Which of the following s.a 8 oq(rbdjkizn +p,t8o erf9o;hy 12tatements about the effect of surface area and volume on the hfr.(t aq2r8+1o9kji,oo p n; dyb 8ezcell’s processes is false?

  Which statement best describes stem cells?7f)8cm(yt ec b n,g2ai

  Which is a correct descriptiont pm4e vd:doc0 (a v+pixa3lcyd/f778 of the cell type adapted for gas exchange in the d70myvtp+cflo (da e :dvi cxa37/48plungs?

  Which of the following explains the ,7hl7azum )f-h7 jctn limitations on cell size?

  What is this cell's most likely primary function, and where could it be l( 9:kudyu zfdrs2ozq 0o178irocated in a m i1drz o9zd o82qfusr(k7uy:0ammal?

  Which of the following characteristics of type I pneumocyth aa7u;ii5s 8ies contribute to increasing the rate of gas exchanghi 7s;i8aaiu5e?
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 o)htbe( *- rd bqig*0dzn mh/ea*8f9fe f the functionffznqe db a9hi*mer8/*t(be -dg*0h)s of these cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac pk4o6/z7tl-mya* x0db h v 0vfmuscle cells and striated muscle x*lptz 70odm0yv-v/ak bh4f6 fibres?

Below is a diagram of a motor neuron. Neurons+pk *zvifmu ;-xy tt,; are the longest cells in the human bodytvk; *i-;f tyum,zxp+.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from way ngtklt9.i2p94 b, infant respiratory distress syndrome, which cltbg i 9p.yw24n tka,9ould be caused by a lack of sufficient surfactant in the pulmonary alveoli. The 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 followin2;vr7y2.flumtg9o na g is a reason that embryonic stem cells are not used in the treatmel m2gv y;2an9utrf7 .ont of leukaemia?

  The table shows the diameters of red blood cells f0mp:a aim2c9h dp ,fq 1c6myno +vf9r*rom different organisms. Which red blood cell will have thyp1m0c+df, onm*q m9ca:hif6ar vp9 2 e highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the pro-x (s1mt yson9ximal convoluted tubule m s tmy1s9xno(-ake these 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 ste gaga5fa lnerqfa/1c:9r/dr16i2f 0tm cells and specialised cells is/are not tru1f:rr01/g g a29en/ c ira6d5 tfflqaae?

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 followl pgjtl 4 spx.0d-0zr6ing is the correct order from smallest to largest?l zs-0l0 4 p6rjpxt.gd

  Which row in the following tabl,a/kr8e saqq; e gives the correct disadvantages of the different stem cell sources fr/kqs ,8;ea aqor therapeutic uses?

1.Describe how the use of stem cells 6g9 i:yg*dv9jkvg h*m8h: m xwmay be used to treat type I diabetes in the 8vghd :9k*vxg:m6 j9w gh*i ymfuture.

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 cellse/ns.(zvyb) 1ixvi; cn,kz7 r (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.