Biology 3201 (1.1)
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What does a large cell volume to surface area ratio mean?
Materials like nutrients and wastes have difficulty diffusing in and out of cells
T/F: it will be easy for a large cell to meet its nutrient requirements
What do large cells do to reach their nutrient requirements? What does this do?
- Divide when they reach a certain size;
- this increases the surface area to volume ratio and therefore the ease with which nutrients and wastes may enter and leave the cell.
What is gray matter used for? White matter?
Gray matter: processing; white matter: communicating
The large upper region of the brain
Involved in the control of muscles and the integration of information from other parts of brain + allows critical thinking to occur
Recieves sensory information from skin and skeletal muscles and is associated with the sense of taste
Receives information from eyes/associated with visual processing
Receives information from ears and is associated with auditory processing/involved in memory and speech
Helps maintain balance and posture of the body; motor area of the brain
Extends downward from the brain and connects to the spinal cord; controls basic life functions like heartbeat and breathing
Sensory relay station; receives impulses from most sensory neurons entering the brain and directs them to parts of the cortex to be interpreted
Controls hunger, thirst, temperature maintenance, water balance, blood pressure, and release of many hormones
A short segment of the brainstem between the cerebrum and the pons- particularily involved in sight and hearing- contains auditory and visual reflex arcs
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