Which of the following statements about the effect of surface g3kdr mj cu )2zb,8j (xrl:8cwarea and volume on the cell’s processes is fcc):m3rr8 x2j wb8d z,(gkujlalse?

  Which statement best describes stef* jvul c3a)wy) -s1xcm cells?

  Which is a correct description of the celh wqr h1)nw y2k) 0g7bf,*nfcfl type adapted for gas exchange in the lungs?) qfn*1wbcn)y,7h0wr ff kg2h

  Which of the following explains the limitations on cevwt sj5z4j 2sx qhh4 nr(8yw.1ll size?

  What is this cell's most likely primarfvdyo o3p/.1 :jctsi v*t0g4 jy function, and where could it be located i1 ojsy p ftvjtcg4o/0d.*3iv: n a mammal?

  Which of the following characteristics of type I pneumocytes contribute to incr3z9wgx-gjj;e63tn ze easing the rate of gas zge-njxw 9tj;3g6ez3 exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow trans(ab8trgbaoav w/f6v0k2u8 g6y gy m 5:plant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient receiv: u66gwt ygv08kob8/vy2br am( fg5 aaed?

  Based on the Venn diagram, which identifies cardiac muscle cells and strivqi1 jfqbp2y(p s6 q(uqibx0 .n13kwk1rsv74ated muscle fibreb1sj(1y7 x( i iw p2pfskb.1rv4qvuq qk6qn3 0s?

Below is a diagram of a motor neuron. Neurons arel.ih4k+vl kbqz): y 9n the longest cells in the human :bv k)9knyzlh.4l qi+body.
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,pr7e-.eir , vu which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below show,ei-rrpu e.7 vs 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 stemq jw9j:+6cxbj mu ,y6i cells are not used in the treatm,jw 6:jicxqy9 mjbu6+ent of leukaemia?

  The table shows the diameters of red blood cells0/ nocp kr4ip6; v bn5w1e9nss from different organisms. Which red blood cell will hav9npo1k; bnvn0ic6s 5rse/w4p e the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lini.php ;xgy8pk2fm9e c5rc7rr7ng the proximal convoluted tubule make these cells more adapted to the functions they m2kf r7yp8x c 9pgcr.h5rp7e;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 speciali7 ;a4kefajmr8oe(zd 2,eyl 0 ysed cells is/are not tru(8j4ry;eefk a dm2aoe zy0 7,le?

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 followingv(x imii,l,oyri5j. +m sz; 1a is the correct order from smallest to largest? a,mo im.vr,s xzjii(ly5i1;+

  Which row in the following table gives the correct disadvantages of the differe9ul mcj 11u18jw1dh kab 3v0zunt stem cell sources for therapeutic us wz1v9c03duubu8 al 11j1hjmk es?

1.Describe how the use of stem cells mayte6dyda i5uk 24iw1 w0q. th2y be used to treat type I diabetes in the futueautw k4td 5y62dy.2 hi1q iw0re.

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 speciztcpn2-qa bl: ;t*5 pvalised 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.