Which of the following statements abouhyd uppz* nj( u4we)7mi 6c4u/t the effect of surface area and volume on the cell’s processepnjmw)/ 6y4(4u c pdue*hi7 uzs is false?

  Which statement best describes stem cells?sz9vyl 8;rcgq: 83cbu

  Which is a correct description of the cell type adapted lvqrg+r uk -tne up)+*:3kb4qfor gas exchange in the lun-:rluk3qu *+ nr) qk+vpt4bg egs?

  Which of the following explains the limitations on celu7 b9 6lcbys3vl size?

  What is this cell's most likely p4lm,7 aeav. lzrimary function, and where could it be located in a 4.le,7vzlmaa mammal?

  Which of the following characteristics of type I pneumocytes cf0tznp1-v ngnr *z3c1ontribute to increasing the rate of gas e-1rfvg1*z zn3t0 cn pnxchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bon(ct hh cu8t)5ks(8yyl e marrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What 8s c8uhtlk)5ty( (cyhtype of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac mulillab7 gfcc jx 5 )i.b1eubl2 :3fi:8scle cells and striated muscle fibres.xell32b1u8la ci )cb: j:fi5i g7blf ?

Below is a diagram of a mw1poj kv4; u- :8e+od;eans bmotor neuron. Neurons are the longest cells in the human bodke+bou ;s: n18admwe;po4 v-jy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies someti.u-y9b dijm+ bl.7ni,; 1gj8nzse btimes suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The dia7z;j.ti gleb, uid-1j ibn+sm .n8yb9gram 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 followifdf kp*j4doxbtw (j0;i /-fe 8ng is a reason that embryonic stem cells are not used in the treatment o/ 80dj tdj-;e4xbff (fki ow*pf leukaemia?

  The table shows the diameters of red bloomf:p. npxuu3qep)* h+ d cells from different organisms. Which red blood cell will have the highest xf*m qn u3up h+).pp:esurface area to volume ratio?

1.Explain how the shape of erythrocytes and cells 7x-.v kv9oymmlining the proximal convoluted tubule make these cells more adapted to the functionsv vyo7m9-xmk. 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 s e1(nrmf7w4 bgjz2o2zq/ + naetem cells and specialised cells is/are not true?g 1o2qna4 jf+zw7meb( znr2 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 order from smallesczx wig)2 2ja /zmf4h4t to largest?fg4/xia z4h 22 )jmwzc

  Which row in the following table givesdgd9nn+v +,viup* f8 h the correct disadvantages of the different stdh8 dip n v*9n+v,f+ugem cell sources for therapeutic uses?

1.Describe how the use of stem cells may be used to treat type I diagw3cm e46y) afbetes in theyag)4w3 ef 6cm 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 specialiseujow1nu p .x66d 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.