Answer:
The correct answer is mesosphere.
Explanation:
The atmosphere exhibits five distinct layers, which are determined by the modifications in temperature that take place with the upsurging altitude. These are troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Of the mentioned layers, the mesosphere, that is, the layer present above the stratosphere is considered as the coldest layer of the atmosphere. The coldest portions of the atmosphere are situated in this layer and can reach up to -90 degree Celsius.
b. False
Bones provide structure and protection for the body, they work with muscles and joints to allow movement and protect various organs. Therefore, the correct answer is True.
The statement that bones provide both structure and protection for the body is True. Bones provide structure by working together with muscles and joints to allow movement. Bones also protect the body's various organs. For example, your skull protects your brain, your rib cage protects your heart and lungs, and your spine protects your spinal cord.
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C. The six-kingdom system has three domains: two domains separate all prokaryotic organisms into two new groups.
Kelp plants have been known to grow up to b. 2 inches per day. Correct option is B.
Kelp is a type of marine algae that belongs to the group of brown algae known as Phaeophyceae. It is a multicellular organism that forms large underwater structures known as kelp forests in shallow, nutrient-rich coastal waters. These kelp forests are highly productive and provide essential habitats for a diverse range of marine organisms.
Kelp has an impressive growth rate compared to many other plants. Its growth rate is influenced by several factors, including environmental conditions and the species of kelp. Some kelp species can grow incredibly quickly under optimal conditions. Kelp is a type of large brown algae that grows in underwater "forests" in shallow, nutrient-rich marine environments. They are known for their rapid growth rates, with some species capable of growing several centimeters or inches per day under optimal conditions.
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Answer:
D. fs
Explanation:
b. 1 and 3
c. 1 only
d. 1, 2, and 3
Renal autoregulation is the ability of the kidneys to maintain a relatively constant GFR or glomerulofiltration rate despite fluctuating blood pressure. Autoregulation is a remarkable property of multiunit smooth muscles of small arteries and arterioles to respond to changes in internal and external pressure. The blood vessels in the human body react by contracting whenever the blood pressure is elevated and by expanding when the blood pressure is reduced. On the other hand, if there is an elevation or reduction of the external interstitial pressure, it results in dilation and contraction, respectively. The lowest autoregulating pressure is about 60 mmHg. By a further reduction in perfusion pressure, RBF is sharply reduced.
Kidneys are the important organs of the excretory system involved in the removing of nitrogenous wastes from the body. Apart from this, they are involved in maintaining the acid-base balance, electrolytes and thus contibuting in homeostatis of the body.
The structural and functional unit of a kidney is called a nephron. Glomeruli of the nephrons are involved in the process of filtering the waste products and excess of fluids from the blood. This process is called the glomerular filtration. GFR or the glomerular filtration rate is the rate at which the fluids are filtered from the glomerulus of the nephron. A constant GFR is very essential for the healthy functioning of kidneys. Any change in the arterial pressure can injury the nephrons of the kidney. Hence a constant GFR despite of changes in the blood pressure is maintained by a process called the renal autoregulation.
Renal autoregulation together with the tubuloglomerular feedback help in maintaining a constant GFR inspite of changes in the sodium chloride levels in the urinary filtrate. An elevated level of sodium, results in constriction of the afferent arteriole, decreasing renin secretion and thus, lowering the GRF. Any decrease in sodium levels stimulates more renin production, constricts the efferent arteriole and increases the GRF.
Thus, renal autoregulation is the ability of the kidneys to maintain a constant GRF rate despite changes in the blood pressure.