Characteristics of Life
Organelles
Body Systems
Homeostasis
Surprise!
100
Name 3 characteristics of life
-Made of cells
-Grows and develops
-Maintains homeostasis
-Reproduces
-Responds to a stimulus
-Displays organization
-Requires energy
100
This organelle packages up proteins and sends them around the cell
Golgi Apparatus
100
Neuron cells for what type of tissue?
Brain tissue
100
Is this a graph showing negative or positive feedback?
Negative
100
What is a positive feedback loop?
The brain receives a signal and instead of transmitting a signal to stop that process it transmits a signal to keep amplifying that process until it ends
200
Which characteristic of life explains why babies and adults do not look the same?
Growth and development
200
Name 3 organelles not found in animal cells
Cell wall, central vacuole, chloroplasts
200
Name two of the four types of tissue in the human body
Muscle
Nerve
Connective
Epithelial
200
Describe the difference between a positive feedback loop and a negative feedback loop
A positive feedback loop means the signal keeps amplifying and won't end until the event is over.
A negative feedback loop means a signal is sent out to stop the event and bring the body back to normal.
200
Is this a prokaryotic cell or a eukaryotic cell?
Prokaryotic
300
Give an example of a stimulus and response
-Sweating in response to hot weather
-A touch-me-not plant recoiling from someone poking it
-Heart rate increasing as a result of exercise
300
What organelle is this an analogy for?
Ribosomes - make proteins
300
This system is the largest in the body, acting as a physical barrier to the outside world, prevents water loss, and helps regulate internal temperatures
Integumentary (skin)
300
Why is it important for our bodies to maintain homeostasis?
If homeostasis is not maintained, it can affect every process in our bodies. Some body functions need to happen within certain temperature ranges, and homeostasis helps us maintain a stable temperature (among other things).
300
Why are plants green?
They contain chlorophyll (which is green)
400
What are two of the characteristics of life a car shows?
Responds to a stimulus
Displays organization
400
How does the structure of a lysosome relate to its function?
Membrane-bound organelles that contain digestive juices to break down worn out organelles
Without its membrane, the digestive juices would leak everywhere and destroy everything around it
400
How does the circulatory system interact with the endocrine system?
Blood (circulatory system) carries hormones (endocrine system) around the body so hormones can do their jobs
400
How do our kidneys (and the excretory system) help us maintain homeostasis?
The kidneys filter the blood, removing waste products, and the excretory system allows the waste to leave our bodies
Without functioning kidneys, your body is unable to remove waste and the waste can build up in your body
400
What is glucagon and how is related to maintaining blood sugar?
Glucagon is released from the pancreas when blood sugar levels are too LOW. Glucagon makes the liver release some stored glucose, which raises blood sugar levels.
500
Some of the characteristics of life apply to water but water is not a living thing - why?
Not made of cells
Can't reproduce
Not organized
Doesn't maintain homeostasis
500
Why is the inner membrane of mitochondria folded?
It increases the surface area for ATP production
500
"Mom strength" or hysterical strength is a display of extreme strength by humans, beyond what is believed to be normal, usually occurring when people are in life-and-death situations (i.e. lifting a car off of a child). What body systems are interacting during these displays of immense strength?
Muscular system - muscles involved
Endocrine system - adrenaline released
Circulatory system - blood moves adrenaline around body
Nervous system - signal sent from brain to muscles to lift car
500
When fruits are ripening, they release a gas called ethylene. The gas causes the nearby fruits exposed to the ethylene to begin to ripen. As the ripening continues, these fruits also continue to release ethylene gas.
Is this an example of positive or negative feedback? How do you know?
Positive - as the fruit ripens more ethylene is released, which causes nearby fruits to ripen and release even more ethylene
500
Why do we have 3 different types of muscle instead of just 1?
Skeletal muscle - moves bones
Cardiac muscle - allows the heart to contract and pump blood
Smooth muscle - changes shape to help with bodily functions (like digestion)
All do completely different functions