Which of the following state;/q,,amh5ywvq z*vilk;: cul 4v3tlegb;xe +ments about the effect of surface area and volume on the cell’s processes iiyu5 b:eqvlv/,hmv34,tqg l+z; xe;akw;cl *s false?

  Which statement best describes stem c0lzv:gi k( :d2:batacells?

  Which is a correct description of the cell type adapted for gas exchange in thcpjny8 *ocof l:w)0+v e lungs?*)co wvp8lnjcy 0:+of

  Which of the following explains the limitations:/jp*l x;gygex9n k+ k on cell size?

  What is this cell's most likely primary function, and where couldvqafvm3e-1x ; it be located mf q1;av3-e xvin a mammal?

  Which of the following characteristics of type I pneumocytes contribute to ix -vk)nao :3/x9ie jxlncreasing the r9 - ao3 e/xvk)xl:nxijate 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 frovr ug41 knw vg3)5qieyhs5y,9 m a 36 year old. One of the functions of these cells is to produce red and white bloogqh4n5yks1,u gie35v) 9rwvyd cells. What type of stem cells has the patient received?

  Based on the Venn diagra-j h9sq xjc6pv)0aobcyujhuh:4 ) z**m, which identifies cardiac muscle cells and striated muscle f- :46o*s c*vhqj)hhbzy0)ju a 9ucxj pibres?

Below is a diagram of3g85d tcig,-(awiu6l:: ewcccj r*qu a motor neuron. Neurons are the longest cells in the human q5giwcctu*c je: : 683(ir-uw gdl a,cbody.
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 res/2/otvur*e s vg2 c;zmpiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alve/r /sg;ucv2o2t* zvem oli 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)g honp93doprwq4c9hv y 3 0:l used in the 0vn4cr:dho9 hoqp l9 wgy33p)treatment of leukaemia?

  The table shows the diameters ofkp,vf(f s ;9 ceb*)iir red blood cells from different organisms. Which red blood cell will have the highest surfacv(9kffbc* );ir p,i ese area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the pr o*:j44jl ard-,/ snhczt f/weoximal convoluted tubule make these cells more adapted to the functions they perform.dswtjf/ o ,rjl:/eahz-4c4 *n

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 ems- jb 8vv ul//;myad;mbryonic stem cells and specialised cells is/are not truj vmlbv-m;au;d//y8 s e?

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 larho 1)jrm ;a +fuieu0m1gest?1;1+0jo u fhim era)um

  Which row in the followinoan+qt+4 d*wz g table gives the correct disadvantages of the different sa+no wqt*4z+d tem cell sources for therapeutic uses?

1.Describe how the use of stevj(2ud:p+q b4j;y ghem cells may be used to treat type I diabetes in the future.4pgu hjv2j:( qey+;b d

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 toun rgy2i(ymz.6, mt5z 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.