Coordination and response

Question 1

stimuli,receptor,effector

Answer 1

All organisms are able to sense changes in their environment, called stimuli, and respond to them. The part of the body that senses the stimulus is a receptor, and the part that responds is an effector.

Question 2

neurons

Answer 2

The human nervous system contains specialized cells called neurons.

Question 3

CNS

Answer 3

The brain and spinal cord make up the central nervous system (CNS), which coordinates responses to stimuli.

Question 4

reflex actions

Answer 4

Reflex actions are fast, automatic responses to a stimulus. They involve a series of neurons making up a reflex arc. A sensory neurone takes the impulse to the CNS and a motor neurone takes it from the CNS to an effector.

Question 5

Receptors are generally found within

Answer 5

sense organs.

Question 6

Two types of action controlled by the human nervous system are:

Answer 6

voluntary and involuntary actions. The peripheral nerves transmit both of them.

Question 7

The human nervous system is made up of two parts:

Answer 7

Central nervous system (CNS) - brain and spinal cord: role of coordination
Peripheral nervous system - nerves: connect all parts of the body to the CNS.
Together, they coordinate and regulate body functions.
Sense organs are linked to the peripheral nervous system.

Question 8

Sensory neurone

Answer 8

sense organs à CNS

Question 9

Motor neurone

Answer 9

CNS à effectors

muscles or glands

Question 10

Motor and sensory neurones are covered with a

Answer 10

myelin sheath, which insulates the neurone to make transmission of the impulse more efficient.