Cardiovascular
What chamber receives blood from the vena cava?
Right Atrium
What are the two main divisions of the nervous system?
Central and Peripheral
Which blood component is responsible for oxygen transport?
Red blood cells (hemoglobin)
What type of molecules do endocrine glands release?
Hormones
How many bones are in the adult human body?
206
Which vessel carries deoxygenated blood AWAY from the heart to the lungs?
Pulmonary arteries
What is a synapse?
The gap between neurons where signals pass
A patient experiences clumping after receiving blood. What is this called?
What is agglutination?
What is the FIRST organ that performs BOTH mechanical and chemical digestion?
Mouth
What structure connects muscle to bone?
Tendon
Which nervous system division decreases heart rate?
Parasympathetic
What is the function of myelin?
Speeds up nerve signal transmission
Which line of defense includes inflammation?
Second line
A student observes chyme. In which organ is this occurring?
Stomach
What level of muscle organization contains bundles of muscle fibers?
Fascicle
Put in order: Vena cava, right ventricle, lungs, right atrium, pulmonary arteries
Vena cava → Right atrium → Right ventricle → Pulmonary arteries → Lungs
What happens during demyelination?
Signals slow down or stop
Why do vaccines work (What do vaccines create)?
They create memory cells for faster response
Blood glucose increases. What hormone is released and what is its effect?
Insulin → lowers blood glucose
What would happen if sarcomeres could not function properly?
Muscle contraction would not occur
A person stands up quickly and feels dizzy. Explain what happens involving blood pressure and heart rate.
BP drops → baroreceptors detect → HR increases to restore BP
Explain how a signal travels through a neuron.
Dendrite → cell body → axon → synapse
Why is O− considered the universal donor?
No A, B, or Rh antigens → no immune reaction
What is the main goal of negative feedback AND positive feedback?
Negative feedback → maintains homeostasis by reversing changes
Positive feedback → amplifies changes until a specific outcome is reached
Contraction happens in the ______ AND involves which structures?
Sarcomere → actin & myosin