BIO Exam 3 Practice Questions

A duplicated chromosome costs of____ sister chromatid(s)?

2

A pool of cells s treated with a chemical that halts progress through the cell cycle. In which stage of the cell cycle would most cells be found?

Interphase

Blood flows rapidly within the arterial system but slows dramatically as it enters the capillaries. What is the benefit of having blood move slowly through the capillaries?

It ensures that the blood has enough time to exchange material with the surrounding cells.

After about an hour of basking in the sun, the body temperature of the marine iguana reaches 37°C, and the animal dives into the water to feed. In the water, its body temperature rapidly drops, and the iguana must return to the rocks to warm up. This process is an example of

Negative Feedback

During blood clotting, a broken blood vessel triggers a cascade of factors that collectively reduce blood loss. In this example, the clotting factors are functioning as part of

Positive Feedback loop

According to the image below, during which phase of the cell cycle does the cell increase in size in preparation for division? mc005-1.jpg

Region 2

A muscle contracts, which of the following things happens?

The sarcomeres become smaller.

air that is entering the lungs has

a higher concentration of oxygen and lower a concentration of carbon dioxide that air in the alveolus

A researcher is recording the process of bacteria cell division using time- lapse microscopy. Which of the following processes would she be observing?

binary fission

A newborn is diagnosed shortly after birth with a rare heart defect that prevented the valve between the left atrium and the left ventricle from fully forming. Which of the following would be an expected outcome of this defect?

body cells would receive less oxygen- rich blood than normal.

For a human to inhale, the rib muscles and the diaphragm must

contract, decreasing pressure inside the lungs.

A scientist wishing to generate cancerous cells in vitro could subject the cells to which of the following procedures?

expose of cells to chemicals that disrupt mitosis

If the glomerulus remained intact but other capillaries were not in close physical contact with nephrons, which of the following functions would NOT be lost?

filtration of the plasma

As you are driving to school one morning, the driver in front of you suddenly slams on his brakes and turns right without using his turning signal. Despite the potentially irritating situation, you remain calm because your ________ helped you control your emotions.

limbic system

Blood leaving the right ventricle of the heart travels next to the

lungs

Another name for the "pacemaker" of the hear t is the

sinoatrial (SA) node

At high altitudes, gases are less concentrated. You might gasp for air because

the amount of oxygen that could diffuse into your blood will be decreased

As you take this exam, which part of your brain is helping you decide which answer is correct?

the cerebral cortex

After certain knee injuries, patients experience a swelling because of an accumulation of fluid within the knee. This condition is referred to as "water on the knee." Which of the following is a likely source of this fluid?

the synovial sac

Bending your elbow involves

the use of voluntary muscles