Answer:
Argon's atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.
Explanation:
Atoms are the most basic unit of matter that makes up elements. Atoms are composed of electrons orbiting neutrons and protons surrounding a nucleus.
The atomic number is defined as the number of protons in an atom, while the atomic mass is the number of protons and neutrons.
The element Argon, Ar is a noble gas, that exists in a gaseous, inert, state at temperature. Its atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.
There are 8 valence electrons in its outer shell, thus:
- Ar is not very reactive, as it does not require electron sharing in atomic bonding.
- It shows low conductivity, as there are no free electrons
Attached is the picture regarding the question.
From left to right.
The first picture is a <u>basophil</u>. It is a granulocyte. It has deep blue cytoplasmic granules. Basophils function to release histamine and heparin. Basophils are elevated usually in conditions involving allergic reactions. It is also the least abundant WBC. Basophils are similar in characteristic with mast cells except mast cells are embedded in tissues and basophils are circulating in bloodstream.
The second picture is an <u>eosinophil</u>. Eosinophils are also granulocytes. It has deep red cytoplasmic granules. Eosinophils function to combat allergic reactions but mostly elevated in cases of parasitic worm infections. The deep red granules contain enzymes that are very effective in combating parasitic worm infections.
The third picture is a <u>lymphocyte</u>. It is an agranulocyte as it has no cytoplasmic granules. The characteristic morphology of lymphocytes is a spherical nucleus with small rim of cytoplasm. Lymphocytes can be classified as T and B cells, depending on the function. T cells can be cytotoxic or helper. B cells can differentiate into plasma cells to produce antibodies. Lymphocytes are considered as a clinical sign of chronic inflammation and/or viral infections.
The fourth picture is a <u>monocyte</u>. Monocytes are also agranulocytes. These monocytes respond to tissue inflammation through chemotaxis and become macrophages in tissues. Monocytes are the largest WBC. The main function of macrophages is for phagocytosis of foreign bodies, bacteria, and dead tissues.
The fifth picture is a <u>neutrophil</u>. It is a granulocyte. Neutrophils have fine light purple cytoplasmic granules called azurophilic granules. Neutrophils are classified as the the most abundant WBC. Neutrophils are also called as polymorphonuclear cells because of the multilobed appearance of the nucleus. Neutrophils are considered as a clinical sign of acute inflammation and/or bacterial infections.
<span>The correct answer is A.
Photosynthesis.
Photosynthesis is referred to as the process where plants use energy from the sun, carbon dioxide, and water to make food. Photosynthesis is largely responsible for maintaining and producing oxygen content of the atmosphere of the earth and then supplies all organic compounds and energy which is necessary for life.
The first photosynthetic organisms which probably evolved in the history of evolution is used as reducing agents, for example, hydrogen sulfide and hydrogen.</span>
Answer:
Explain why one person has green eyes while another person has brown eyes.
Use these words: function of DNA
protein
gene
sequence
nitrogenous bases
Explanation:
Explain why one person has green eyes while another person has brown eyes.
Use these words: function of DNA
protein
gene
sequence
nitrogenous bases
Answer:
Generation of an action potential in the neuron.
Stimulation of Ca2+ entry into the neuron
Release of acetylcholine into the synapse
Depolarization of the muscle fiber membrane
Explanation:
The following events takes place in the vertebrate neuromuscular junction
a) Nerve Action Potential - Action potential reaches the axon terminal
b) Entry of calcium ion - The calcium ion reaches the axon terminal and enter into the presynaptic terminus after which the Synaptic vesicles fuse with the membrane of axon terminal
c) Releasing of Arch Quanta - Acetylcholine is released into synaptic cleft which then binds to the receptor sites on motor end plate
d) The Na+/K+ channels opens and Motor end plate becomes depolarized.