The Nervous System and Reflexes

What are the two organ systems humans rely on for communication within the body?

• Skeletal and Immune systems

• Digestive and Muscular systems

• Nervous and Endocrine systems

• Circulatory and Respiratory systems

What is the main function of neurons?

• To filter blood

• To carry oxygen

• To produce hormones

• To carry electrical impulses

What is a synapse?

• A muscle fiber

• A part of the brain

• A connection between two neurons

• A type of neuron

What makes up the central nervous system?

• Liver and Kidneys

• Stomach and Intestines

• Brain and Spinal Cord

• Heart and Lungs

What type of neurons carry information to the central nervous system?

• Motor neurons

• Reflex neurons

• Sensory neurons

• Interneurons

What do motor neurons do?

• Carry impulses to the brain

• Carry impulses to muscles or glands

• Filter blood

• Produce digestive enzymes

What is a reflex arc?

• A type of muscle contraction

• A nerve pathway for an unconscious reflex

• A pathway for conscious thought

• A voluntary action

What happens when an electrical impulse reaches the end of a nerve cell?

• It causes the release of chemicals

• It turns into a hormone

• It reverses direction

• It stops completely

What role do effectors play in the nervous system?

• They carry impulses back to the brain

• They can be told to contract or release hormones

• They generate electrical impulses

• They act as receptors for stimuli

What is detected by receptor cells in a reflex action involving touching a sharp object?

• Pressure

• Heat

• Light

• Sound