quiz on control & coordination

An effector is also known as a ____________ to an action

• Stimulus

• Sensory neuron

• Motor neuron

• Response

In a reflex arc, the sensory neuron leads to the ___________ and the motor neuron leads to the __________

• Spinal cord, CNS

• CNS, muscle

• Spinal cord, muscle

• Muscle, CNS

What happens in the spinal cord during a reflex arc?

• The stimulus causes a sensory neuron to generate a nerve impulse

• The nerve impulse carries a signal to be directly sent to a sensory neuron

• The motor neuron causes a contraction

• The nerve impulse carries a signal to be directly sent to a motor neuron

Reflex actions are important because

• They provide a quick, involuntary response

• They prevent injury

• They are essential to the survival of organisms

• All of the above

Phototropism is the growth of an organism in response to a light _________.

• light

• dark

• none of the above

• all of the above

What happens when a root bends in the direction of the force of gravity?

• The top side grows more than the bottom side

• The bottom side grows more than the top side

• The top and bottom sides grow at the same rate