Anatomy - Bones, muscles, nerves, organs, systems

Q1: A medical student needs to count the total number of vertebrae in different spinal regions. Following the 'Breakfast-Lunch-Dinner' mnemonic, the cervical region has {{1}} vertebrae, thoracic has {{2}}, and lumbar has {{3}}.

Q2: A biology student correctly identifies that signals travel from receptors in the skin TO the central nervous system for processing. What is the technical term for neurons that carry signals in this direction?

Q3: What is the name for the specialized cell junction between cardiac muscle cells that allows electrical signals to spread rapidly?

Q4: A neuroscientist studying action potentials explains that during depolarization, the inside of the neuron changes from {{1}} charged to {{2}} charged as ion channels open.

Q5: 🩺 A patient's blood test shows low calcium levels. The endocrine system responds by releasing parathyroid hormone (PTH), which stimulates certain bone cells to break down bone matrix and release calcium into the bloodstream. Which bone cells respond to PTH by increasing bone resorption?