*NURSING > QUESTIONS and ANSWERS > TEAS 6 Test Study Guide for Science. (All)
Cell Cycle ● Mitosis = “daughter cell” exact replica o Interphase (G1, S, G2) o Prophase o Metaphase o Anaphase o Telophase o Cytokinesis ● Meiosis = “daughter cell... s” different genetic coding o Only happens in gametes* o 1st phase ● chromosomes cross over ● genetic material exchanged ● tetrads of 4 chromatids formed □ Homologous pairs of chromatids are separated and go to different poles □2 cells go through 2nd cell division □ 4 daughter cells with different sets of chromosomes ● Haploid : contains half genetic material of parent cell ● Zygote- controls cell differentiation Tissues ¾ groups of cells ¾ Muscle, nerve, epithelial, connective 1. Epithelial: (joined together tightly) ex. Skin 2. Connective: (dense, loose, or fatty) ex. Bone tissue, cartilage, tendons, ligaments, fat, blood, lymph □Protects & binds body parts a. Cartilage: cushions & provides structural support i. Fibrous b. Blood: transports oxygen to cells & removes waste / ALSO carries hormones & defends against disease c. Bone: (hard) produces red blood cells 3. Muscle: Support & move body a. Smooth b. Cardiac c. Skeletal 4. Nervous: ex. Brain, spinal cord, & nerves a. Neurons- control responses to changes in environment Organs ¾ groups of tissues ex. Heart = muscle tissue in myocardium; connective tissue in blood; nervous tissue for heart rate; epithelial tissue in membranes Organ Systems ¾ groups of organs 1. Integumentary (Exocrine system) a. Skin i. Sebaceous glands sweat glands i . Hair ii. . Nails b. Protection i. Protects body from pathogens c. Secretion i. Secrete oil d. Communication i. Sensory receptors send info. about pain, touch, pressure, and temperature LAYERS OF THE SKIN 1. Epidermis a. Most superficial layer of skin b. Epithelial cells **Does not contain any blood vessels c. Stratum basale i. deepest portion i. . single layer of cells i i. keratinized 1. waxy protein waterproofs skin 2. Dermis a. Mostly connective tissue b. Blood vessels, sensory receptors, hair follicles, sebaceous glands, sweat glands 2 [Show More]
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