f) body.
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 d rv5jkl .wex;ee/ 2.hsyndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structl;5dxv kjwe/ ehre 2..ures.


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 afo2ut/ 8l4ls96rlf5 txz v:cq reason that embryonic stem cells are not used in the treatment of l9v6 8t/z 4q osfl:2xllr5ctfueukaemia?

  The table shows the diageqgw(d;5jp m94eo2 k c: 9ysjmeters of red blood cells from different organisms. Which red blood cell will have the highest surface area t5eyo42 j9 :sqem ;pdjg9gw c(ko volume ratio?

1.Explain how the shape of erythrocytes and cells lining theh8 edor*57q tt proximal convoluted tubule make these cells morr57td*oehtq 8 e 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(hy honnq1o.p/ayxr( - 6hyp5/are not true?hh y- yo6hy 5qp.(ar/n(xop n1

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 fq5* ffncjf*(; 9on-2wqu vukyollowing is the correct order from smallest to largest?n-y;u2 u* vq*ncwffqkfo 9j( 5

  Which row in the following table gives the correct disadvantages of the differei.s +jj 7:nwdent stem cell sources for thera.:njw +i sj7depeutic uses?

1.Describe how the use of stem cefdv:o5t/wr (wc kav v.3h9x s/lls may be used to treat type I diabetes in the future.ws5rcv :3 w9t fxv/h/v(k dao.

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 scv3;j6goc+ e+:wuoe hegl /4 /udle/ls ale).

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

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