Which of the following statqi*6 jhcke)l8ements about the effect of surface area and volume on th8ek6ihcl )q *je cell’s processes is false?

  Which statement best describes snfl;7q-0z7pf 0tw ilm ty*4or tem cells?

  Which is a correct description of l.gxg2 9)rw esr: 9agnthe cell type adapted for gas exchange in the lungg9axw n)e 9sr2:gr l.gs?

  Which of the following explains the l jsead*10 1rldimitations on cell size?

  What is this cell's most likely primaryi, 0mgludg +x. function, and where could it be located in a mammalg .mg0udxi,l+?

  Which of the following characteristics of type I pneumocytesm 9r5 ;o.ayskl.tn pk0p,5*yl mgmc7i contribute to increasing the rate of gas exchange9kc m0l l tpo5smy5k 7 i.;ma,g*y.nrp?
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 yeazf c4 9nx:rt.w;q6 zfc5soz: ar old. One of the functions of these cells is toasw69f fzxoc :.4qc 5: ;tnzrz produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which idenivt:7em va t91tifies cardiac muscle cells and striated musclvve1imt:a t 79e fibres?

Below is a diagram of a motor neuron. Ne u8j, wpq:kk3j j5o:sftb:b(mga +o0 burons are the longest cells in the human bodg:t+ u,jj3m j8b:q:o wb s pfkk05ao(by.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infayl fl2 n90q8fk/3hk tknt respiratory distress syndrome, whikkqh8f2l3fn 0 ytl /k9ch could be caused by a lack of sufficient surfactant in the pulmonary alveoli. 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 iex0uym;g(jd(3- e:k* deny wbs a reason that embryonic stem cells are not used in the treatm- (e;dgyjek: emd3wu(b*xy0 nent of leukaemia?

  The table shows the diameters ) iq;7els(nieof red blood cells from different organisms. Which red blood cell will have the highest surface area to volume ratiole 7) qi;(ines?

1.Explain how the shape of erythrocytes at8uqs; e.st(l gpkw76nd cells lining the proximal convoluted tubuet7kug st6p.8s;(qlw le 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 cell mv4.vtgc srbg5yv6, +.dfzo*)5c nbxs and specialised cells is/are not tru..yzvfdnc gx 45b6 g bvcrmsv)*5+ot ,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 the correct orde )u7aqqkaz)2tr from smallest to largest?)z aakqu2)qt7

  Which row in the following table gives the correct disadvantag4 xruv e/b8(40wesacz es of the different stem cell sou 4zebs( 4exra/u8cw v0rces for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type I diabetes in the,pa 5bxcbr2 6 jk)o+ie futur5)baie oc6bxk+rj2p,e.

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 to scale). *3vy(kyi0bd 9v9rt ih

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.