SCIENCE WEEK 2B - Nervous System

Question 1

is a change in internal conditions, which is measured by different receptors.

Answer 1

Stimulus

Question 2

are any of the body structures that sense an incoming stimulus

Answer 2

Receptors

Question 3

it is the Hypothalamus and identifies the stimulus as received by the receptors and compares it with the value of the normal range or the condition’s set point.

Answer 3

Control Center

Question 4

the change returns the value to normal range.

Answer 4

Effectors

Question 5

functions for transmitting messages from one body part to
another

Answer 5

Nerve cells or Neurons

Question 6

to protect and assist neurons

Answer 6

Supporting cells

Question 7

2 types of nerve fibers

Answer 7

Dendrites and Axon

Question 8

• towards the cell body, highly branched, more numerous, shorter, thinner fibers

Answer 8

Dendrites (thin)

Question 9

• slightly-branched, fewer, longer, thicker fibers, away from the cell body

Answer 9

Axons (thick)

Question 10

carry impulses from the sense organs to the brain or spinal cord

Answer 10

Sensory Neurons

Question 11

carry impulses from the brain or spinal cord to the muscles

Answer 11

Motor Neurons

Question 12

process the impulses from the sensory neurons,and then relay directives to motor neurons.

Answer 12

Associative Neurons or Interneurons

Question 13

serves as a pathway of nerve impulses going to or coming from the brain

Answer 13

Spinal Cord

Question 14

voluntary actions

Answer 14

Somatic nervous system

Question 15

Involuntary action

Answer 15

Autonomic nervous system

Question 16

is a control system to reduce or minimize any changes or
conditions of the body, which keeps the whole body system stable. ex. blood pressure regulation

Answer 16

Negative feedback

Question 17

is a control system which uses information from sensors to
increase the rate of processes. ex. childbirth

Answer 17

Positive feedback

Question 18

Seat of thinking, reasoning, and power of imagination; sensory-motor coordination; origin of all cerebral functions

Answer 18

Gray matter

Question 19

Relays impulses between the cortex and the rest of the brain and spinal cord

Answer 19

White matter

Question 20

For language, logic, and mathematics

Answer 20

Left cerebral hemisphere

Question 21

For spatial perception, musical ability, artistic ability, and emotions

Answer 21

Right cerebral hemisphere

Question 22

Directs all incoming sensory information to the cortex; handles outgoing motor impulses

Answer 22

Thalamus

Question 23

Maintains homeostasis; regulates many hormones, blood pressure, body temperature, heart rate, hunger, thirst, and emotions

Answer 23

Hypothalamus

Question 24

Relays sensory information to the cerebrum; coordinates eye reflexes; also helps regulate sleep

Answer 24

Midbrain

Question 25

Relays information between the spinal cord and the brain through their sensory and motor neurons; regulates breathing, heartbeat, and digestion; also coordinates walking and other movements of the body

Answer 25

Pons and Medulla Oblongata

Question 26

Regulates balance and muscle coordination

Answer 26

Cerebellum

Question 27

Cerebrum, Thalamus, Hypothalamus

Answer 27

Forebrain

Question 28

Pons, Medulla Oblongata, Cerebellum

Answer 28

Hindbrain