TEAS 6 Science Practice Questions with Complete Rationales.

TEAS 6 Science Practice Questions with Complete Rationales What causes osteoporosis? - ANS: A disease that causes brittle bones fragile bones. A decrease in the osteoblast activity and normal osteoclast activity. Autonomic sympathetic system is responsible for what? - ANS: Regulating involuntary body functions such as heartbeat, blood flow, breathing, and digestion. Fight or Flight Response What is the function of a neuron? - ANS: To process and transmit information, creating electrical impulse What is the function of myelin sheath? - ANS: To protect the neuron, provide insulation, and increase the speed of impulse transmission Where are blood cells made? - ANS: Bone marrow What produces antibodies? - ANS: Plasma cells (differentiated from white blood cells called B lymphocytes also called B cells) A person who is sick may have? - ANS: Increase in white blood cells What attacks an antigen? - ANS: Antibodies What is an example of a disease where the immune system attacks itself? - ANS: Multiple sclerosis (autoimmune disease) What are the pores in the nuclear envelope used for? - ANS: Transport molecules between cytoplasm What organelle transports energy that comes from food? - ANS: Mitochondria What gland produces FSH? - ANS: Anterior Pituitary What gland produces TSH? - ANS: Anterior Pituitary What are the two major parts of the nervous system? - ANS: CNS/PNS (Central and Peripheral) What produces bile? - ANS: Liver Where is urine stored? - ANS: Bladder What is active immunity? - ANS: Vaccinations What is the job of the circulatory system? - ANS: To transport endocrine hormones. Bone Healing: formation: - ANS: 1. remodeling Hematoma forms. 2. Fibrocartilage callus formation 3. Bony callus forms 4. Bone remodeling occurs compact bone lay down Where does fertilization begin? - ANS: End of the fallopian tube Where does meiosis occur? - ANS: Ovaries Which of the following endocrine system glands is responsible for controlling an individual's metabolism? - ANS: Thyroid gland The parathyroid gland is an endocrine system gland located behind the thyroid gland. What does the parathyroid gland help the body control? - ANS: Calcium and phosphorous levels What does the body make when in the sunlight? - ANS: Vitamin D What method does the lungs use to diffuse 02 and CO2? - ANS: Simple diffusion against concentration gradient What protects the skin from UV? - ANS: Melanin Which hormone decreases glucose level? - ANS: Insulin Beta cell What happens when alveoli is damaged? - ANS: Can't provide gas exchange, may cause emphysema