Unlocking Cellular Structures: The Power of Electron Microscopy

Abstract

Course Code Instructor’s Name Due Date Question 1 Organelle Function Nucleus Contains genetic material, controls cell activities Mitochondria Generates ATP energy through cellular respiration Endoplasmic Reticulum (ER) Synthesizes and transports proteins and lipids [Name] Modifies, packages, and transports cellular products Lysosomes Contain enzymes for intracellular digestion Ribosomes Synthesize proteins from RNA templates Cell Membrane Regulates the passage of substances in and out of the cell Cytoplasm Houses organelles and where cellular activities occur Vacuole Stores water, nutrients, and waste materials Question 2 The respiratory system comprises various tissues, each serving specific functions facilitating the exchange of oxygen and carbon dioxide. These tissues include: Epithelial Tissue: The lining of the respiratory tract, including the trachea, bronchi, and bronchioles, comprises ciliated pseudostratified columnar epithelium. This tissue helps to trap and remove foreign particles from the air(Frechin et al., 2023). Connective Tissue: Connective tissues provide structural support and elasticity within the lungs. Elastic fibers allow the lungs to expand and recoil during breathing. Smooth Muscle Tissue: Smooth muscles in the bronchi and bronchioles control the diameter of airways, regulating airflow and air resistance. Nervous Tissue: Nervous tissue in the form of neurons and sensory receptors is found in the respiratory system. These help control involuntary breathing reflexes and provide sensory information regarding oxygen and carbon dioxide levels. Blood Vessel Tissue: Blood vessels in the lungs, such as pulmonary arteries and capillaries, facilitate the exchange of gases between the bloodstream and alveoli. Question 3 Essential Part of an Electron Microscope Electron Gun: The electron gun generates a beam of electrons. It releases electrons from a heated filament, forming a focused electron beam that will be used for imaging. Condenser Lenses: These lenses focus and shape the electron beam, ensuring it is appropriately directed onto the specimen. They play a crucial role in controlling the intensity and convergence of the beam. Specimen Stage: The specimen stage holds the sample under examination. It can be adjusted to position the specimen precisely within the electron beam for imaging. Objective Lenses: These lenses further focus the...