20:Unless an organism takes a step to counter the effect, what will happen to fluid balance...

20:Unless an organism takes a step to counter the effect, what will happen to fluid balance as the temperature rises?
A:fluid concentration will not be affected.
B:Fluid concentration will decrease.
C:It is impossible to determine.
D:Fluid concentration will increase.
21:If the value of a particular variable is crucial to the functioning of epithelial tissue, which method of homeostatic control is most likely?
A:This type of variable would be under continuous control, not homeostatic control.
B:It is impossible to determine.
C:Positive feedback.
D:negative feedback.
22:The root system is the below ground portion of the plant where it only provides structural support.
A:true
B:false

23:One mechanism by which some pollutants affect fish is that they cause acetylcholine receptors on muscle cells to be unable to open. Acetylcholine is a neurotransmitter used to signal that muscles should contract. Although these types of poisons do not directly affect the nervous system of the fish, which type of neuron will be unable to perform its function when acetylcholine receptors cannot open?
A:Interneurons.
B:Sensory neurons.
C:Motor neurons.
D:More than one of these.

Expert Solution

20.In case of elevated temperature the body’s increased heat will result in loss of water through sweating and through evaporation as water vapour through the lungs in exhaled air .This results in a decline in the water content specially from the extra cellular component resulting in a decrease in fluid concentration.

Therefore option b is the right answer.

21.In case of a variable in the epithelial tissue there is cell plasticity and these cells are flexible where there is a continuous control between the metabolic activities leading to either death or division.

Therefore option A is the right answer.

22.The statement is false because the roots are involved in storage and absorption of water and mineral apart from providing structural support.

Therefore the answer is option b

23.Acetylcholine is mainly involved as a neurotransmitter in the parasympathetic nerves system which includes motor neurons .Usually in sensory neurons neurotransmitters like glutamate are involved .Whereas Ach is also present in the inter neurons in brain

Therefore the correct answer is option d

gladiator answered 2 years ago

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