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Nikitich [7]
3 years ago
10

Presbycusis and tinnitus are examples of difficulties with which of the follows senses

Biology
1 answer:
Otrada [13]3 years ago
7 0

Answer: aging hearing

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The city of Los Angeles wants to know if there is a connection between physical fitness and air pollution. Fifty volunteers from
zheka24 [161]

Answer:

Control group: volunteer stationary bike riders in a pollution-free chamber

Experimental group: volunteer stationary bike riders in a chamber filled with air pollutants common to Los Angeles

Independent variable: exposure to air pollution

Dependent variable: The heart rates (physical fitness) of the volunteer riders.

Explanation:

In a scientific experiment, data is compared between the control group and experimental group to ascertain the effect of the independent variable on the dependent variable. A control group is the group in an experiment that is not treated with the independent variable i.e. the independent variable is controlled while the experimental group is the group that is treated with an independent variable.

N.B: The independent variable is the variable controlled by the experimenter in order to influence the dependent variable (measurable outcome).

In this experiment, the independent variable is the AIR POLLUTION the volunteer riders are exposed to while the dependent variable is the PHYSICAL FITNESS/ HEART RATES of the volunteer riders, which is dependent on the exposure to air pollution (independent variable).

The control group in this experiment is the volunteer riders placed in a POLLUTION-FREE CHAMBER where the independent variable cannot influence or have any effect on the measurable variable (dependent). The experimental group is the volunteer riders placed in a CHAMBER FILLED WITH AIR POLLUTANTS. The independent variable (air pollution) has been changed in the experimental group.

4 0
3 years ago
Which of the following statements about cardiac muscle is true? a. Cardiac muscle is like smooth muscle, because smooth muscle h
Aleonysh [2.5K]

Answer:

c. Cardiac muscle contains bands like skeletal muscle, but its contractions are involuntary like smooth muscle.

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Cardiac muscle is also referred to as myocardium and it's one of the three (3) muscles found only in the heart of vertebrates, the other two (2) being smooth muscle tissue and skeletal muscle tissue.

Cardiac muscle contains bands like skeletal muscle referred to as sarcomeres (contractile units), but its contractions are involuntary like smooth muscle and it's typically being regulated by the sinoatrial node of the heart.

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2 years ago
Que nombre reciben las articulaciones oseas que unen la cavidad craneal
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Las coyunturas 
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5 0
3 years ago
Match the following. Match the items in the left column to the items in the right column.
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Idk sorryhbjbjbiibink bobohonob
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3 years ago
Predict how a lack of resources (food, water, shelter) would influence population size. Do you think the lack of availability wo
KonstantinChe [14]

Answer:

a lack of resources would most likely decrease a population size because it will limit growth and decrease survival rates. There will also be more competition.

Explanation:

Please don't plagiarize. Thanks :)

4 0
3 years ago
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