LIVING ENVIRONMENT: skeletal, muscular and nervous system

Question 1

Skeleton

Answer 1

bones that protect the brain and spinal cord

Question 2

Bones

Answer 2

hard whitish tissue making up the skeleton in humans

Question 3

Ligaments

Answer 3

attach to the bone

Question 4

Tendons

Answer 4

attach the muscles to the bone

Question 5

Muscles

Answer 5

allow for movement by pulling on the bone

Question 6

Stimuli (stimulus)

Answer 6

vent that evokes a specific functional reaction in an organ or tissue.

Question 7

Receptor

Answer 7

organ or cell able to respond to light, heat, or other external stimulus

Question 8

Nervous system

Answer 8

includes the brain, spinal cord, and a complex network of nerves.

Question 9

Neuron

Answer 9

are used for the transmission of impulses

Question 10

Sensory neuron

Answer 10

transmits impulses from the sensory organs to the spinal cord

Question 11

Motor neuron

Answer 11

transmits impulses from the brain and spinal cord to effectors

Question 12

Interneuron

Answer 12

found in the spinal cord and brain and transmits impulses from the sensory neurons

Question 13

Impulse

Answer 13

a sudden strong and unreflective urge

Question 14

Reflex arc

Answer 14

stimulus –> sensory neurons –> interneurons –> motor neurons–> muscle effector

Question 15

Neurotransmitters

Answer 15

chemical messengers that your body can’t function without.

Question 16

Synapse

Answer 16

a junction that allows a neuron to pass an electrical message to another neuron

Question 17

Axon

Answer 17

part of a nerve cell along which impulses are conducted from the cell body to other cells.

Question 18

Dendrite

Answer 18

are appendages that are designed to receive communications from other cells.

Question 19

Medulla

Answer 19

involuntary actvivties ;like breathing and heartbeat

Question 20

Cerebrum

Answer 20

largest part of the brain, center of control for voluntary body movement

Question 21

Cerebellum

Answer 21

coordinates motor activity aids in maintaining balance