Which of the following statements abo;xfp daw +x2:) 8dqvbsqbm8h61kmvm:ut the effect of surface area and volume on the cell’s processes is falsx va1:mdwqd h f86+mbsvb)2k;x qpm:8 e?

  Which statement best describesyju (v;r8.w cvibr+)l stem cells?

  Which is a correct description of the cell type adapted for gas exchangetx z4w7pci(g l:)lhv) in the lungs?lg(p)t 7v ci):4lzwxh

  Which of the followi)gu y u7f;zt jh0qhroy0hh:7p- *xbc-ng explains the limitations on cell size?

  What is this cell's most likely primary function, and where could it be located 8:kxjb gn1(x5brswp 1in(w:bxkpsjb1xr81gn 5 a mammal?

  Which of the following characteristics of type I pneumocytenv(wd+)i6r,su*qm r y*xi wp;s contribute to increasing the rate of gas exchangeqdny;wsw,rp+**im)u (x vi 6r?
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 yea./uq(.k i hpjyr old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells u kqhyj/i..p(has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle celnnkam*/ 8usta.hehj xuo9s -l 5;9a * k3y-aulls and striated muscle fibres?ah 9; ytmlu 9.k5*a3uajxe n*sa/ 8n--okhlu s

Below is a diagram of a motor neuron. Neurons are tdhbjm u47f )nerl6 */ntg ,av(he longest cells in the human bu)r annmv fe46gt 7(dj l/,bh*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 infantmo2 ii h23ylv8 respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram be i3lvy 22moi8hlow 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 rea64(m q8: wibk4gffhl9 nxwj9rson that embryonic stem cells are not used in the trg4iw4b:r6x jf 89flhkqn(9wmeatment of leukaemia?

  The table shows the diameters je8q6y7aau+p of red blood cells from different organisms. Which red blood cell will have the +p8qyaja e7 6uhighest surface area to volume ratio?

1.Explain how the shape of eryth 6g5 oukn/7dkprocytes and cells lining the proximal convoluted tubule make these cells more adapted to theup5o /kngd6k7 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 and specialised cells is/aret:x e +u25vm89lvrtns not true? st8 lvxrtu e:nm5v2 9+

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 4vfj:zz nf/-wis the correct order from smallest to largest?f-z 4njwf: /zv

  Which row in the following table gives the correccvoipk:l. w3 ,t disadvantages of the different stem cevw ,:koc.3 lpill sources for therapeutic uses?

1.Describe how the use of stem cells may be used to ty3sda: gf)tbh8 8x(ffreat type I diabetes in the futureff xhtayb :38 fs)8g(d.

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 scu q)u+ud q5rsb m gme.i0)v*7nale).

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

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