Answer:
(1)They are usually multi-nucleated.
Explanation:
Cardiac muscles are one of the three muscles found in the human body (the other two being skeletal and smooth muscles). It is the only type of muscle found in the heart. Cardiac muscle cells have a single nucleus unlike the skeletal muscle cells.
They possess many large mitochondria in their cell, which enable them actively carry out the process of aerobic respiration. The cardiac muscles contains an enormous amount of myoglobin pigment, which enable them store and transport oxygen. Due to the high glucose in its cell, excess glucose is readily stored as Glycogen, making it rich in glucose.
Based on the explanation, being MULTI-NUCLEATED is not a feature of cardiac muscle fibers.
In some types of research the target population might be as broad as all humans, but in other types of research the target population might be a smaller group such as teenagers, pre-school children or people who misuse drugs.
It is more or less impossible to study every single person in a target population so psychologists select a sample or sub-group of the population that is likely to be representative of the target population we are interested in.
This is important because we want to generalize from the sample to target population. The more representative the sample, the more confident the researcher can be that the results can be generalized to the target population.
One of the problems that can occur when selecting a sample from a target population is sampling bias. Sampling bias refers to situations where the sample does not reflect the characteristics of the target population.
Answer:
to treat illnesses (number 3)
Explanation:
:3
67: decrease
68: remain the same
Answer:
Explanation:
When the sample of hot metal is placed inside the water, the metal gives off heat to the water: the temperature of the metal decreases while the temperature of the water increases, until the two reach an equilibrium temperature.
The heat given off by the metal is equal (in magnitude) to the heat absorbed by the water, so we can write:
where:
is the mass of the metal
is the specific heat of the metal
is the initial temperature of the metal
is the equilibrium temperature
is the mass of the water
is the specific heat of water
is the initial temperature of the water
And solving for , we find the specific heat of the metal:
