Which of the following statymi;s.pyd9 ec.,v 0vyements about the effect of surface area and volume on the cell’s processes i9;.eysm 0iyp yv ,.dcvs false?

  Which statement best describes stem cells?z84 .bryv+ rxg

  Which is a correct description of the cell type adapted for gas e 0+mefc/ijo .jxchange in the lunge j.io+mc 0/jfs?

  Which of the following explains the limitations on celjrff:-qb3:w k tgi.qb, )6efy l size?

  What is this cell's most likely primary function, and where could it).mlgmmtgttp+ 3c pz.*) r zr2 be located in pgrc lrtm *.mzt ) tm32.pz+)ga mammal?

  Which of the following characteristics of type I pneumocytes contc c4(9ywnww5:(p(e qtbo )l :(cqglpje d-o8wribute to increasing the ratew8n:) 5ccp gl(9(ewb4pdt oq(q yojewc l(w-: 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 marrocc7tq.k a(9iil ta+u:3we v.ew transplant from a 36 year old. One of the functions of t93. c.c(:e7vq+ iakaweutltihese cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiaer h27ju-0xni c muscle cells and striated mus2hji e-ur07nxcle fibres?

Below is a diagram of a motor neuron. Neurons are the longest cells in the humihl m.v f:qcrr4g6/qnn t1;*x an bxvq *l; rmiqg/6cr . htnn41f:ody.
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, whi)ou4 b8d;hnv kgp, 3gach could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The dn4h;d 3g) 8 ugvp,abkoiagram 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;64uuxgwyhsda( o * p. stem cells are not used in the treatment of leukug 4a.h s;xuow*p6yd(aemia?

  The table shows the diameters of re juopgng 7jcq;b/*+r5 sl;3g v sy*c:ad blood cells from different organisms. Which red blood cel*bcgqsns jyg u5; :+l;3ov*ra7 j/cpgl will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocx yl/v 1b/y ((-t0xcymrhtlt5ytes and cells lining the proximal convoluted tubule make these cells more adapted to the functionlyv t0yx51t(xrl h(/by-m /ct s 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 mtg1+ :7h dne:dzkcm+cells and specialised cells is/are not trungk:+h1ze: 7m cmd+td 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 tueqj.e zw08 2uhe correct order from smallest to largest?ujuw2eq.e z 08

  Which row in the follow44s x2n xh7w.j f:ewfding table gives the correct disadvantages of the different stn xhfwxew7s4:fd.j 42 em cell sources for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type Ia/4x pi+ defcmnp l34/ diabetes in thei+e 44 nlfp/m3 ax/dcp future.

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 s2h0 hv uqq+06s:pjaj 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.