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abruzzese [7]
3 years ago
13

A plausible explanation of Rachel Carson's description of a photo from the ocean's deep

Biology
1 answer:
MakcuM [25]3 years ago
8 0
The answer is False
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As you are cooking, your hand brushes up against a hot pan. You quickly pull your hand away. What type of stimulus is this?
slava [35]
Stimulus is something that causes a psychological response. It can be internal or external. The stimulus is the contact with the hot pan. It is an external stimulus. Sense organs, such as the sensory receptors in the skin are sensitive to external stimulus. The quickly pull of your hand is a reflex action.
The contact causes a nerve impulse that will travel to the spinal cord via the sensory neurons.<span>To respond to the stimulus of the reflex arc, the muscle needs to contract to pull the hand quickly away from the hot pan.</span>
8 0
3 years ago
Read 2 more answers
Your heart has four valves. Normally, these valves open to let blood flow through your heart, and then shut to keep it from flow
Ulleksa [173]

Regurgitation influences the flow of blood by mixing the oxygen-poor blood with the oxygen-rich blood. Due to this, the heart has to pump more to oxygenate the entire body, leading to the rapid, and fluttering heartbeat. The tissues get oxygenated but regurgitation could be fatal, as the heart cannot function overtime forever.  

Valve prolapse influences the flow of blood when the flow of blood backs up. This leads to an irregular or racing heartbeat. Even at certain occasions, the blood can flow back to the lungs. However, there is not a huge influence in the oxygenation of the body tissues.  

Stenosis makes the ventricles to pump overtime to get enough blood through, and in the process, the ventricles thicken. This functions for a while, however, it will result in heart failure as the heart cannot do it for entire life. The tissues are oxygenated, but it will be an issue due to overtime.  


7 0
3 years ago
when you run, the impact of your foot striking the ground creates a force that is how many times your body weight?
mash [69]

Answer:

3 times your body weight

8 0
3 years ago
Which muscle extends the fingers?
weeeeeb [17]

Answer:

c. extensor digitorum

Explanation:

the extensor digitorum communis extends the phalanges, then the wrist, and finally the elbow. It tends to separate the fingers as it extends them. In the fingers, the extensor digitorum acts principally on the proximal phalanges, acting to extend the metacarpophalangeal joint.

5 0
3 years ago
Select the true statement. A) RNA is mostly single-stranded; DNA is always double-stranded. B) RNA and DNA usually have identica
Keith_Richards [23]
A is true, the others are not. I would assume they count the mRNA and tRNA in protein synthesis as 'double stranded'
3 0
3 years ago
Read 2 more answers
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