Anatomy - Bones, muscles, nerves, organs, systems

Q1: You accidentally touch a hot stove and instantly pull your hand back before even thinking about it. This rapid reaction involves signals traveling from your hand to your spinal cord and back. What type of nerve carries the "ouch, that's hot!" message TO your spinal cord?

Q2: When you bend your elbow to lift a book, your biceps muscle contracts and gets shorter. At the same time, the muscle on the opposite side of your arm must relax. What is the name of the muscle that relaxes when your biceps contracts? A. Deltoid B. Triceps C. Quadriceps D. Hamstring E. Pectoralis

Q3: A biology student examines three muscle samples under a microscope. Sample A has visible stripes and is attached to bones. Sample B has stripes but forms the walls of a hollow organ that pumps continuously. Sample C has no stripes and lines the digestive tract. She can voluntarily contract Sample {{1}}. Sample {{2}} is cardiac muscle found in the heart. Sample {{3}} represents smooth muscle.

Q4: Your friend says: "I'm going to the gym to work on my bones by lifting weights." What should you tell them about what they're actually strengthening?

Q5: A doctor is explaining to a patient why their broken rib is dangerous. The rib is part of the skeletal system. What are TWO specific organs that ribs protect? A. Brain and spinal cord B. Heart and lungs C. Stomach and liver D. Kidneys and bladder E. Pancreas and spleen