biology

mitochondria

A cell from heart muscle would probably have an unusually high proportion of

sensory neurons

A signal that the bladder is full is sent to the central nervous system by

sequence and number of amino acids is different.

Although there are a limited number of amino acids, many different types of proteins exist because the

circulatory and respiratory

Carbon dioxide is produced as cells break down nutrients for energy. Which of the following pairs of systems would participate in removing the carbon dioxide from the body?

have nuclei.

Eukaryotic cells are differentiated from prokaryotic cells because eukaryotic cells

Bacterial diseases respond to antibiotics; viral diseases do not

How do human diseases caused by bacteria and diseases caused by viruses react to antibiotics?

mitochondria

In aerobic respiration, the Krebs cycle (citric acid cycle) takes place in

waste removal

In order for the body to maintain homeostasis, the chemical decomposition of food to produce energy must be followed by

are unable to fight off these pneumonia-causing organisms

Individuals with HIV sometimes contract a pneumonia infection that is rare in the rest of the population because people with HIV

stimulate the production of antibodies which can be manufactured later in response to infection

Injecting a person with a killed-bacteria vaccine can protect that individual from a disease because the proteins of the killed bacteria

diluting with water

Maltose can be broken down into glucose molecules by the enzyme maltase. Which of the following would slow the reaction rate?

each half of the original DNA molecule is joined with a new complementary DNA strand.

Semi-conservative replication of DNA refers to the idea that

applying ice to the bite area.

Some snake venoms are harmful because they contain enzymes that destroy blood cells or tissues. The damage caused by such a snakebite could best be slowed by

reflex reactions

Striking the tendon just below the kneecap causes the lower leg to jerk. Moving an object quickly toward the face can cause the eyes to blink shut. These are examples of

a nonspecific defense against infection.

Sweat and skin secretions contain a mixture of molecules that kills or limits the growth of many types of microbes. This control of microbes is an example of

promote production of antibodies

The Sabin vaccine is a liquid containing weakened polio viruses. Vaccinated individuals become protected against polio because the weakened viruses

semi-permeable.

The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other substances are blocked from entering, this membrane is called

changes the protein structure.

The clear protein of an egg white becomes opaque and firm when cooked because the heat

adrenaline secreted by the adrenal glands.

The fight-or-flight response includes greater heart output and a rise in blood pressure. This response is due to

light-dependent.

The first stage of photosynthesis in a chloroplast is

chemical receptors

The homeostatic mechanism in humans that regulates blood pH depends on the feedback of information from

two layers of lipids organized with the nonpolar tails forming the interior of the membrane.

The plasma membrane of a cell consists of

coordinate muscles controlling breathing.

The respiratory system depends on the nervous system for signals to

An enzyme binds to a specific substrate (reactant) for the reaction catalyzed.

There are many different enzymes located in the cytoplasm of a single cell. How is a specific enzyme able to catalyze a specific reaction?

infections in uncovered tissues

What is the greatest danger to a patient who has had damage to the skin?

Golgi apparatus

Which cellular organelle is responsible for packaging the proteins that the cell secretes?

chlorophyll

Which molecule in plant cells first captures the radiant energy from sunlight?

signaling muscle tissues to contract

Which of the following is a function of the nervous system?

viruses

Which of the following require a host cell because they are not able to make proteins on their own?

thyroid

Which of these secretes a hormone that regulates the rate of metabolism of the body?