Bio 201 Rio Salado Exam 1 Questions And 100% Verified Solutions

Bio 201 Rio Salado Exam 1 Questions And 100% Verified Solutions Four Abdominopelvic Quadrants - ANSWER -1) Right upper Quadrant 2) Left upper quadrant 3) Right lower Quadrant 4) Left lower quadrant Structure of the Generalized Cell - ANSWER -Cell membrane, cytoplasm, nucleus, endoplasmic reticulum, ribosome, golgi body, mitochondrion, lysosome. For picture refer to page 66. Epithelial Tissue (Simple squamous) - ANSWER -Description: Single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm. Simplest of the epithelia. Function: Allows passage of materials by diffusion and filtration. Secretes lubricating substances in serosae -Forms walls of air sacs of the lungs and lines blood vessels -It contributes to Nervous Tissue Characteristics - ANSWER -Description: Neurons are branching cells cell processes that might be quite long extend from the nucleus-containing cell body. Also contributing to nervous tissue are non irritable supporting cells. Function: Transmit electrical signals from sensory receptors and to effectors (muscles and glands) which control their activity. Location: Brain, spinal cord, and nerves Skeletal Muscle Tissue - ANSWER -Description: long, cylindrical, multinucleate cells; obvious striations Function: voluntary movement; locomotion, manipulate of the environment; facial expression; voluntary control Location: in skeletal muscles, attached to bones or occasionally to the skin Cardiac Muscle Tissue - ANSWER -Description: branching, striated, generally uninucleate cells that interdigetiate at specialized junctions Function: as it contracts, it propels blood into the circulation; involuntary control Location: walls of the heart Smooth Muscle Tissue - ANSWER -Description: Spindle-shaped cells with a central nuclei ; no striations; cells arranged closely to form sheets Function: propels substances or objects along internal passage ways; involuntary control Location: mostly in walls of hollow organs Cutaneous Membrane - ANSWER -skin, organ system consisting of a keratinized stratified squamous epithelium firmly attached to a thick layer of dense irregular connective tissue Mucous Membranes - ANSWER -lines body cavities that open to the exterior, such as those of hollow organs of the digestive, respiratory, and urogenital tracts (they are usually wet or moist) Serous Membranes - ANSWER -moist membranes found in closed ventral body cavities. consists of simple squamous epithelium resting on a thin layer of loose connective areolar tissue Analyze the changes that occur in tissue from embryonic development throughout a person's lifetime. - ANSWER -First event of embryotic development is primary germ layers (ectotherm, mesotherm, and endotherm). -They then specialize to form the 4 major tissues by second month of development. -division of nerve cells stop during fetal period. -only epithelia and blood-forming tissues are highly miotic. -with age, epithelia thins breach prone, tissue repair and circulatory system is less efficient -More DNA mutation = cancer. melanin - ANSWER -protects the keratinocytes nuclei from the damaging affects of UV radiation sweat glands (sudoriferous) - ANSWER -thermoregulation eccrine sweat gland - ANSWER -produces true sweat; abundant on the palms of hand, soles of the feet, and forehead 11 Organ systems of the body (major functions) - ANSWER -1) Integumentary System- Forms the external body covering. 2) Skeletal System- Protects and supports body organs. 3) Muscular System- Allows manipulation of the environment, locomotion, and facial expressions. 4) Lymphatic System- Picks up fluid leaked from blood vessels and returns it to the blood 5) Respiratory System- Keeps blood constantly supplied with oxygen and removes carbon dioxide. 6) Digestive System- Breaks down food into absorbable units that enter the blood for distribution to body cells. 7) Nervous System- Fast acting control system of the body. 8) Endocrine System- Glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use. 9)Cardiovascular System- Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients , wastes, etc. 10) Urinary System- Eliminates nitrogenous wastes from the body. 11) Reproductive System- Overall function is production of offspring. Negative and Positive Feedback Mechanisms - ANSWER -Negative Feedback Mechanisms- In these systems, the output shuts off the original stimulus or reduces intensity. Examples: Regulation of body temperatures; Withdrawal Reflex in which the hand is jerked away from a painful stimulus such as a broken glass; As blood volume drops, the hypothalamus of the brain is stimulated to release ADH to the blood.