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WorksheetsWeek 1
Total questions: 17
Worksheet time: 6mins
The building blocks for an organism go in which order?
Atoms-molecules-macromolecules-cells-organelles-organs-tissues
Atoms-macromolecules-molecules-cells-organelles-organs-tissues
Organism-organs-cells-molecules-organelles-macromolecules
Atoms-molecules-molecules-organelles-cells-tissues-organs
How many organ systems are there?
13
11
9
48
What is in the extracellular fluid?
Cytosol
Just interstitial fluid
Intracellular fluid
Blood and interstitial fluid
What is the purpose of homeostasis?
To maintain the body's internal environment between an optimum range
To let a your homie stay at your place
To allow the body to sleep
To maintain the body's internal environment at a specific set target, not within a range
What factors does homeostasis moderate?
Nutrient levels
Blood pH
Waste products and electrolytes
All of the above
What does a negative feedback loop do?
Increase muscle strength
Return a stimulus to between an optimum range
Keep a stimulus outside an optimum range
Push a stimulus outside an optimum range
What does a positive feedback loop do?
Keep a stimulus within a narrow optimal range
Allow the body to detect a stimulus
Keep a stimulus outside its optimal range to perform a specific function
Activate the touch receptors
Which direction is an efferent nerve signal going?
Away from the central nervous system
Towards the central nervous system
The question is incorrect signals only travel in one direction within the body
Just within the central nervous system
Which way is an afferent nerve signal going?
Away from the central nervous system
Outside of the central nervous system
Towards the central nervous system
Inside of the peripheral nervous system
What has a faster signalling time?
Hormones
Nerve reflexes
Nerve impulses
The endocrine system
What is the haematocrit?
White blood cells
Plasma
Electrolytes
Red blood cells
Which gender has a higher haematocrit percentage?
Female
Neither gender have the same percentage
Male
Both genders have the same percentage
What is the most important structural characteristic of red blood cells?
Ability to bend and flex
High surface area to volume ratio
Concave shape
Stackability
What are the functions of blood?
Regulation of temperature, ph, and fluid volume
Distribution of O2, wastes, nutrients and hormones
Protection by infection control and preventing blood loss
Propulsion of nerve signals
How is hemoglobin helpful to the body in regards to O2?
Readily releases O2 in lungs when levels are low
Readily binds O2 in lungs when O2 levels high
Readily binds O2 in tissues when O2 levels are low
Readily releases O2 in tissues when O2 levels low
What is the usefulness of hemoglobin in regards to CO2?
Readily binds CO2 in tissues when CO2 levels high
Readily releases CO2 in lungs when CO2 levels low
Readily binds CO2 in lungs when CO2 levels are low
Readily releases CO2 in tissues when levels are low
Some examples of white blood cells are?
Neutrophils and esinophils
Monocytes and lymphocytes
Platelets
Lysosomes
