Which of the following statements about the effect of surface area and r:ic1fvhw.+w gnfa3 1volume on the cell’s p cg1+w3vfr i1f:ah. nwrocesses is false?

  Which statement best dvyvk zl9kk zd5 22;v1py3c qo3escribes stem cells?

  Which is a correct description of the cell tl ao6f+4kdfi.)h u( w*mwf*rg ype adapted for gas exchange in the lungs4a(. g6)+wkihwu**lmf odffr?

  Which of the followi5t4mc -rd vsaj05hhr1ng explains the limitations on cell size?

  What is this cell's most likely primary function, and where could w :vy)-if *ngc+khhq1 it be located in a mi q:+h1fg *ky)-ch wnvammal?

  Which of the following characte-3qicsw vcl;o7 wc1533 f4x c3ykgbuqristics of type I pneumocytes contribute to increasing the go1l7vcu yi xfq5-qws343bcw3c;c 3k rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives acwi q5 cv *k6 sktdqy5c/79+nr bone marrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells hasiwdqr q *+5 cytk7c5cns v9k6/ the patient received?

  Based on the Venn diagram, which identifies cardiac muscle czl y/ nquo+f+;hh .aow; .9kqpells and striated muscl..q;/kh;+h9a ulfo y+pzqo n we fibres?

Below is a diagram of a motor neuron. 9,avp vv jdw)ea l88p( ,hggpx.+zed. Neurons are the longest cells in the humanez,v.jw.9vga,pvex(d dp )a88 g l+ph body.
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 syndx (rf+rc.*js orome, which could be caused by a lackrsf*+r x jo.(c 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 is a reason that embryonic h7.ylt;fqrgxvwz3h9a4vm * 9stem cells are not used in the treatment;x.avh4m hql9 vw3zrg*fy97t of leukaemia?

  The table shows the diam1a - fo;xng wmi6a9p)aeters of red blood cells from different organisms. Which red blood cell will have the highest surf6max ogwip a9-a)f;1n ace area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal c flu9, bwizyybe 43.uy :m6c+ionvoluted tubule make these cells more adapted to the function4z:9biyuy 3.+mbycf w6 ul,ei 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 cells and specialised cells is/arfbn+f8wx 1f8j6rd zy0 q4d+tm e not tru+fxnb08 d6f8f4 qwdtmrjy1+ze?

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 tom wdxk. or/)8n nl10id largest?dn/o01)w rl8. minxdk

  Which row in the following table gives the corr(1 hqch* 7(ld 1sgabgzmme k7-ect disadvantages of the different stem cell sources for 7 (easgm*kb zdgq h-cmh(l711therapeutic uses?

1.Describe how the use of stem cells may be used to treat t,3efk: te w3koype I diabetes in the future.tko kfe3e,3w:

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 s56+4 ff+9bmg yzfm ahto 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.