Which of the following statements about the effect of surface area and vls0z 4n gjrt9u *iqis1)s3knh+k9x5zolume on the cell’s processes is+ 5k14nsq i93u9s*ils r gnj0xz thkz) false?

  Which statement best describesi+ru vnd c(14s stem cells?

  Which is a correct description of the ce6tx .ypz*u:4f22tuwm .k tmit ll type adapted for gas exchange in the lun u m2w tm: 2..tk6*uptxzi4ytfgs?

  Which of the following explainxm;:m7f suo 3,a9y-k ji,ab -zavw 0l)hlqdm2s the limitations on cell size?

  What is this cell's most likely primary function, and 2usy l* xum(z6+ parg;where could it be located in a mau a+6y2zxpg; m(ls*urmmal?

  Which of the followingbrn/iy. ( niq) o89mfm characteristics of type I pneumocytes contribute to increasing the rate of gas exf8qmi)by.mn ori(9 /nchange?
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 3 kx7*k7m .fuse6 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem ck7s* fekum7.x ells has the patient received?

  Based on the Venn diagram, which identifies cardiac musu- r 2lqubx7w ek-(/chcle cells and striated muscle x2e7ur k-cq (bwl- uh/fibres?

Below is a diagram of a motor neuron. Neurons are the longest cells in the :wynj:qz-*rs1z qzx2th: *s mhi/ 9kjhuman bodr w:2q1ijxt y-n*9qsz:khj: hs* /zmzy.
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 +qu qoq* - o:/oyotsv4respiratory distress syndrome, which could be o4 qo-v+ oqs:* ytqou/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 following is a reason that embryonic 9 rdmq+y.sfo )stem cells are not used in the tre dqo)m+y.f 9sratment of leukaemia?

  The table shows the diameters of red blood cell tgiqtd (83nz6;wlf v(s from different organisms. Which red blood cell will haveit( d6ftz3( wn vg;8ql the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells linih0 ,0q8ad-rx9b2zg 3f jm paikng the proximal convoluted tubule make these c , hkg0q3i-z0f2 ra pdxmjba98ells 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 stem cells and specialised cells is/are n4w; vhv+ r+xw(xtj pa4ot trupxwt;4j +4( xvha+rwv 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 largestvr/+um 8 3rbgs+f nht0?/80 rgtf+3nvmh ub+ sr

  Which row in the following table gives the correct disadvantages of te qq9/azmx-s (he different stem zs(9q m- xeaq/cell sources for therapeutic uses?

1.Describe how the usehm;f;4opzzt p d*u89t of stem cells may be used to treat type I diabetes in the fupmt;4oh8tu*zz pd; f9ture.

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 scalgtzfv ge pnvq+553(m 0e).

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

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