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Bio 1002 Final Exam- Pomarico LSU Questions and Answers
with Complete Solutions UPDATED!!!
Homeostasis - ANSWER Tendency of life to try and maintain the
structure and regulate the internal environment
digestive - ANSWER One of the biggest and most frequent
homeostatic challenges an animal faces comes from the
__________________ process.
unselective - ANSWER The digestive system is
________________ in what crosses the intestinal wall and
enters the cells.
Excretory System - ANSWER Restores and maintains the proper
internal regulation of these materials in the body despite
differences in diet
Flame cells in flatworms - ANSWER Most simple excretory
system?
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Flame cells - ANSWER Hollow bulbs at the end of the network
of tubes branching throughout the flatworm's body
-Water and dissolved wastes are filtered into the bulbs
Nephridia - ANSWER -In nearly every section of earthworms
and in mollusks.
-Function as simple kidneys.
-Wastes and nutrients collected from the blood and tissues fills
the coelom
Nephrostomes - ANSWER Funnel-shaped openings where
coelomic fluid enters the nephridia.
1. Excretion of cellular waste products
2. Regulation and maintenance of body fluid composition (ions,
water, nutrients)
3. Secretion of hormones - ANSWER 3 Major Functions of the
Excretory System (mammals)
Kidneys - ANSWER -Filters blood and produces urine
-Complex organs that resemble a dense collection of nephridia
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-Paired, bean-shaped organs
-About 5x3x1 inch
-Have a large surface area where nutrients are selectively
reabsorbed and wastes and some water are left behind to form
urine
-Regulates water absorption
Urea - ANSWER A compound that removes ammonia from the
blood
Formation and excretion of urea - ANSWER 1. Proteins in food
are digested
2. Amino acids are carried in the blood to body cells
3. Amino acids become ammonia (toxic) and simpler molecules
4. Ammonia becomes urea, which is less toxic.
5. Urea is carried in the blood to the kidneys
6. In kidney nephrons, urea is filtered into the urine.
kidneys; urinary system - ANSWER Excretion in humans and
other vertebrates is accomplished by the ____________ and
the ______________ _______________.
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arteries; veins - ANSWER Unfiltered blood enters through the
renal _____________ and filtered blood leaves through renal
____________.
Ureter - ANSWER Passes urine by peristalsis to the bladder
Bladder - ANSWER Hollow muscle that stores and collects urine
Urethra - ANSWER Where urine is emptied
sphincter - ANSWER The retention of urine in the bladder is
controlled by 2 _______________ muscles.
involuntarily; receptors in the bladder walls trigger reflexive
contractions - ANSWER The first sphincter opens
____________________. Due to...
voluntarily - ANSWER The second sphincter opens
_____________________.
Bio 1002 Final Exam- Pomarico LSU Questions and Answers
with Complete Solutions UPDATED!!!
Homeostasis - ANSWER Tendency of life to try and maintain the
structure and regulate the internal environment
digestive - ANSWER One of the biggest and most frequent
homeostatic challenges an animal faces comes from the
__________________ process.
unselective - ANSWER The digestive system is
________________ in what crosses the intestinal wall and
enters the cells.
Excretory System - ANSWER Restores and maintains the proper
internal regulation of these materials in the body despite
differences in diet
Flame cells in flatworms - ANSWER Most simple excretory
system?
, Page |2
Flame cells - ANSWER Hollow bulbs at the end of the network
of tubes branching throughout the flatworm's body
-Water and dissolved wastes are filtered into the bulbs
Nephridia - ANSWER -In nearly every section of earthworms
and in mollusks.
-Function as simple kidneys.
-Wastes and nutrients collected from the blood and tissues fills
the coelom
Nephrostomes - ANSWER Funnel-shaped openings where
coelomic fluid enters the nephridia.
1. Excretion of cellular waste products
2. Regulation and maintenance of body fluid composition (ions,
water, nutrients)
3. Secretion of hormones - ANSWER 3 Major Functions of the
Excretory System (mammals)
Kidneys - ANSWER -Filters blood and produces urine
-Complex organs that resemble a dense collection of nephridia
, Page |3
-Paired, bean-shaped organs
-About 5x3x1 inch
-Have a large surface area where nutrients are selectively
reabsorbed and wastes and some water are left behind to form
urine
-Regulates water absorption
Urea - ANSWER A compound that removes ammonia from the
blood
Formation and excretion of urea - ANSWER 1. Proteins in food
are digested
2. Amino acids are carried in the blood to body cells
3. Amino acids become ammonia (toxic) and simpler molecules
4. Ammonia becomes urea, which is less toxic.
5. Urea is carried in the blood to the kidneys
6. In kidney nephrons, urea is filtered into the urine.
kidneys; urinary system - ANSWER Excretion in humans and
other vertebrates is accomplished by the ____________ and
the ______________ _______________.
, Page |4
arteries; veins - ANSWER Unfiltered blood enters through the
renal _____________ and filtered blood leaves through renal
____________.
Ureter - ANSWER Passes urine by peristalsis to the bladder
Bladder - ANSWER Hollow muscle that stores and collects urine
Urethra - ANSWER Where urine is emptied
sphincter - ANSWER The retention of urine in the bladder is
controlled by 2 _______________ muscles.
involuntarily; receptors in the bladder walls trigger reflexive
contractions - ANSWER The first sphincter opens
____________________. Due to...
voluntarily - ANSWER The second sphincter opens
_____________________.
