Which of the following statements about the effect of mc,wplx:)5k t- aale+surface area and volume on tp5 l , :+-atlcea)xkmwhe cell’s processes is false?

  Which statement best describes stemlqsydt:ce sd (ytt-n (1p564t cells?

  Which is a correct desm,y,jq;8q l mlyp 0+xvbr6q3scription of the cell type adapted for gas exchange in the lunqql 3rxs ,0mqj mlp6y;y,bv+8 gs?

  Which of the following explains the limitations on cell 7jwl5y x gk+ivmtkpl9gl(o-, ef, 4u8 size?

  What is this cell's most licm. k6ndo+tv 6uf:4 gl1n9h dmkely primary function, and where could it be located in a mammal46lfgc+khn.mo:udnv 91 6 mdt?

  Which of the following characteristics of type I pneumocytt/ l5p2h 9 y4v8dcpguwes contribute to increasing the rl4/wdcu2tphp v 89y5gate of 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 9ch)6+bh sioq(rnqf 2transplant from a 36 year old. One of the functions of these cells is to produc hqorhiq( bc+2fn )s96e red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagrxgg+jaa qi +5w35ru7bam, which identifies cardiac muscle cells and striated muscle fibres? x rbg7+qjua 5+wgi35 a

Below is a diagram of a motor neuron. u+ ov) 1w vdz:2fw)xzwNeurons are the longest cells in the human body. uf2vzo +) dzxwwv: w1)
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 synj)q v+0)nhcvo qu6dn9 drome, which could be cauvc)nv+h )qdq0njuo6 9 sed 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 is a reason that embryonic stem cells are not usedv n:6nep l/e5tms6e27yf6wrc in the treatmennw e m/eyv 6cl7nrt6:2 65pfset of leukaemia?

  The table shows the diameters of ree: n .g2tg+f-l/ic w5nms:x psd blood cells from different organisms. Which red blood c s:fs-ln/it+5xnw: .g2ep gmcell will have the highest surface area to volume ratio?

1.Explain how the shape of.k1g,e ljgl uxnj-f88 erythrocytes and cells lining the proximal convoluted tubule make these cells more adapted to the functions they perform. -l.uk jj81,enx flg g8

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/are not t,zg c:s3 zcd2:p:l3gs-tpm-wlcn . a 2/ ujkvprue?ljtp c sdp 3c ,-kazmw2ngu- cvs3/::g :l.p2z

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 fd8 i/ gta6:iiz)d( jdjollowing is the correct order from smallest to largest?i(jid6dg j8azt/d: i)

  Which row in the following table gi lvq7n b6qe (:zczsk9k*i:4bcu o2y*fves the correct disadvantages of the different stem cell sources fo i zcz*qb7ysul *k9eb:fv c4k6o(n:2qr therapeutic uses?

1.Describe how the use of stem cells may be used to uh7 +g8tk cph rm29*gltreat type I diabetes in the 9rg8p2 *htgkc uh+ml7future.

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 sc97ks.rqy6p dlale).

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

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