Which of the following statements about the effect of surface area and volum*; ;kra, j.5vscr pjdme on the cell’s processes is m jsj,r. cdv;5 *;arpkfalse?

  Which statement best describes stew9 t,1xo2;njg.qh e .hllia:um cells?

  Which is a correct description of the cell type adapted for gas exchange in theqd6lpm9s*rxi n 0k- ++x pc2tt lungskp-q xd6 0mc+* itt9lr+xp2sn?

  Which of the following explains the limitations*xipvrrv0k g6 3*d;u w on cell size?

  What is this cell's most likely primary function, and where cou;vso b* oq-xj.slk 2y;5r6ubn ld it be located j; y5;2o*bbl-s xko.vns6 qr uin a mammal?

  Which of the following characteristics of type I pneumocytes contribute to inookio,95 pq t1creap1 q ko,5toio9sing 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 year old. Onennwelt blek65 :r../ v of the functions of these cells is to produce red and white blood cells. What type of stem cells har5v e .:el ltwb/6.nnks the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and ss;ak;a/ -m6 klr k(ddhtriated muscle fibreas;k k-dha/k r m6;(lds?

Below is a diagram of a ma 2gu ((uzzu./f(klxryo0g3 bhg3h .-vk uf3ootor neuron. Neurons are the longest cells in the human borug0x3 2zl.uf( (kb(g.guhyua3/ hzv ok3f- ody.
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 iuyjm59o7 hc)distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different i y)jhoucm97 5alveoli 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 in7pmvd7k,z)mx x o/ zg0 the treazz)om/dx 7 ,mvx0p7 gktment of leukaemia?

  The table shows the diameters of red blood cells from different organ 8j9rz b*a vslyo1ku.7e ;t.poisms. Which red blood cell will have the highest surface area t7vo;y8 b jso1leu r.ta.pz k*9o volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal con58 amg7e e di32.lnejxvoluted tubule make these cells more adapted to 5e2e 8e mjxadn3l.ig7 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/:sogc98+wcpa j2ef4e.u )rq s are not trucg98ep)c4se fruw+q 2aoj : 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 orde )z8bbtk+:srj )n skv0r from smallest to largest?kb zs)0:8 bs) njkrtv+

  Which row in the foll ucrdb,1ee5 )howing table gives the correct disadvantages of the different stem cell sourcesc dee)5,buhr1 for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type I diabek)qnte. c- fxj8ho iwg6bi:)y blr;8 9tes in the futu8bn co:9j -hx yqirw)e).t8kfi; b lg6re.

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 specs0 gmok:/j5v56 tnqo79l pe xwialised 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.