SCIENCE W2 3Q

Question 1

is made up of a group of organs called endocrine glands.

Answer 1

Endocrine system

Question 2

• came from the Greek word “Endo”
• meaning “within”, and “Crinis” meaning “secrete”

Answer 2

Endocrine

Question 3

Endocrine glands is also called as

Answer 3

Ductless gland

Question 4

• are the secretions of the endocrine glands.
• are special protein substances.
• bring about changes in cells or tissues.
• effects may be an increase or decrease activity of target cells.
• effects may just also be to maintain cells

Answer 4

Hormones

Question 5

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

Answer 5

Stimulus

Question 6

are any of the body structures that sense an incoming stimulus.

Answer 6

Receptors

Question 7

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 7

Control center

Question 8

the change returns the value to normal
range.

Answer 8

Effector

Question 9

functional unit of the nervous
system, functions for transmitting
messages from one body part to
another.

Answer 9

Nerve cells or neurons

Question 10

Protect and assist the nerve cells

Answer 10

Supporting cells

Question 11

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

Answer 11

Dendrites

Question 12

• What slightly-branched, fewer, longer, thicker fibers.
• carries messages away from the cell body

Answer 12

Axon

Question 13

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

Answer 13

Sensory neurons

Question 14

carry impulses from the brain or spinal cord to the muscles.

Answer 14

Motor neurons

Question 15

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

Answer 15

Associate neurons or interneurons

Question 16

• A gelatin-like tissues

Answer 16

The brain

Question 17

contains the cell bodies and dendrites of the brain
neurons

Answer 17

Gray matter

Question 18

is dominated by myelinated axons (myeline sheath)

Answer 18

White matter

Question 19

• A tube of nerves inside our backbone or
  spine, the spinal cord serves as a pathway
  of nerve impulses going to or coming from
  the brain.
• It provides a centralized mass of neurons for
  precessing nerve impulses
• Is composed of myelinated axon white
  matter and gray matter made up of
  dendrites and cell bodies. The white matter
  surrounds the gray matter

Answer 19

The spinal cord

Question 20

• is made up of 12 pairs of cranial nerves,
31 pairs of spinal nerves.
• these nerves connect the brain and
spinal cord to the sensory organs and
voluntary muscles or the skeletal
muscles.

Answer 20

Somatic nervous system

Question 21

• connects brain and spinal cord muscles that are NOT under the control of our will. Ex., muscles of the heart, blood vessels, lungs, food tube, liver,
pancrease, salivary glands, tear glands,
urinary bladder, and other internal
organs

Answer 21

Autonomic nervous system

Question 22

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 22

Negative feedback

Question 23

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

Answer 23

Positive feedback