Top of Form . The Male Reproductive System > The Male Reproductive System: Introduction The male reproductive system is composed of the testes‚ genital ducts‚ accessory glands‚ and penis (Figure 21–1). The dual function of the testis is to produce spermatozoa and hormones. The genital ducts and accessory glands produce secretions that‚ aided by smooth muscle contractions‚ conduct spermatozoa toward the exterior. These secretions also provide nutrients for spermatozoa while
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Definition/comparison questions Evolution / Selection Evolution is a slow continuous process of change that happens in plants and animals over a long period of time resulting in a change from simpler to more complex forms. This is the reason modern day plants and animals are different from those of past. The competition for resources will favour organisms with better adaptability and certain variations over others hence leading to change in the rate of occurrence of certain traits within that population
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Biology Major substances: Organic compounds – are compounds that contain carbon and were originally made by living things e.g. carbohydrates‚ lipids‚ proteins‚ nucleic acids Inorganic compounds – are compounds do not contain carbon as a main element Organic compounds | Composition | Function | Proteins | Carbon‚ hydrogen‚ oxygen and nitrogen | Used in the structure‚ storage‚ movement and transport of cells for growth and repair. | Lipids | Carbon‚ hydrogen and oxygen | Stores energy
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Exam 1 Study Guide 75 points total ~25 multiple choice questions‚ includes fill-in-the-blank‚ fill-in-the-table and matching 1 essay question‚ drawn from the possible essay questions below – 20 points Approximate chapter breakdown: 5% Lecture 1 – Introduction to Biology 5% Lecture 2 – The Scientific Method 20% Lecture 3 – The Chemistry of Life 25% Lecture 4 – Biological Molecules 25% Lecture 5 – The Cell 20% Lecture 6 – Cell Membranes Example Question 1. White blood cells are responsible
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1. Hemostasis Hemostasis is the first stage of acute wound healing. It is characterized by the formation of a primary plug to prevent any further blood loss and exposure to environmental pathogens. Once the tissue has been injured‚ the vascular and lymphatic vessels that are disrupted become constricted. The reparative coagulum is initiated as platelets adhere to the interior surfaces of the vessels as well as to a newly forming matrix of fibrin that together become the cruor of the thrombus‚ thus
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Review for Bio 103 Lab Midterm Read the lab manual and study your worksheets. Vocabulary: Metric system‚ percent error‚ systematic error‚ random error‚ accuracy‚ precision Cylinder‚ beaker‚ pippette‚ balance‚ meniscus Field of view‚ inversion‚ total magnification‚ depth of field‚ par focal Microscope parts: eye piece‚ body tube‚ arm‚ nosepiece‚ objectives‚ stage clips‚ mechanical stage‚ diaphragm‚ condenser‚ fine and course adjustments‚ light stage‚ base Protein‚ peptide bond‚ simple sugar
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Introduction to Biochemistry Biochemistry : a multidisciplinary science that explores the chemistry of living organisms and molecular basis for changes occurring in living cells. Principal areas of Biochemistry 1. Struture and Function of Biomolecules Based on structure depend the function (structure function relationship) Example: Hemoglobin S differs from regular adult hemoglobin (hemoglobin A) by just one single amino acid. A valine replaces a glutamine in the 6th position of the beta
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Notes on histology Histology Lecture 1 Histology is the study of tissues: in our case‚ it means study of tissues which make up the human body. Tissue is defined as a group of cells which perform a common function. All the cells in a given tissue are not necessarily identical or similar e.g. blood is a type of connective tissue but it has many different types of cells. However‚ tissue also contains two other components i.e. ground substance (or matrix) and fibres. Despite the complexity of
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such as ribosomes‚ before they mature‚ but these generally migrate to the cell wall and dissolve at maturity; this ensures there is little to impede the movement of fluids. One of the few organelles they do contain at maturity is the smooth endoplasmic reticulum‚ which can be found at the plasma membrane‚ often nearby the plasmodesmata that connect them to their companion or albuminous cells. All sieve cells have clusters of pores at their ends that grow from modified and enlarged plasmodesmata‚ called sieve
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DSD 251 Oral Biology and Histology 2 DENTAL PULP: (Origin-Functions and Anatomy-Histology Vascularity and Lymphatic supply –Nerve supply. Regressive changes of the pulp: fibrous changes pulpal stones –diffuse calcifications) DEFINITION : The pulp is a delicate mesenchymal connective tissue that occupies the pulp cavity in the central part of tooth. The normal pulp is pink‚ coherent soft tissue is noted‚ dependent on its normal hard dentin for protection. Dentin and pulp are embryologically‚ histologically
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