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user100 [1]
3 years ago
14

A mistake by cellular machinery, or damage from an environmental agent such as radiation may produce a(n) ____, which is a perma

nently altered segment of dna.
Biology
1 answer:
Elza [17]3 years ago
6 0

Mutated gene

A mistake by cellular machinery, or damage from an environmental agent such as radiation may produce a mutated gene which is a permanently altered segment of dna.  

A gene mutation is a perpetual change in the DNA sequence that forms a gene which makes the sequence different from what is present in most people. Gene mutations can be classified into; hereditary mutation (changes inherited from parents) and somatic mutation (changes caused by environmental factors such as ultraviolet radiation from the sun).


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A 53-year-old man presents to the emergency department with a chief complaint of inability to form words, and numbness and weakn
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Answer:

Explanation:

This is a stroke and the site of injury is the left side of the brain, this occur when the flow of oxygen-rich blood to a portion of the brain is blocked. Without oxygen, brain cells start to die after a few minutes.

A stroke occurs if their sudden bleeding in the left side of the brain, the right of the body will be affected, producing some of the following: numbness and weakness of the right arm and leg Speech problems (inability to form words). Amongst other symptoms.

The left side of the brain is responsible for controlling the right side of the body.

Stroke may occurs at any age and strock risk increase with age

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headaches, lethargy or feeling tired, cravings, muscle pain, nausea, bloating and even insomnia.

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What does it mean for an environment to be isotonic?(1 point)
HACTEHA [7]

A solution to be isotonic refers to b) The concentration of solute in the environment and the concentration inside the cell are at equilibrium.

  • Isotonic solution is the solution that have equal concentration of solute on both sides of the solution separated by a membrane.
  • If a cell is kept in an isotonic solution that means the concentration of the solute inside the cell is the same as that of the outside then the movement of solvent does not occur between the cell and the external environment.
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0.9% normal saline is an example of isotonic solution.

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brainly.com/question/17211905

4 0
2 years ago
Indicate whether each statement is true or false: 1. Compliance is the tendency for blood vessel volume to increase as blood pre
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Answer:

1. False

2. False

3. True

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1. Compliance is the capacity of a container to increase in size to allow it hold more content. Blood vessel, arteries and veins expand (increase in volume) to be able to accommodate a surge in blood flow, which is as a result of an increase in pressure of the blood from the heart pumping of the blood

Therefore, compliance in the tendency for blood vessel volume to increase as the blood pressure <em>increases</em> not decrease

The statement is false

2. A large compliance is indicative of being highly sensitive to changes in pressure

Compliance, C = ΔV/ΔP

From the above equation, a blood vessel with a large compliance, exhibit a large increase in volume when the increase in pressure is small

Therefore, the statement 'Blood vessels with a large compliance exhibit a small increase in volume when pressure increases a small amount; is false

3. The compliance of the vein ranges from 10 to 20 times (30 times in some literature) greater than arteries. A factor which can be affected by the vascular smooth muscle contraction or relaxation

Therefore, the statement, 'venous compliance is approximately 24 times larger than arterial compliance, so as venous pressure increases the volume of veins greatly increases' is true

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