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Bio - Unit 2

Bio - Unit 2 - Exchange and Transport, ENergy and Ecosystems

QuestionAnswerAnswer2
Blood Vessels blood vessels carry blood between the heart, different tissues, and organs of the body. three types of blood vessels: arteries, veins, and capillaries (blank)
Double circulatory system consists of: 1. systemic circulation->blood pumped (from left side of heart) to various tissues & organs, and 2. pulmonary circulation->where blood is pumped (from right side of heart) to the pulmonary cappilaries of the lungs exist in mammals
Myocardium thick, muscular layser which the wall of the heart contains, consists of cardiac muscle
coronary arteries arteries that supply the heart with oxygenated blood (blank)
aorta largest artery in the body which has its origin at the heart->gives off branches to the extremities, neck and major organs for the purpose of supplying oxygenated blood. (blank)
myogenic unlike striated muscles, cardiac muscles are SELF-EXITING (blank)
the cardiac cycle consists of: 1. atrial systole->contraction of the Atria, 2. ventricular systole->contraction of the Ventricles, 3. complete cardiac diastole->relaxation of hte Atria and Ventricles (blank)
diploid cell with a full set of genetic material->has one chromosome from each parental set. The diploid human genome has 46 chromosomes
gametes (eggs and sperm) ->contain a single set of chromosomes (haploid). (blank)
homologous Having the same evolutionary origin but serving different functions; "the wing of a bat and the arm of a man are homologous 2 homologous chromosomes share following characteristics: 1. same lenght, 2. same position of centromere, 3. contain same No of genes, 4. same linear order of genes.
Synapsis homolougus chromosomes that pair up precisely along their lenght. this process is known as synapsis and occurs during meiosis in prophase 1. (blank)
Chiasmata members of of homologous chromosomes , the chromatid pairs seem to repel and attract each other->at points of attraction, non-sister chromatids break and rejoin at exactly corresponding location.->known as crossing over formation of chuasmata. (during prophase 1 of meiosis?)->more than one can form
Gametogenesis process which results in the formation of fametes (special form of cell division->meiosis, in which the No of chromosomes is halved) (blank)
Spermatogenesis begins at puberty and continues through life.-> (blank)
Spermatognia => sperm cells->divide by mitosis->which give rise to further speratogonia (blank)
Created by: 1sabelle
 

 



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