Answer:
false
Explanation:
The parathyroid gland refers to the four small endocrine glands located in the neck region behind the thyroid. It secretes the parathyroid hormone or parathormone which regulates the calcium levels in our bodies. It comprises two types of cells which are:
a. The oxyphil cells appear at the onset of puberty and they have no known functions. They appear pink or orange when stained with hematoxylin and eosin stain.
b. The chief cells are more abundant compared to the oxyphil cells and stain dark purple by the action of hematoxylin and eosin stain. Their major function is to produce parathyroid hormone which regulates the amount of calcium in the body.
Answer:
True
Explanation:
When the resting potential of the membrane is changed, the membrane becomes either more negative inside or less negative. This small deviation from the resting potential is called graded potential. A graded potential occurs when a stimulus triggers opening or closing of the mechanically gated or ligand-gated channels present in the plasma membrane.
For example, the presynaptic neuron releases neurotransmitters in response to a nerve impulse. The neurotransmitter binds to receptors present in the plasma membrane of the postsynaptic neuron and triggers the opening of the ion channels to allow the inflow of particular ions to flow. The flow of ions changes the voltage across the membrane. This change in membrane voltage is a postsynaptic potential and is a type of graded potential.
The temperature insensitive, thermostable, DNA polymerase was extracted from a bacterium found in hot springs can withstand the high temperatures needed to separate the double stranded DNA and the replication process can continue uninterrupted. The enzyme thermus aquaticus can withstand the high temperature used to separate double stranded DNA, so replication does not need to be interrupted by the need to add more enzymes.
The limited policies is the kind of health insurance policies that covers low frequency diseases.This policy only pay on event of certain occurrences as specified in the contract. It provide insurance for very narrow and specified risks.Example of dread disease policy can be purchased to cover specific disease as it is named in the policy.
Less of the sugars produced in the leaves is used making cellulose, the structural molecule that supports stems in herbaceous plants. As a result, more is free to be stored in grain in the form of starch. Hope this helps! :D<span>
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