Science Test 2015

Question 1

The Nervous System Is Made Up Of ?

Answer 1

• The Brain

- The Spinal Cord Nerves That Run To All Parts Of Your Body

Question 2

The Brain Is Made Up Of ?

Answer 2

The Cerebrum, Cerebellum & The Brain Stem.

Question 3

The Cerebrum Controls ?

Answer 3

• Memory, Speech & Conscious Thought

- Actions such as walking, running and jumping. These are known as voluntary actions.

Question 4

The Cerebellum Controls ?

Answer 4

• Involuntary actions such as helping your balance and muscle coordination (e.g. Catching a ball)

Question 5

The Brain Stem

Controls ?

Answer 5

• Other involuntary actions such as your heartbeat, pulse, digestion & breathing

Question 6

The Nervous System Is Made Up Of ?

Answer 6

Highly specialised cells nerves or neurons.

Question 7

Neurons Transmit ?

Answer 7

Electrical signals called impulses along to the next neuron.

Question 8

What are the two different types of neurons ?

Answer 8

Sensory and motor neurons

Question 9

What are motor neurons ?

Answer 9

Motor

Question 10

All the systems in your body are controlled by 2 important systems :

Answer 10

The Nervous System & The Endocrine System.

Question 11

What are motor neurons ?

Answer 11

Motor neurons transmit messages from the brain and spinal cord to the muscles and glands.

Question 12

What is a reflex action ?

Answer 12

Sometimes a nerve impulse takes a short cut to the spinal cord and back. This is called a reflex action

Question 13

What is the order of a reflex action ?

Answer 13

• Flash of Light
• Receptors In Eye
• Sensory Neuron
• Spinal Cord
• Motor Neuron
• Pupil
• Pupil Decreases

Question 14

What are sensory neurons ?

Answer 14

Sensory neurons transmit messages from sense receptors to the brain or spinal cord.

Question 15

Motor Neurons…..

Answer 15

Carry messages from brain to muscles or glands

Question 16

The endocrine system

Answer 16

The endocrine system is made up of endocrine glands throughout the body that produce chemical messages called hormones.

Question 17

Hormones are ?

Answer 17

Made by endocrine glands and pass directly into the bloodstream

Question 18

What is the pituitary gland ?

Answer 18

It instructs other endocrine glands to release their hormones

Question 19

Muscles generate heat …

Answer 19

Which increases the temperature of the blood

Question 20

A receptor in the brain ?

Answer 20

Sends out messages to your skin

Question 21

Sweat glands …

Answer 21

Cause extra heat to be lost

Question 22

What is the order of the process to maintain your body’s temperature ?

Answer 22

• Muscles generate heat
• A receptor in the brain sends a message to your skin
• Sweat glands cause this extra heat to be lost
• Temperature falls again
• Receptors in the brain send out a message to reduce heat loss
• Body temperature gradually rises

Question 23

What is the negative feedback system ?

Answer 23

The system of control is called q negative feedback system, as the response reduces the effect of the original stimulus

Question 24

What is homeostasis ?

Answer 24

The maintenance of a constant internal environment despite changes in the external environment.

Question 25

How much of your body is water ?

Answer 25

70 percent

Question 26

You constantly lose water by ?

Answer 26

Evaporation , breathing, & in your waste products.

Question 27

The kidneys ?

Answer 27

Filter wastes from your blood and maintain the water balance in your body.

Question 28

As blood flows through the kidneys …

Answer 28

Water and dissolved wastes pass out of the blood

Question 29

A lot of water is ?

Answer 29

Reabsorbed and a concentrated solution urine flows into the bladder for storage

Question 30

What part of the body do hormones act on ?

Answer 30

Hormones can act on the whole body system, body systems and on individual glands.

Question 31

Nerves can only act on ?

Answer 31

Muscles and glands

Question 32

Mammals and birds ?

Answer 32

Maintain a constant body temperature