Biology chapter 5 Flashcards
Where does the body react to?
1.Changes around you
2.Internal changes → when you are hungry
Why is it important that the body notices changes?
For survival
What is a stimuli?
any external or internal change that causes a reaction
Name examples of a stimuli
- Hearing sounds
- Smelling food
- Seeing something
- Feeling warmth
- Tasting food
What is a response?
reaction to a stimuli
With help of what does your body react to a stimuli?
The nervous system
What are sensory receptors?
Specialised cells in your body
What do sensory receptors?
Convert stimuli to a nerve impulse
What is a nerve impulse?
electrical signal
What is a nerve cell/neuron?
cells that control impulses to their destination
What is effector?
Muscles make the response possible
What are 2 kind of effectors?
1.Voluntary response = by skeletal muscle
2.Involuntary response = by muscle → geen controle over
Stappenplan stimuli to response
Stimulus → sensory receptor (brain) → neuron (whole body) → effectors (advice) → response
What is voluntary response?
A reaction, that is your decision, made by your skeletal muscle
What is involuntary response?
A reaction made by your smooth muscle→ cannot control or decide yourself→stomach growling
Stappenplan stimulus
Hear phone→ sensory receptors receive sound→ change into nerve impulses→ Travel along neurons to your brain→ become aware of the sound of your phone→ Brain sends its own nerve impulses along other
What kind of muscle response are there?
Involuntary/ smooth muscle= involuntary response
Voluntary/ skeletal muscle= voluntary response
What are detectors?
- They alert you if you are in danger
- Pleasant things
Name pleasant examples of detectors
- The touch of puppy’s fur
- The smell of chips
- The sound of your friend calling your name
Name examples of sense organs
- Eyes
- Ears
- Tongue
- Skin
- Nose
What are the sense organs sensitive to?
To stimuli
What are the 5 abilities(senses) of your sense organs?
1.Vision
2. Hearing
3. Smelling
4. Tasting
5. Feeling
Name the 5 senses of the skin
- Sensory receptor cells for heat
- Sensory receptor cells for cold
- Sensory receptor cells for pain
- Sensory receptor cells for pressure
- Sensory receptor cells for (light) touch
What are the sensitive receptors inside your eyes sensitive to?
To light
What is the function of the eye muscle?
Turn the eye in the desired direction
What is the function of the Cilliary muscle
To control the shape of the lens