Which of the following statements aboxrt1x)qx rm 2*ut the effect of surface area and volume on the 1rtxr2 )x xqm*cell’s processes is false?

  Which statement best it- +nec:s+nrdescribes stem cells?

  Which is a correct description of the cell type adapted for gas exch fwkraw6.bdu9l3x3:g8y db7 vange in the f 3x u: 97y6a8wdwdkbg3brv.llungs?

  Which of the following exf:qz 3q(,o nsyplains the limitations on cell size?

  What is this cell's most likely primary function, and where could it be locatc. q3 8xuy jn/mywr,mr-rd/ 9ted in/,m9jd nr.3-wx8ct uyr/mry q a mammal?

  Which of the following char an1bkkc -*hmqj wgr; jsw9gtgpq-70 z; /m++yacteristics of type I pneumocytes contribute to increasing the rate of gas exchanggg/7rq;z90j--1b wky +mmqswckt+jg p *nha;e?
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 3-r t j7m7sk:qh6 year old. One of the functions of these cells is to produce red and jkr7h t7 -qms:white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac5.2olvmvn;d +f/jm nc muscle cells and striated musvf/nnc+oj; mld52.m vcle fibres?

Below is a diagram of a motor neuron. Neurons are the longest +1i 7ntovgaeie;r t7-xc3v-mcells in the human1 vmoi-e ia tc3-+r 7g;7nxevt 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 syndrome, whi/wkips7b 5 wmpbj s 7925hv+chch could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shcp hj5mwb52 bh/+ w7spv9s i7kows 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 ste,r,kgmtfn9a 2+a b3fl m cells are not used in the treatment of leu tnf fkbm9r 3l2ga,+,akaemia?

  The table shows the diameters of red blood cells from jnp (wl7 +;hqkdifferent organisms. Which red blood cell will have the highest surface area to;lqw nk (7p+hj volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proxi6l vbgj6 :kle-mal convoluted tubule make these cells more adapted to the functions they pe6e 6b-jgl:lvkrform.

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 ik j)aeh:3h4a cells is/are not true?h: 4a)heia3jk

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 op-z qg 5ql/3iprder from smallest to largest?5i - qp/3lpgqz

  Which row in the follow6 jyjve8 xv1c1qw5 ie.rd ik6/ing table gives the correct disadvantages of the different stem cell sources for ther8w/1 vek yvx6di5.j6 1iejrcq apeutic uses?

1.Describe how the use of stem cells may be used to tr dlh* k h,tf1kgk)/c2reat type I diabetes in the futhl2c kr/* gtd1, hk)kfure.

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 jcfjl7; x08yo5e iz3 ioh(,-z p akz.yspecialised 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.