Synapse & Reflex Arc Quiz

What is the primary function of a synapse in the nervous system?

• To transmit electrical impulse directly between neurons

• allow the transmission of signal between neurons

• To store neurotransmitters

• To generate action potentials

Which of the following is NOT a component of a reflex arc?

• Sensory neuron

• Motor neuron

• Synapse

• Brain

Which of the following best describes the structure of a synapse?

• A gap between two neurons

• A continuous connection between two neurons

• A myelin sheath covering the axon

• A cell body of a neuron

Why are reflex arcs important in biology?

• They allow for voluntary movements

• They enable fast, involuntary responses to stimuli

• They help in the digestion of food

• They are involved in the production of hormones

Which component of the reflex arc detects the stimulus?

• Motor neuron

• receptor

• Relay neuron

• Effector

Which of the following is the correct sequence of events in a reflex arc?

• Stimulus → Motor neuron → Sensory neuron → Effector

• Stimulus → Sensory neuron → Relay neuron → Motor neuron → Effector

• Effector → Motor neuron → Sensory neuron → Stimulus

• Relay neuron → Sensory neuron → Motor neuron → Effector

Describe the eye reflex response to an increase in light:

When the increase in light is detected by the light ​ (a)   , an ​ (b)   is generated and travels along ​ (c)   neurones to the spinal cord.

The the impulse travel across the synapse to reach the ​ (d)   neurone and then to a motor neurone. The impulse travels down the motor neurone to the muscles in the eye which ​ (e)   to make the pupil smaller.

• receptors
• electrical impulse
• sensory
• relay
• contract
• signal
• motor
• effector
• message

Tags

NGSS.MS-LS1-3

Name an effector in this diagram.

• A

• B

• D

• E

• F

What type of neuron is C?

• Sensory

• Inter

• Motor

What type of neuron is B?

• Sensory neuron

• Relay neuron

• Motor neuron