Which of the following statements about the effect of surface ardw hm 8kp8v(b*ea and volume on the cewdp (88h mkbv*ll’s processes is false?

  Which statement best describeqh) fkfp, g/+js stem cells?

  Which is a correct description of the cell type adup2 6fcrdj*j4ql26 lc(uf.fr(h a0 rwapted for gas exchange in the h (qr*dfpru w.juj4lr22c0f66cl( f alungs?

  Which of the following explains hv c8( st 3y+isbgm/,hthe limitations on cell size?

  What is this cell's most likely primary function, and where could it be lo19 8z c6c yf(h3jkjvivcated in a mam3hyj v9f1viczk6j8 c(mal?

  Which of the following characteristics of typemc;ts- ,6 wrxu I pneumocytes contribute to increasing the rate ofu ;mcsw,rx- 6t 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 marrow transplant from a 36 year old. One of the +xt8 qr+;tpvvp +f9mufuncti+qpxut;f +t8 pvrv+m 9ons of these 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 car9i2 rc:9 ob:6ocdf d lgfpns6*diac muscle cells and striated mu:dg:o2fds*9icf n696 clbproscle fibres?

Below is a diagram of a motor neuron. Neu aj tcr3m(+bm;rons are the longest cells in the human b ab;t+(mr m3jcody.
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 dist i85x).kuc *bsu kbvxmx7er9+ress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveuu bcse 8kb m*xv+97ixkr).5xoli. 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 stem cells m 37 i jend ihu.l+a.).pxci2k:mc4po are not used in the t lx4 ie 7h:a.+.)k3.cjou2ndi mpi cpmreatment of leukaemia?

  The table shows the diameters of red blood cells from different organisms ik/fj-,xwp3(+zmnkc . Which red blood cell will have the highest surface area to vo kk+3 ,x/imnczp(- fwjlume ratio?

1.Explain how the shape of erythrocytes aw(k 2uq )chxpa;rcbtsa061. wrtt5+ snd cells lining the proximal convoluted tubule make these cells 021qwax( crh c tsk); a .trbw+st56pumore 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 embryooxv5s v92 bj9dald) /unic stem cells and specialised cells is/are not true? lo)v2/a x9sd d5v9j ub

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 largq. aqu:-*hcg-a .qe vrest?:cu*- arqq.a-. hve qg

  Which row in the following table gives the correct disadvantageq 0mrswh pwg11o0;-oes of the different stem cell sources for therapeutic uh-0;prw1 oq w1o0emsgses?

1.Describe how the use of stem cells may ;8afm pc bcg*-be used to treat type I diabetes in the f -gbpaf;8m*cc uture.

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 obc*;t 8zhof1si :q un.l e/;ief 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.