Question 3: Write short notes on the following. (a) Cytoplasm (b) Nucleus of a cell Answer: (a) Cytoplasm: It is a fluid that fills the cell and occurs between the plasma membrane and the nucleus. Cell organelles such as mitochondria‚ ribosomes‚ Golgi bodies‚ etc. are suspended in the cytoplasm. http://schools.aglasem.com/?p=2307 2/8 8/17/2014 NCERT Solutions for Class 8th Science Chapter 8 Cell-Structure and
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of that gets made or created in the nucleolus. * Nucleolus is a densely packed of proteins and ribosomal RNA where it is reproduced. It’s not membrane bound. * Endoplasmic Reticulum is viewed as bunch of tunnels. Then they lead to the Golgi bodies. Some ribosomes are attached to
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a) Using a human cell of your choice‚ describe how organelles work together to make and secrete a protein (LO1. AC 1.1) An epithelial cell in the thyroid gland‚ called a thyrocyte forms spherical follicles that produce a protein called thyroglobulin. This is a globular protein that has a functional role in metabolism. The protein is used by the thyroid gland to produce thyroid hormones; thyroxine (T4) is an example of one of the hormones created. Thyroxine is formed by iodine binding to tyrosine
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Prokaryotes are organisms whose cells lack a nucleus and membrane-enclosed organelles. Most prokaryotes are small‚ single-celled organisms that have a relatively simple structure. Prokaryotic cells are surrounded by a plasma membrane‚ but they have no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles differentiates prokaryotes from another class of organisms called eukaryotes. Prokaryotes and Eukaryotes are similar in their chemical
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Anatomy Outline Notes Exam 1 Developmental Anatomy – is the way anatomy changes over time in a single species -somites are segmental blocks found in embryos that form muscles & vertebrae etc. Comparative Anatomy – is the comparison of anatomies between different species. -all known vertebrates have common feature (skull & vertebrae): this leads to evolutionary theory. Hierarchy of Structural Organization -Body -> System -> Organ -> Tissue -> Cells -> Chemical/Molecular
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Human Physiology Packet #1 Slate Masunaga Period 6 Table Of Contents: Chapter 1 Vocabulary Chapter 2 Vocabulary Chapter 3 Vocabulary Did you get it Questions Chapters 1-3 (in order) Review Questions Chapters 1-3 Chapter 1 Vocabulary Anatomy: structure Physiology: function Transverse/horizontal: plane that divides body into superior/upper & an inferior/lower sections Sagittal lengthwise plane dividing the body into right & left sections Midsagittal/median: lengthwise
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Each hemisphere of the brain also has a cingulate gyrus part of the limbic system Limbic system includes cingulate gyrus‚ amygdala‚ and hippocampus Emotion‚ learning‚ and memory Cerebral cortex consists of sensory‚ motor‚ and association areas Association areas integrate sensory data into perception Motor outputs control target tissues The noradrenergic system originates from the locus coeruleus in the pons Its axons terminate through the brain disseminates noradrenaline throughout
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Introduction Genetics: the science‚ which deals with the principles of heredity and variation. Heredity: transmission of characters from parents to their off spring. Variation: Differences for various characters among the individuals of the same species. Types of variation: 1. Environmental and 2. Hereditary 1. Heredity variation: Variation observed among the individuals of the same species due to difference in their genetic constitution is termed as heredity variation. 2. Environmental variation:
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Chapter 46: Organization of endocrine control Two major systems evolved to communicate and coordinate body functions Nervous system Endocrine system Hormones are carried through the blod to distant target tissue where they are recognized by specific‚ high-affinity receptors These receptors may be located either on the surface of target tissue‚ within the cytosol‚ or in the target cell’s nucleus Once a hormone is recognized by its target tissue or tissues‚ it can exert its biologic action by
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OCR BIOLOGY UNIT F221 Blood tests 1. Put a band (tourniquet) around the arm to make the vein stand out 2. Clean the area around the vein with an alcohol based solution 3. Push a sterile needle‚ attached to a sterile syringe into the vein 4. Pull back the plunger of the syringe to suck the blood into the syringe 5. When the necessary volume of blood has been extracted‚ remove the syringe and needle‚ loosen the tourniquet and press a small ball of cotton wool over the
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