Understanding Reflex Actions in Biology

Which of the following is an example of a spinal reflex?

• Blinking when an object approaches the eye

• Pulling your hand away from a hot surface

• Salivating when you smell food

• Sweating when it's hot

What type of nerve carries signals from the sensory receptors to the central nervous system?

• Motor nerve

• Sensory nerve

• Interneuron

• Reflex nerve

Which of the following is a conditioned reflex?

• Knee-jerk reaction

• Salivating at the sound of a bell after conditioning

• Withdrawal from a painful stimulus

• Pupil constriction in bright light

What is the primary function of motor nerves?

• To detect changes in the environment

• To transmit signals from the brain to muscles

• To process information in the spinal cord

• To carry blood to the brain

Which of the following is NOT a type of reflex action?

• Voluntary reflex

• Spinal reflex

• Cranial reflex

• Conditioned reflex

In a reflex arc, what is the role of the interneuron?

• To carry signals to the muscles

• To connect sensory and motor neurons

• To detect stimuli

• To produce hormones

Which of the following is an example of a cranial reflex?

• Blinking when an object approaches the eye

• Pulling your hand away from a hot surface

• Salivating when you smell food

• Sweating when it's hot

What is the main difference between a reflex action and a voluntary action?

• Reflex actions are slower than voluntary actions

• Reflex actions are automatic and involuntary

• Reflex actions require conscious thought

• Reflex actions involve the brain only

Which of the following best describes a reflex arc?

• A direct connection between the brain and muscles

• A pathway involving sensory neurons, interneurons, and motor neurons

• A loop involving only the brain and spinal cord

• A circuit that requires conscious thought

What is the role of sensory nerves in a reflex action?

• To carry signals from the brain to the muscles

• To detect stimuli and send signals to the central nervous system

• To process information in the spinal cord

• To produce reflex hormones