Which of the following statem6c:v:c h nu3 9m)bpbyients about the effect of surface area and volume on the cell’s processes is falscuvc)n bm3ih6 b::9pye?

  Which statement best describes sf.bk1,6e jlb(szd.ygzywp1 9 tem cells?

  Which is a correct description om+n1en/n.;t:otjvc)af1u 3a gd7 zv kf the cell type adapted for gas exchange in the lm.;c7 kn1e ndv3 tgu+a/t:o1)z jfn avungs?

  Which of the following exp8op4luc0; n5 ah i6eh7y kgd:ylains the limitations on cell size?

  What is this cell's most likely primary function, and 0gtx,j*- 9 lfk uv/gyywhere could it be located in a maytlxjvk0uf- y,/g 9 *gmmal?

  Which of the following characteristics of t mmc*vg-7 ua8usquazw, r)8 k2ype I pneumocytes contribute to increuu,8)ku-vz 78a mws *rmc2aqgasing the rate 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 0nyrl3(mvxf0 year old. One of the functions of these cells is to produce red and w0 yf( v3lnm0rxhite blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac musc,0dbm j1q:fs*4vpv t sle cells and striated muscle10,fq* sj p4v svmt:db fibres?

Below is a diagram of a motor neuron. Neurons are the longes2m) /gskp8sgggm p:-0jcbf6 dt cells in the human )p:fpms gbs- d/cgj8gkg0 62mbody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffw.b-l nhu 4;c5hw w ye2yx9aa yul0h8-er from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. Taw4hln 8.ecxya9l ;yu02h- w-uwhyb5 he diagram 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 following is a reason that embryonic stem cells are not used in qv/4zvj cgw aczzn*v0.vo bk5)54k3d the treatment ovv) v wo 5vc0j4akc*.zg5z/b kqn4z3df leukaemia?

  The table shows the diameters of red b;w 8j9u t g.i dgwg;;+tnf0kfslood cells from different organisms. Which red blood cell will have thegtn.gkt;wg0f8 ;jif+ wds ;9 u highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and ce btj;t 3wlh4,88wolo k.pl9 brlls lining the proximal convoluted tubule make these cells mo9llro bl3tt,p;kjwbh8 4w. 8 ore 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 specia: xv,i at-dk2ifj d7x6w)gd8 olised cells is/are not true?jox )2t:xwkd7g d6iv- ,i8adf

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 cor3s*wgac471le n4dm vurect order from smallest to largest?d w4s*me31auv lgnc4 7

  Which row in the following table giv talp;f(5824v peyo e81 b-fw hjm3wcdes the correct disadvantages of the different stem cell sources for therapeudfwb3w1am8-p;(l5eh 82 p e4 ftocv yjtic uses?

1.Describe how the use of stem cells tgan75 c .couf2o,it 5may be used to treat type I diabetes in the fut.no7af 52 gt5 u,ccoiture.

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 scale). l 9hjcic8t6z9

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

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