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rosijanka [135]
3 years ago
6

The pupil opens and closes automatically in response to light.What part of your nervous system controls this response and is it

voluntary or involuntary
Biology
1 answer:
Zigmanuir [339]3 years ago
4 0
Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve. Involuntary reflex reaction to exposure or inexposure to light—in low light conditions a dilated pupil lets more light into the eye. :)
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All of the following are typical physiological effects of dehydration except _______. Multiple Choice increased blood osmolality
Tatiana [17]

According to the research, all of the following are typical physiological effects of dehydration except <u>osmolality decreased</u>.

<h3>What is dehydration?</h3>

It is the process that refers to eliminating or losing the water that is part of the composition or that contains an organism.

Among the most frequent effects are thirst, osmolality increases, increased sweat rate, dry skin and fatigue.

Therefore, we can conclude that according to the research, all of the following are typical physiological effects of dehydration except osmolality decreased.

Learn more about dehydration here: brainly.com/question/12261974

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3 0
1 year ago
An estuary is ___
emmainna [20.7K]

Answer:

<em>The correct option is d)  an ecotone</em>

Explanation:

An ecotone can be described as an area of transition between two different biomes. An estuary can be described as an ecotone where the river water meets the seawater. The freshwater biome mixes with the seawater biome in an estuary. Unique plants and animals are grown in an estuary which are adapted to live in such an environment. The water present in an estuary is termed as brackish water. Hence, the correct option is d.

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3 years ago
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The minimum amount of energy needed to start a chemical reaction is known as:
nadya68 [22]

Answer:

The correct option is B. Activation energy

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For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy. As the molecules approach, their electron clouds are rejected. This requires energy (activation energy) and comes from the heat of the system, that, is, from translational, vibrational energy, etc of each molecule. If the energy is sufficient, the repulsion is overcome and the molecules are close enough for a rearrangement of the bonds of the molecules.

The concept of Activation energy was introduced by Arrhenius in 1889. Arrhenius suggested that molecules must prossess a minimum amount of energy to react. That energy comes from the kinetic energy of the clliding molecules. Kinetic energy serves to cause reactions, but if the molecules move very slowly, the molecules will only bounce when they collide with other molecules and the reaction does not happen. In order for the molecules to react, they must have a total kinetic energy that is equal to or greater than a certain minimum value of energy called activation energy.

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