Which of the following sta jr th5dxy kr;lk-b/)- d//8fsocma6ltements about the effect of surface area and volume on the cell’s processes is fal//-lr5kd )tbhca/rf j omd;s8 lx-k6 yse?

  Which statement best describes stem cro)e,+;m - aw fspcttdt4+il; ells?

  Which is a correct devs/n hc*fr.o6scription of the cell type adapted for gas exchange in the lungs?rfschv 6./o*n

  Which of the following explains daj2p 4om9 n8othe limitations on cell size?

  What is this cell's most likely primary funje9l1 su6)lxp wod xu*5ip v99ction, and where could it be located supxw 91 u9vx96i) *ed polj5lin a mammal?

  Which of the following charact8cd,n q(z 9 isct)f(ujkfz9s5g 58isferistics of type I pneumocytes contribute to increasing the rate of gas exj8nc,s igfc5k ) t(difzz q85s99su(f change?
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. Onocg/h)iz rm/3 e of the functions of these cells is to producz3)//hcogm i re red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and s-k6bjz ,z l c-tl;(ovrf; jg(dexv)o5triated muscle f-ovk- vlr5;jz(,le; f cxgd)j ( zb6otibres?

Below is a diagram of a motor neuron. Neurons are tuo16i, zdwka, p bihi49 px*u:he longest cells in the human bodu4uxiiazob: h*6kp pid1w ,,9 y.
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 reslayuuh5+lr p)oyz,nk4)- kq( piratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two d kz )+,kohynu 54ruplaql()y-ifferent 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 embrf6f f(7x;bws*d )n rxxyonic stem cells are not used in the treat)sf xnfb(d * f6x7rwx;ment of leukaemia?

  The table shows the diameters of red blood cells from different organisms. Whicht4t xl0*1-etr u+ewyr red blood cell will +*tterltr-0x4y eu w1 have the highest surface area to volume ratio?

1.Explain how the shape of erp*nedp89 ), h*qjevx+3jc o s8ysz3hzythrocytes and cells lining the proximal convoluted tubuzsh+8x)*9np ,h vej8 e*3pdoczs3jyqle make 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 stem cells aphh lgzh.x 1wzh ng+lb43w /- sa/.+bnnd specialised cells is/are not true? +gz+.alph-1bnbhlh 4sw3 n z/hx. g/w

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 smc9 kq; epv.5 mfgc tew16aq8a6allest to largest?9pfc6g6awq.v m8at1 eqc ; k5e

  Which row in the fol.niutr*obqoo. e 6x4g d18c/plowing table gives the correct disadvantages of the different st1o.opqx u/b 4t6*8i o. rngcedem cell sources for therapeutic uses?

1.Describe how the usrwf25j7:j(x zw9x*zuq w guq.e of stem cells may be used to treat type I diabetes in the futwu2x.:z f7wj u5(rq9w*qxjg z ure.

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 x54f 2 kcj a2miu5 xl,mt78drito 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.