Human Physiology Quiz

An individual eats a hamburger. Which two systems must interact to transfer nutrients in the hamburger to human muscle?

• respiratory and excretory

• digestive and immune

• digestive and circulatory

• circulatory and respiratory

A pulse can be detected most easily in

• an artery

• a capillary

• a vein

• a lacteal

It may be harmful when people compete to see who can hold their breat the longest underwater. Without oxygen, brain cells

• cannot make enough ATP

• have too few mitochondria

• make too much enzymes

• have too much water

In the lab activity Making Connections, an experiment was designed to test the effect of exercise on the ability to squeeze a clothespin. The number of times the clothespin was squeezed served as the

• independent variable

• dependent variable

• hypothesis

• control

Base your answer to the following question on The diagram below shows a sequence of events that often occurs in human muscle cells.

The substance represented by letter X is most likely

• hemoglobin

• glycogen

• ethyl alcohol

• lactic acid

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.

Muscle fatigue occurs during this activity when

• carbon dioxide is used up in the muscle cells

• simple sugar is converted to starch in the muscle cells

• proteins accumulate in mitochondria in the muscle cells

• certain waste products collect in the muscle cells

Students in a high school biology class conducted an investigation on pulse rates. The thirty students performed three different activities and determined their pulse rates. Each activity was done three times. The average is shown in the graph below. he students want to improve the validity of their conclusion. The best way to accomplish this is to

• change the hypothesis

• repeat the investigation several times

• increase the number of variables

• increase the height of participants in each group