WorksheetsBIO270 Homeostasis & Excretory System
Total questions: 35
Worksheet time: 23mins
Which of the following is an example of positive feedback?
Thermoregulation
Blood Pressure
Childbirth
Blood Sugar Levels
Which body system controls the body to maintain homeostasis?
excretory
nervous
circulatory
skeletal
Which best describes the stimulus-response model?
Stimulus -> receptor -> effector -> control center -> response
Stimulus -> receptor -> control centre -> effector -> response
Stimulus -> effector -> control center -> receptor -> response
When blood glucose is high, the negative feedback mechanism is to produce which hormone?
Glucagon
Glycogen
Insulin
Basal Insulin
What is a Osmoconformer?
An organism that tightly regulate their internal osmolarity independently of the enviroment
An organism that have the same osmolarity as their environment
What is the role of Neurotransmitters?
Chemical signals that pass nerve signals on to the next neuron
Electrical signals that pass nerve signals on to the next neuron
Hormone signals that pass nerve signals on to the next neuron
Receptors that pass nerve signals on to the next neuron
What classification of receptors detect changes in water potential in the blood
Thermoreceptors
Proprioceptors
Photoreceptors
Osmoreceptors
Letter B represents which part of the nephron?
Afferent arteriole
Bowmans capsule
Efferent arteriole
Renal venoule
Letter F represents which part of the nephron?
Bowmans capsule
Ascending loop of Henle
Distal convoluted tubule
Descending loop of Henle
What is A correct order of the steps of function within the nephron?
Secretion, Reabsorption, Filtration
Reabsorption, Secretion, Filtration
Filtration, Reabsorption, Secretion
Secretion, Filtration, Reabsorption
Determines the level or set point at which a variable is to be maintained. Analyzes the information received by the receptor.
Control Center
Receptor
Effector
Receiver
A mix of freshwater and saltwater is called:
wetland
mangal
brackish
osmoconformer
I. Urea is the primary nitrogenous waste for aquatic invertebrates, teleost, and larval animals.
II. Osmoregulators keep the osmolarity of body fluids different from that of the environment.
A. If the two statements are both correct
B. If the first statement is correct while the second one is not
C. If the second statement is correct while the first one is not
D. If the two statements are both incorrect
I. Metabolism is the elimination of metabolic wastes including nitrogenous wastes produced from the breakdown of proteins.
II. Diffusion is the movement of water from a region of higher osmolarity to a region of lower osmolarity across a selectively permeable membrane.
A. If the two statements are both correct
B. If the first statement is correct while the second one is not
C. If the second statement is correct while the first one is not
D. If the two statements are both incorrect
I. Examples of metabolic wastes are sucrose, ammonia, carbon dioxide, and excess water.
II. Glomeruli are a fine network of capillaries that are found in each Bowman’s capsule.
A. If the two statements are both correct
B. If the first statement is correct while the second one is not
C. If the second statement is correct while the first one is not
D. If the two statements are both incorrect
Which process is primarily involved in the control and maintenance of water and ion balance in the body?
A. Respiration
B. Osmoregulation
C. Excretion
D. Nutrition
Which of the following choices correctly traces the route of glomerular filtrate on its path to the collecting duct of a nephron?
A. proximal tubule → Bowman’s capsule → descending loop of Henle → ascending loop of Henle → distal tubule
B. Bowman’s capsule → proximal tubule → descending loop of Henle→ ascending loop of Henle → distal tubule
C. Bowman’s capsule → distal tubule → descending loop of Henle → ascending loop of Henle → proximal tubule
D. Bowman’s capsule → proximal tubule → ascending loop of Henle → descending loop of Henle → distal tubule
In each nephron of the kidney, the glomerulus and Bowman’s capsule:
A. Reabsorb salts and nutrients.
B. Reabsorb water into the blood.
C. Filter the blood and capture the filtrate.
D. Break down harmful toxins and poisons.
What excretory organ is utilized by flatworms?
Malpighian tubules
protonephridia
metanephridia
kidneys
What excretory organ is utilized by earthworms?
Malpighian tubules
protonephridia
metanephridia
kidneys
What excretory organ is utilized by insects?
Malpighian tubules
protonephridia
metanephridia
kidneys
What excretory organ is utilized by vertebrates?
Malpighian tubules
protonephridia
metanephridia
kidneys
What excretory organ consists of dead-end tubules capped by flame bulbs?
Malpighian tubules
protonephridia
metanephridia
kidneys
temperature regulation center in the brain of a human
hypothalamus
thermoregulation
receptor
negative feedback
Which organ produces insulin?
(a)
Excess glucose in the bloodstream is converted to which other substance when stored in the liver and muscle cells?
glygogen
glucagon
glycerin
glycerol
What happens to the amount of insulin released if the blood glucose levels get low?
lots more is produced
nothing - low blood glucose has no effect on insulin levels
less / no insulin is produced
