Which of the following statements about the effect of surr k4i3n ruk1xrrqa e700f,-4ya8 iftb face area and volume on the ix 8arn f ek4kfr,qt7ra3yir01 4ub- 0cell’s processes is false?

  Which statement best describes stem celluswij vo 2f/xo4q 7*)hs?

  Which is a correct description of the celluy a9vp.cqu8ltt0e 88pd0g j) type adapted for gas exchange in the lungu08pg) 08ljqdpvct.u8t 9 yaes?

  Which of the following explains the limitations on ;lrs m)hxu 30xcell size?

  What is this cell's most likely primary function, and where txya 87u 8ngp(- 0a-lhn ddv-tf/lcd0 could it be located in a mammyx (0dpt a -/canv-0tl7ddfn-8h ug8lal?

  Which of the following characterfj ju-0hr2/x7d9 rs3fg9 mgtyistics of type I pneumocytes contribute to increasing the rate of gas exchange? trx mf230 -rs9gyjf/ j hgdu79
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 olda8ma9ynzzp 8b. 9wq ;m rly)*w wg)hk). One of the functions of these cells is to produce red and white blood cells.yza 8.*;p8yw wh m l9bg)mankzqrw) )9 What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muswcl pux6beh01a 4u1p1(m t/s ycle cells and striated muscle fibres?1b1yhw4al6epc/ (xu ump 01ts

Below is a diagram of a motor neuron. Neurons are t ,+py z-6 lmj6 (0ciwepdvbq*ghe longest cells in the human bod 6v qwj,iplpeb-y c*0d(6+gzmy.
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 distress syndrome, 4 pglp p+xmh2,5) -jfnoemg0, sba) spwhich could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram e ,x4 )b 2fmshjg+popm0l,gpn5-a ) spbelow 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 t - :fbdp/e1yeghat embryonic stem cells are not used in the treatmeny:e 1b g/fedp-t of leukaemia?

  The table shows the diameters of re,uok 3rtf 85v0xd0c zcd blood cells from different organisms. Which red blood cell will have the highest surface area to volume raticdzfrko0c05 3x v 8tu,o?

1.Explain how the shape of erythrocytes and celly,oinl*j;c n 1s lining the proximal convoluted tubule make these cells more adapted to the fu1yol,njci n*;nctions 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/a2 2r3 wpoebefg6(tvq9re not true? qp 93w2(beo6 retgf2v

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-ka d-cfoc2 6j following is the correct order from smallest to largest?- dkc-oc62 faj

  Which row in the follow xwxe8xk3v tg8bpk+,+bg 0 * qtg+;kizing table gives the correct disadvantages of the different stem cell sources for therapeu+p3qev *+xgbg,kk0 x+i8zk x;tw8tgbtic uses?

1.Describe how the use of stem cells may be used to treat type I dn.tca2i9g zgl 3ejz/71- bjuziabetes in the futureuzg / g ja.e-ct39zli7z2 nbj1.

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 ofew- 8yesr5rx i7u)sk( specialised 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.