Which of the following statements ks) ) 3d8ma8wvrcgg5 sabout the effect of surface area and volume on the cell’s processs 3 da)wv88gr)5kmsgces is false?

  Which statement best describes stem 7t(njtz:*(2gntpr ) oth zwe,cells?

  Which is a correct description of the cell type srio7s99:y 4bdb qhl5adapted for gas exchange in the lur7s4o9 dbyq:5h lb i9sngs?

  Which of the following explaa)d ,kj(:vssf bs7)skins the limitations on cell size?

  What is this cell's most1phpof h/h0ktp3w0 ne;+rgc * likely primary function, and where could it be located in a mammal?n/+w0tchhrg;ekp f3*p o1 hp0

  Which of the following characteristics of type I pneumocytes contribute toab5t gq)w-q9:f d3n tpl,d7zfzfi2) y increasing thez2lfqf g3-z fd t)pb:i, dy7w9at5 n)q 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 a bone marrow tra ,gk ta+0-g*; yblkyg d95adyxnsplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What ty*kkayg-59 d dlg+yx bg,0a;yt pe of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cely:2g mmcpucry pj(*9/3mbrz076 csbu ls and striated mu* 6sup ccb jr:3/gmy7 mbcup2ym( zr90scle fibres?

Below is a diagram of a motor neuron. Neurons are the longest cells in the humm7;jvc1b g/:ieum )yoan body oui;)1cmy/e mbjv7g:.
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 distressy7cjcsh -i-,fx v m2z( syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli -y7sfc,i vmzx(chj-2 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 tfmsa7q, h pq 4q65v ci+r,sq tk*cp4g7hat embryonic stem cells are not used in the treatment of leuctpq kvm5 ,s+,*sh 474qg7 iacf6qrqpkaemia?

  The table shows the diameters of red blood cells from d on7h(dp 1)e3thapx0ro1j pf0 ifferent organisms. Which red blood cell will haa7p oj0t dp1p(o3x)0eh1nh rf ve the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining r z+s k t-pnnjg8vm5,ydf;fd:1 izwb4:c/u8s the proximal convoluted tubule make these cells more adapted to the functions then+g ;/ 1:ztmyffz,idu:854 rwjsbscdk-8pn vy 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 emb kz+dewmxs434 t h::bnryonic stem cells and specialised cells is/are not tru4xs4 h:b+z n3tdew:k me?

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*ax .gvg,mto0 1.a pnm is the correct order from smallest to largest?n0ot.p m1gm va, ax*.g

  Which row in the following table gives the correct disadvantages of thgow1a:kq (3 cge different stem cell sources for thera:q o 1cw(3gkagpeutic uses?

1.Describe how the use of stem cells ma peko13teo,p9-u o0gr y be used to treat type I diabetes in the futt1eo3po9k uog0-rpe, ure.

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 sc i9 ,t xsoc7k7hq5- vlacp-m6xale).

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

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