Salivary glands create saliva and secrete saliva. Acini, which are collections of cells, are the primary secretory components of salivary glands.
The largest salivary glands, the parotid glands, which are located between the rear of the jaw and each ear, release around 25% of the total volume of saliva when at rest.
The parotid capsule, a tough capsule that encases each gland, is present. Saliva from the parotid is typically watery or serous.
Large amounts of bicarbonate ions are secreted, potassium is secreted, and a significant portion of sodium is actively reabsorbed.
Salivary glands include small collecting ducts that branch out into larger ducts until they unite into one giant duct that exits into the mouth cavity.
Therefore, salivary gland cells produce the enzyme salivary amylase and secrete it into the salivary ducts.
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Answer:
Saliva is produced in and secreted from salivary glands. The basic secretory units of salivary glands are clusters of cells called an acini. These cells secrete a fluid that contains water, electrolytes, mucus and enzymes, all of which flow out of the acinus into collecting ducts. Within the ducts, the composition of the secretion is altered. Much of the sodium is actively reabsorbed, potassium is secreted, and large quantities of bicarbonate ion are secreted. Bicarbonate secretion is of tremendous importance to ruminants because it, along with phosphate, provides a critical buffer that neutralizes the massive quantities of acid produced in the forestomach's. Small collecting ducts within salivary glands lead into larger ducts, eventually forming a single large duct that empties into the oral cavity.
Explanation:
The given blank can be filled with performs all the function.
In case of unicellular organisms, which have a single cell, this single cell perform all the function. For a living organism, responding to stimuli, reproduction, obtaining nutrition, excretion and performing all the metabolic process is necessary. If the organism is made up of single cell, that single cell will perform all these functions necessary for life, other wise, it would be dead.
extinction would lead to the extinction of other forms of life. A keystone species helps to
support the ecosystem of which it is a part.
An example of what can happen when a keystone species is removed occurred when fur
hunters eliminated sea otters from some Pacific Ocean kelp beds. Otters eat sea urchins,
which eat kelp. With its major predator gone, sea urchin populations exploded and
consumed most of the kelp. Fish, snails, and other animals associated with the kelp beds
disappeared.
The grizzly bear is another example of a keystone species. Grizzlies transfer nutrients
from the ocean ecosystem to the forest ecosystem. The first stage of this transfer is
performed by salmon that swim up rivers, sometimes for hundreds of miles. Salmon are rich
in nitrogen, sulfur, carbon, and phosphorus. The bears capture the salmon and carry them
onto dry land, scattering nutrient-rich feces (wastes) and partially eaten salmon carcasses.
It has been estimated that the bears leave up to half of the salmon they harvest on the
forest floor.
One action humans can take that might ensure that these sea otters will continue their function as
a keystone species in their environment is to
(1) establish a sea otter wildlife refuge in the Atlantic Ocean
(2) pass laws to regulate the hunting of sea otters
(3) plant kelp in the Pacific Ocean
(4) destroy sea urchins found living in the kelp beds
To ensure sea otters, a keystone species, continue their ecological function, humans should pass laws to regulate their hunting. This action addresses the root problem, stabilizes the otter population, and in turn, maintains the kelp ecosystems.
The action humans can take to ensure that sea otters continue their function as a keystone species in their environment would be to pass laws to regulate the hunting of sea otters. This action addresses the issue at its root cause, which is the overhunting of sea otters, leading to their decline. By regulating hunting, the population of sea otters can be stabilized, which in turn will keep the sea urchin populations in check, and thereby maintaining the kelp ecosystems.
While establishing a refuge in the Atlantic Ocean and planting more kelp may help in some ways, they do not address the root problem. Moreover, destroying sea urchins involves negatively affecting another species, which is not a sustainable or ethical solution.
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Answer:
The correct answer will be-short life span and rapid reproductive.
Explanation:
Fruit flies or Drosophila melanogaster is a model organism used to study the principles of genetics as:
1. Short life span- they have a very short life span about 40-50 days in which they complete their life cycle.
2. Reproduction- The reproduction in an organism is very rapid that is they reproduce and produce a large number of offsprings in a short period of time.
Thus, scientist uses them to study genetics and observe traits in a small period of time.
b. marsupials.
c. placentals.
d. bird-like.