Which of the following statements about the effect of surface area and 6x 8wwkdx3,*l i6dbbb/5xkl cvolume on the cell’s processes isxkklxi6bxbldb 3d w68*w,/c5 false?

  Which statement best descr c(x6aj *9i)yigok:zwibes stem cells?

  Which is a correct des1:b 7jitx*fu fcription of the cell type adapted for gas exchange in the lungs?f j:*b71 ixtuf

  Which of the following explains the limitations on cell siztu 3(hv muv98+x6dqdue?

  What is this cell's most likely 5r.(/ygio ywu 6br2ph primary function, and where could it be located in a mamr5iy o2 pr(hbgw/ yu6.mal?

  Which of the following characteristics of type I p/pa 4bq-6azd dneumocytes contribute to increazd6b4/ aqp- dasing 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 vq/i63 ei3old1 w sao24civb-marrow transplant from a 36 year old. One of the functions of thesio-qce3il4adb6v2 v 1/w oi 3se cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagra9713e gpn wr26rsde i5xs ec7xm, which identifies cardiac muscle cells and striated muscle fi 73r2cdexr 19ei pss56egxn 7wbres?

Below is a diagram of a motor neuron. Neurons al+3sao uyfb-3m yj)4z re the longest cells in the human bodya3ym3b) -y j+4zulso f.
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 respiratory7fww9l *vlcust:gzj 3k) 9z p3 distress syndrome, which could be caused by a lack of suffg 3u)*zfl:wl7 t9wcp9j3zvs k icient 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 following is a reason that embryonic stem cells are not used i; d5r)fiq/gnin the ifqi/g;5 r dn)treatment of leukaemia?

  The table shows the diameters of red blood cells from differhn 6 f f*xvc25hxlp9-p5*vmdgent organisms. Which red bplh f-6fp5vvxn**2xc 5 9mhdglood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal c22n(d;ap g opqonvoluted tubule make these cells more adapteda2n2pdqp;o g ( 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 an) ns)z :xpsv) fg0k 2cazs;k0pd specialised cells is/are not true? s;:zfan )0)2 0k gksz)pvxpcs

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 )pg(ay p+070wcesnwz is the correct order from smallest to largest?npwws)70(pag0y +zc e

  Which row in the following table gives the correct disadvantages of the dif 0qcwnot 44jrrh 18)6rdq 06*a tahp)ygpx+k zferent stem cell s0t16h q rtn6)yrk4p 0j g)+w a*rx d4hpoq8zacources for therapeutic uses?

1.Describe how the use of stem cells may bey3a8ae6b)d)izi p1ae used to treat type I diabetes in the fut ydi18)zi 3eeba6a a)pure.

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 scas7iuh1+t+-pdedk(2 bc pnc7fle).

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

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