Explanation:
Blood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body
Some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching
There are four major blood groups determined by the presence or absence of two antigens: A and B on the surface of red blood cells
In addition to the A and B antigens, there is a protein called the Rh factor, which can be either present or absent creating the 8 most common blood types which are A+,A-.B+,B-O+,O-,AB+,AB-
Blood type is inherited and it is determined by the blood type of both father and mother
Blood type helps in DNA fingerprinting and forensic science and plays an important role in determining blood relations or to identify the suspect
b: Arteries always carry oxygenated blood.
c: Veins always carry deoxygenated blood.
d: Arteries carry blood away from the heart.
e: Veins carry blood toward the heart.
Answer:
a: There is a unidirectional blood flow.
d: Arteries carry blood away from the heart.
e: Veins carry blood toward the heart.
Explanation:
The human circulatory system includes three main types of blood vessels: arteries, veins, and capillaries. Arteries are the blood vessels that carry the oxygenated blood from the heart to various body tissues. Veins are the blood vessels that pick the deoxygenated blood from body tissues and deliver to the heart. Vena cava is the largest vein that reaches the right atrium of the heart and delivers the deoxygenated blood.
The blood from the right atrium is carried to the right ventricle and finally lungs via the pulmonary artery for oxygenated. The oxygenated blood from the lungs is carried to the left atrium of the heart by a pulmonary vein. The oxygenated blood from the left atrium is carried to the left ventricle and finally to the body tissues by branches of the aorta. This unidirectional blood circulation of the human body ensures efficient delivery of oxygenated blood to body tissues.
In general, blood follows a unidirectional flow in the body with arteries carrying blood away from the heart and veins bringing it back. Though it's typical for arteries to carry oxygenated blood and veins to transport deoxygenated blood, there are noteworthy exceptions, like in the case of pulmonary arteries and veins.
Characterizing blood flow in the human body involves understanding the function and direction of blood movement in arteries and veins. a: There is a unidirectional blood flow is correct; blood does flow in a single direction, moving out from the heart, delivering oxygen and nutrients to tissues, then returning the blood to the heart. d: Arteries carry blood away from the heart and e: Veins carry blood toward the heart are both accurate characterizations of blood flow as well.
However, b: Arteries always carry oxygenated blood and c: Veins always carry deoxygenated blood are not completely true. While it's generally correct that arteries carry oxygenated blood and veins carry deoxygenated blood, there are exceptions. For example, the pulmonary arteries carry deoxygenated blood from the heart to the lungs to pick up oxygen and expel carbon dioxide, while the pulmonary veins carry oxygenated blood back to the heart.
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In the situation where Jeremy is digging in the garden and feels the spade hit a rock, the functioning of sensory, relay, and motor neurons is crucial in his body's response to this stimulus.
When Jeremy was digging in the garden, he felt the spade hit a rock. This is sensation was facilitated by sensory neurons which picked up the external stimulation and sent the information in the form of electrical impulses from the nerves in his hands towards his spinal cord and brain. This sensory information travels to the brain via relay neurons, which are also known as interneurons. They reside within the central nervous system and transmit the signals from sensory neurons to appropriate areas of the brain for processing.
Upon processing the sensory data, the brain forms a motor response which is relayed back towards the muscles in his arms to stop digging. The 'stop digging' response is sent through motor neurons, which transmit the signals from the brain to the muscles in Jeremy's arms, causing him to stop the movement of the spade.
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b. False
A plant reaches its adult stage when it is ready to reproduce.
The statement “All plants reproduce several times before dying” is true. The answer is letter A. Plants can reproduce several times as long as it has the gametes needed for reproduction.
Desert environments lack water. All plants need water to survive. A waxy coating on plant leaves prevents water loss.
(these are the bullets that come after the question so if you copy/paste this it will mark the question as correct)
A.
all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA.
B.
it results in two nonidentical DNA molecules.
C.
each of the two DNA molecules will consist of one parental strand and one newly synthesized strand.
D.
of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA.
E.
one DNA strand is replicated continuously, while the other must be replicated discontinuously.