endocrine system

• Thyroid-stimulating hormone (TSH) targets the thyroid gland and stimulates the production and release of thyroid hormones.
• The hypothalamus helps maintain homeostasis in the body through feedback mechanisms.
• The hypothalamus regulates body processes related to hunger, thirst, sleep, body temperature, and metabolism.
• The thyroid gland is located at the base of the neck.
• Thyroxin (T4) and triiodothyronine (T3) are produced by the thyroid gland.
• Calcitonin, which regulates calcium levels, is also produced by the thyroid gland.
• The hypothalamus secretes TRH, which travels to the anterior pituitary via the hypophyseal portal system and binds to receptors on TSH cells.
• Hypophysis is also known as the pituitary gland, which secretes various hormones that regulate growth, metabolism, reproduction, water balance, blood pressure, and stress response.
• Pituitary gland has two parts - anterior lobe and posterior lobe
• The pituitary gland is located at the base of the brain and secretes several hormones that regulate various bodily functions.
• The anterior lobe of the pituitary gland produces growth hormone (GH), prolactin (PRL), adrenocorticotropic hormone (ACTH), follicle-stimulating hormone (FSH), luteinizing hormone (LH), thyrotropin (thyroid-stimulating hormone; TSH), and melanocyte-stimulating hormone (MSH).
• Calcitonin is secreted when blood calcium levels increase.
• Calcitonin is produced by the thyroid gland and lowers blood calcium levels.
• Parathyroid hormone (PTH) is released when blood calcium levels decrease and increases blood calcium levels.
• Parathyroid hormone (PTH) increases blood calcium levels.
• epithelial tissue functions as protection, secretion in the glands and skin, and absorption in the intestine
• muscular tissue is made up of muscle cells and is responsible for movement and contraction
• smooth muscle is found in the walls of blood vessels and the walls of the digestive tract
• smooth muscles moves something connected to you
• skeletal muscle is attached to bones by tendons and allows us to move our body parts
• adipose tissue stores fat and insulates the body from heat loss
• connective tissues are fibrous connective tissue that provides support and strength to organs and structures
• connective tissues are fibrous connective tissue that binds organs together and supports them
• cartilage is a tough but flexible connective tissue that covers joint surfaces and forms part of the skeleton
• blood is a fluid connective tissue that transports nutrients, oxygen, waste products, and other substances throughout the body
• cardiac muscle is striated and involuntary, and is found in the heart
• cardiac muscle pumps blood into the heart
• smooth muscle is non-striated and involuntary, and is found in walls of hollow organs such as stomach and intestines
• muscle contraction occurs when actin filaments slide past myosin filaments
• myofibrils are made up of sarcomeres which contain thick (myosin) and thin (actin) filaments
• the sarcoplasmic reticulum stores calcium ions
• troponin binds to tropomyosin on actin filament
• calcium ions bind to troponin on actin filament, causing tropomyosin to move out of way so myosin can attach
• tropomyosin blocks attachment sites on actin filaments
• calcium ions bind to troponin on actin filament, causing tropomyosin to move out of way so that myosin can attach to actin
• calcium ion binding causes troponin to move out of the way so that myosin can attach to actin
• ATP provides energy for cross bridge formation between actin and myosin
• connective tissue stores energy in fat cells
• tissues are a combination of a group of cells made for a specific function
• organ is an organized collection of tissues working together to perform a particular function