y9 term 1 - body systems and the brain

Question 1

respiration word equation?

Answer 1

oxygen + glucose —> water + carbon dioxide + energy

Question 2

stimulus-response pathway (nervous system)?

Answer 2

stimulus —> sensory nerve —> cns —> motor nerve —> response

Question 3

stimulus-response pathway (endocrine system)?

Answer 3

stimulus —> gland —> hormone —> circulatory system —> retarget organ —> response

Question 4

central nervous system?

Answer 4

contains brain and spinal cord
transmits messages to and from the brain and controls spinal reflexes

Question 5

peripheral nervous system?

Answer 5

two divisions; sensory and motor
contains nerves and receptors

sensory - carries messages to and from brain for processing
motor - carries impulses from the cns to appropriate organs

Question 6

synapse?

Answer 6

place where impulses are transmitted from one neuron to another.
synaptic knob, synaptic cleft and plasma membrane

Question 7

phagocytosis process?

Answer 7

1. pathogen attaches to phagocyte
2. pathogen is engulfed by infolding of phagocyte membrane
3. lysosomes release lysine into phagocyte cell
4. harmless end products of this digestion are absorbed

Question 8

inflammation after an accident?

Answer 8

1. dilation of blood vessels, increase blood flow
2. chemical released = attract more phagocytes
3. increase flow of fluid from the blood vessels