- 1 What are 4 things that contribute to low resistance?
- 2 How do you become resistant to antibiotics?
- 3 What are the factors that affect resistance?
- 4 What factors does resistance depend on?
- 5 How common is antibiotic resistance?
- 6 Is antibiotic resistance permanent?
- 7 What is the biggest cause of antibiotic resistance?
- 8 What is the relation between current and resistance?
- 9 What is the resistance equation?
- 10 Why does the length of a wire affect resistance?
- 11 Does resistivity depend on length?
- 12 Is resistance directly proportional to length?
- 13 What is a specific resistance?
What are 4 things that contribute to low resistance?
Decreased host resistance can be due to systemic factors affecting the patient’s healing response, local wound characteristics, or operative characteristics, as follows: Systemic factors – Age, malnutrition, hypovolemia, poor tissue perfusion, obesity, diabetes, steroids, and other immunosuppressants.
How do you become resistant to antibiotics?
That’s called antibiotic resistance. Some bacteria can naturally resist certain kinds of antibiotics. Others can become resistant if their genes change or they get drug- resistant genes from other bacteria. The longer and more often antibiotics are used, the less effective they are against those bacteria.
What are the factors that affect resistance?
There are several factors that affect the resistance of a conductor;
- material, eg copper, has lower resistance than steel.
- length – longer wires have greater resistance.
- thickness – smaller diameter wires have greater resistance.
- temperature – heating a wire increases its resistance.
What factors does resistance depend on?
The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.
How common is antibiotic resistance?
Antibiotic resistance is one of the biggest public health challenges of our time. Each year in the U.S., at least 2.8 million people get an antibiotic – resistant infection, and more than 35,000 people die.
Is antibiotic resistance permanent?
Dutch research has shown that the development of permanent resistance by bacteria and fungi against antibiotics cannot be prevented in the longer-term. The only solution is to reduce the dependence on antibiotics by using these less.
What is the biggest cause of antibiotic resistance?
The main cause of antibiotic resistance is antibiotic use. When we use antibiotics, some bacteria die but resistant bacteria can survive and even multiply. The overuse of antibiotics makes resistant bacteria more common. The more we use antibiotics, the more chances bacteria have to become resistant to them.
What is the relation between current and resistance?
The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.
What is the resistance equation?
Resistance has units of ohms (Ω), related to volts and amperes by 1 Ω = 1 V/A. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.
Why does the length of a wire affect resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. More collisions mean more resistance. Second, the cross-sectional area of the wires will affect the amount of resistance.
Does resistivity depend on length?
The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.
Is resistance directly proportional to length?
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. The resistance of a conductor, or circuit element, generally increases with increasing temperature.
What is a specific resistance?
Definition of ‘ specific resistance ‘ 1. the electrical property of a material that determines the resistance of a piece of given dimensions. It is equal to RA/l, where R is the resistance, A the cross-sectional area, and l the length, and is the reciprocal of conductivity. It is measured in ohms.