Unit Quiz

What proteins are responsible for the contraction of a muscle? A. Actin and myosin B. Synapse and axon C. Pepsin and trypsin D. Testosterone and estrogen

A. Actin and myosin

Which of the following functions is an example of how the skeletal and neuromuscular system work together? A. Body movement B. Organ protection C. Pathogen protection D. Calcium storage

A. Body movement

Which of the following terms refers to the partially digested food leaving the stomach? A. Chyme B. Pepsin C. Bolus D. Lactase

A. Chyme

Which of the following is where melanocytes are found? A. Epidermis B. Dermis C. Hypodermis D. Sebaceous glands

A. Epidermis

Which of the following parts of an endocrine system can be found in the brain? A. Hypothalamus B. Parathyroid C. Adrenal D. Pancreas

A. Hypothalamus

Molecules are broken down into smaller pieces by the churning of muscles in the stomach. Which of the following is this an example of? A. Mechanical digestion B. Chemical digestion C. Enzymatic digestion D. Peristalsis

A. Mechanical digestion

Which of the following is a nonspecific barrier of the immune system? A. Mucus B. Antibodies C. Interferons D. B cells

A. Mucus

Which of the following is an example of an ionic compound? A. NaCl B. CO C. C6H12O6 D. H2O

A. NaCl

What tool and unit would be used to find the volume of a brick? A. Ruler and cm3 B. Ruler and m3 C. Balance and g D. Graduated cylinder and mL

A. Ruler and cm3

What is the name of the structure that releases an enzyme that breaks down starch in the mouth? A. Salivary gland B. Pancreas C. Liver D. Gallbladder

A. Salivary gland

This chemical reaction equation is an example of what type of reaction? H2 + 2O → H2O A. Synthesis B. Decomposition C. Single displacement D. Double displacement

A. Synthesis

Which of the following is an example of a long bone? A. Tibia B. Rib C. Skull D. Pelvis

A. Tibia

Which of the following substances describes the fluid that contains urea, water, and salts that is released through the urethra? A. Urine B. Filtrate C. Blood D. Nephron

A. Urine

Which of the following instruments would most accurately measure 0.1 mL of a liquid? A. A 50-mL beaker B. A micropipette C. A graduated cylinder D. An Erlenmeyer flask

B. A micropipette

According to the graph, which of the following identifies when fertilization is most likely? A. Between day 0 and 7 B. After luteinizing hormone (LH) levels peak and begin to decline C. Before ovulation D. When estrogen levels are highest

B. After luteinizing hormone (LH) levels peak and begin to decline

Which of the following would result from a decrease in body temperature? A. Blood vessels near the surface of the body would dilate. B. Blood vessels near the surface of the body would constrict. C. Sebaceous glands would excrete water. D. Cheeks would become more flush.

B. Blood vessels near the surface of the body would constrict.

In which of the following body structures are white blood cells produced? A. Muscle B. Bone C. Glands D. Skin

B. Bone

A cut reaches the sebaceous glands and hair follicles. The cut has reached which layer(s) of the skin? A. Epidermis only B. Epidermis and dermis C. Hypodermis and dermis D. Hypodermis and epidermis

B. Epidermis and dermis

During inhalation, where would you expect to find a higher concentration of oxygen? A. In the capillaries B. In the alveolar air space C. In the pulmonary artery D. In the heart

B. In the alveolar air space

Which structure is where female gametes are produced? A. Cervix B. Ovary C. Fallopian tube D. Uterus

B. Ovary

Which of the following statements best describes the subatomic particles that make up an atom? A. Protons and electrons are about the same size and are found in the nucleus. B. Protons and neutrons have about the same mass and can be found in the nucleus. C. Electrons are found in the nucleus and make up most of the mass of an atom. D. Protons are the only particles with mass and can be found in the nucleus.

B. Protons and neutrons have about the same mass and can be found in the nucleus.

Which of the following blood vessels carries deoxygenated blood from the heart to the lungs? A. Pulmonary vein B. Pulmonary artery C. Aorta D. Vena Cava

B. Pulmonary artery

Where does blood flow next after being oxygenated in the lungs? A. Pulmonary artery B. Pulmonary vein C. Inferior vena cava D. Aorta

B. Pulmonary vein

Which of the following parts of the genitourinary system regulates blood pressure? A. Ureter B. Renin C. Bladder sphincters D. Heart

B. Renin

Which of the following terms is used to describe the amount of air in a normal inhalation or exhalation? A. Perfusion B. Tidal volume C. Ventilation D. Residual volume

B. Tidal volume

Which structure connects the throat to the lungs? A. Alveoli B. Trachea C. Bronchi D. Surfactant

B. Trachea

A substance in a solid state is put on a hot plate with a thermometer. Every minute, the temperature of the substance is recorded. According to the graph, what is happening to the substance? A. As heat is added, the substance is becoming more and more dense. B. As heat is added, the particles holding the substances together are becoming stronger. C. As heat is added, the forces holding the particles together are breaking, changing the state. D. As heat is added, the substance is maintaining room temperature by absorbing the energy.

C. As heat is added, the forces holding the particles together are breaking, changing the state.

Which of the following is classified as a carbohydrate? A. DNA B. Endorphin C. Glycogen D. Amylase

C. Glycogen

Which of the following describes the function of the plasma membrane? A. It provides energy to the cell. B. It helps to builds proteins. C. It maintains the cell's internal environment. D. It produces adenosine triphosphate (ATP) for cells.

C. It maintains the cell's internal environment.

Which of the following cell structures contain cristae? A. DNA B. Smooth endoplasmic reticulum C. Mitochondria D. Peroxisomes

C. Mitochondria

An experiment is conducted to test the effects of caffeine on heart rate. Four trials are set up. In each trial, a daphnia, a small water organism, is given different amounts of caffeine. After 5 minutes, the number of heart beats are counted for 1 minute. The results are shown in the table. Which of the following is the dependent variable in this experiment? A. Length of time measuring heart beats. B. Amount of caffeine. C. Number of heart beats. D. Type of organism.

C. Number of heart beats.

Which of the following structures releases insulin and glucagon? A. Adrenal B. Hypothalamus C. Pancreas D. Pituitary

C. Pancreas

What is the name for the hormone responsible for male secondary sex characteristics? A. Luteinizing hormone B. Estrogen C. Testosterone D. Follicle-stimulating hormone

C. Testosterone

An experiment is conducted to test the effects of caffeine on heart rate. Four trials are set up. In each trial, a daphnia, a small water organism, is given different amounts of caffeine. After 5 minutes, the number of heart beats are counted for 1 minute. The results are shown in the table. Based on the data, daphnia that are given too much caffeine may die. Which of the following experimental practices would strengthen the conclusion made about daphnia and caffeine? A. The experimenter should test the experiment with other substances besides caffeine. B. The experimenter should test the experiment using different organisms. C. The experimenter should test each condition more than once. D. The experimenter should collect data after 10 minutes instead of 5 minutes.

C. The experimenter should test each condition more than once.

The diagram shows two substances contained in equal size containers. Which of the following statements best explains the density of the substances? A. Both substances have equal densities because they have equal volumes. B. The first substance is less dense because it has more volume and less mass. C. The first substance is less dense because it has less mass in the same amount of volume. D. The first substance is denser because it has less mass in the same amount of space.

C. The first substance is less dense because it has less mass in the same amount of volume.

A purple-flowered pea plant and a white-flowered pea plant were crossed. The allele for purple flowers is dominant, and the allele for white flowers is recessive. Of 1,000 offspring, 498 were purple-flowered pea plants, and 502 were white-flowered peas plants. Based on these results, which of the following can be concluded about the parent plants? A. The white-flowered pea plant is homozygous dominant. B. The white-flowered pea plant is heterozygous. C. The purple-flowered pea plant is heterozygous. D. The purple-flowered pea plant is homozygous dominant.

C. The purple-flowered pea plant is heterozygous.

An experiment is conducted to test the effects of caffeine on heart rate. Four trials are set up. In each trial, a daphnia, a small water organism, is given different amounts of caffeine. After 5 minutes, the number of heart beats are counted for 1 minute. The results are shown in the table. Which of the following hypotheses is supported by the data? A. All organisms increase their heart beats when given caffeine. B. Organisms decrease their heart beats when exposed to caffeine. C. When given caffeine, daphnia increase their heart rate. D. When given caffeine, daphnia decrease their heart rate.

C. When given caffeine, daphnia increase their heart rate.

Which of the following diseases is caused by a virus that infects T cells? A. Allergies B. Asthma C. Autoimmune D. Acquired immune deficiency syndrome (AIDS)

D. Acquired immune deficiency syndrome (AIDS)

Which type of tissue would you find in the heart? A. Skeletal muscles B. Striated muscle C. Smooth muscles D. Cardiac muscles

D. Cardiac muscles

An experiment is conducted to test the effects of caffeine on heart rate. Four trials are set up. In each trial, a daphnia, a small water organism, is given different amounts of caffeine. After 5 minutes, the number of heart beats are counted for 1 minute. The results are shown in the table. Which of the following explanations states a logical cause and effect of caffeine on the heart beats of daphnia? A. Daphnia need caffeine to pump blood throughout their body. B. Caffeine causes daphnia to lower their heart rates over time. C. Caffeine does not affect daphnia's heart rate. D. Daphnia given too much caffeine may die.

D. Daphnia given too much caffeine may die.

In which of the following actions is the autonomic nervous system engaged? A. Lifting weights B. Holding your breath C. Walking D. Digestion

D. Digestion

Which of the following best describes the relationship between a chromosome and a gene? A. Each gene forms its own chromosome. B. Each chromosome contains a single gene. C. Each gene contains a specific number of chromosomes. D. Each chromosome contains a specific number of genes.

D. Each chromosome contains a specific number of genes.

Joseph and Demarius conducted an experiment on the activity of an enzyme. They tested whether the enzyme activity changed at different temperatures from 10° to 60°C. Based on the graph, which of the following best describes the relationship between enzyme activity and temperature? A. Enzyme activity is greatest at temperatures below 30°C. B. Enzyme activity decreases between 20° and 30°C. C. Enzyme activity is unaffected by temperature changes. D. Enzyme activity is greatest at 40°C.

D. Enzyme activity is greatest at 40°C.

Which of the following is a result of the adrenal gland releasing epinephrine into the blood? A. Weight gain B. Increased muscle growth C. Breakdown of glycogen D. Increase in heart rate

D. Increase in heart rate

Which type cell helps protect against disease? A. Hemoglobin B. Stem C. Erythrocyte D. Leukocyte

D. Leukocyte

Which of the following structures is medial to the large intestine? A. Stomach B. Pancreas C. Liver D. Small Intestine

D. Small Intestine

Which of the following structures stores waste before it is released from the body? A. Kidney B. Urethra C. Ureters D. Urinary bladder

D. Urinary bladder