Biology - Exam 3 - Practice Test (3/3)

Front 1

Which pair of hormones is responsible for keeping blood glucose levels within normal ranges?
A) calcitonin and TSH
B) insulin and glucagon
C) thyroxine and thymosin
D) ADH and growth hormone
E) aldosterone and insulin

Back 1

insulin and glucagon

Front 2

What pollinates most gymnosperms?
A) small mammals
B) wind
C) birds
D) insects

Back 2

wind

Front 3

What two organs are considered to be part of the lymphatic system?
A) thalamus and hypothalamus
B) heart and lungs
C) spleen and thymus
D) gall bladder and kidneys
E) pancreas and liver

Back 3

spleen and thymus

Front 4

Gas exchange in the lungs occurs due to:
A) passive diffusion of gases between the blood and the alveolus.
B) active transport of gases between the blood and the alveolus.
C) facilitated diffusion of gases between the hemoglobin and the alveolus.
D) active transport of gases between hemoglobin and the alveolus.
E) facilitated diffusion of gases between the blood and the alveolus.

Back 4

passive diffusion of gases between the blood and the alveolus.

Front 5

Increases in plant length (such as overall height or branch and root length) result from cell division that occurs:
A) equally throughout the plant body.
B) from cell division of differentiated cells.
C) only from lateral meristems (cambiA) .
D) only in apical meristems at shoot and root tips.

Back 5

only in apical meristems at shoot and root tips.

Front 6

Ferns and mosses need water for sexual reproduction because:
A) water is required for sperm production.
B) pollen is transported to nearby plants by raindrops.
C) water is required for spore dispersal.
D) they have swimming sperm.

Back 6

they have swimming sperm.

Front 7

Which of these parts of the brain controls breathing and heart rate?
A) hypothalamus
B) cerebellum
C) thalamus
D) medulla
E) cerebrum

Back 7

medulla

Front 8

An essential nutrient is one that:
A) is required in large amounts.
B) can be found only in animal products.
C) cannot be made by the animal.
D) is used for energy storage.

Back 8

cannot be made by the animal.

Front 9

Tomatoes that are planted upside down still grow upright, displaying:
A) thigmotropism.
B) phototropism.
C) gravitropism.
D) amylotropism.
E) lumitropism.

Back 9

gravitropism.

Front 10

Which of the following characteristics helps differentiate between a monocot and a dicot?
A) whether the plant gains length from an apical or a lateral meristem
B) seeds covered by a fruit
C) number of flower parts
D) presence or absence of pollen grains
E) presence of vascular tissue

Back 10

number of flower parts

Front 11

Natural killer cells:
A) destroy body cells that have been invaded by viruses.
B) are a type of B cell.
C) are a type of T cell.
D) engulf and destroy bacteria.
E) are located on the skin.

Back 11

destroy body cells that have been invaded by viruses.

Front 12

Ventricles force blood directly into the:
A) arterioles.
B) venules.
C) veins.
D) arteries.
E) capillaries.

Back 12

arteries.

Front 13

Plasma is primarily:
A) water.
B) salt.
C) protein.
D) cells.
E) gases.

Back 13

water.

Front 14

Nonspecific internal defenses include:
A) plasma cells.
B) tears and saliva.
C) inflammation.
D) skin.
E) adaptive immune system.

Back 14

inflammation.

Front 15

If you remove red blood cells, white blood cells, and platelets from blood, what remains?
A) pure water
B) lymph
C) plasma
D) albumin

Back 15

plasma

Front 16

The autonomic nervous system controls:
A) integration in the brain.
B) the skeletal muscles.
C) the senses.
D) reflexes.
E) contractions of involuntary muscles.

Back 16

contractions of involuntary muscles.

Front 17

Which division has been reduced to one remaining species?
A) bryophytes
B) liverworts
C) cycads
D) ginkgos
E) conifers

Back 17

ginkgos

Front 18

Why do mosses and liverworts need to live in a moist environment?
A) the production of flowers
B) reproduction
C) the production of fruits
D) greater seed production
E) root formation

Back 18

reproduction

Front 19

What type of digestion takes place inside the mouth?
A) absorption only
B) ingestion only
C) mechanical digestion only
D) chemical digestion only
E) mechanical and chemical digestion

Back 19

mechanical and chemical digestion

Front 20

Local hormones are:
A) biochemicals released from one cell and transferred via the blood to other (target) cells.
B) chemicals that are released by a cell into the surrounding extracellular fluid and affect only other nearby cells.
C) electrical signals that move between adjacent cells.
D) released from a nerve cell and diffuse across a synaptic gap to influence its target cell.
E) released from gap junctions directly into the cytoplasm of the connected cell.

Back 20

chemicals that are released by a cell into the surrounding extracellular fluid and affect only other nearby cells.

Front 21

In the lungs, oxygen moves from air into blood by:
A) diffusion.
B) bulk flow.
C) facilitated diffusion.
D) active transport.
E) osmosis.

Back 21

diffusion.

Front 22

What is the cardiac cycle?
A) the alternating relaxation and contraction of the heart chambers
B) the movement of blood from systemic to pulmonary circulation
C) the movement of blood from the heart to the lungs and then back to the heart
D) the passage of electrical impulses from the AV node to the SN node to heart muscle

Back 22

the alternating relaxation and contraction of the heart chambers

Front 23

It is important that the atrioventricular (AV) node produce a delay between the contraction of the atria and the contraction of the ventricles because this allows the:
A) atria to contract in smooth synchrony.
B) ventricles to fill to capacity.
C) ventricles to contract in smooth synchrony.
D) heart to rest for a brief period of time.

Back 23

ventricles to fill to capacity.

Front 24

All of the following can bind to hemoglobin EXCEPT:
A) oxygen.
B) carbon dioxide.
C) nitrogen.
D) carbon monoxide.

Back 24

nitrogen.

Front 25

Axons:
A) act independently of the cell body.
B) have neurotransmitter receptors.
C) decide whether to transmit an action potential.
D) carry an action potential in the direction of a synapse.
E) form the gray matter of the brain and spinal cord.

Back 25

carry an action potential in the direction of a synapse.

Front 26

Which part of the digestive tract has the lowest pH?
A) stomach
B) large intestine
C) rectum
D) small intestine
E) pancreas

Back 26

stomach

Front 27

Motor neurons:
A) connect to the effector organs.
B) carry impulses to the brain.
C) store memories.
D) carry impulses to the spinal cord.
E) contract.

Back 27

connect to the effector organs.

Front 28

Cells that produce antibodies and provide future immunity against similar pathogens are:
A) mast cells.
B) B cells.
C) dendritic cells.
D) natural killer cells.
E) T cells.

Back 28

B cells.

Front 29

Memory, sensory processing, motor responses, creativity, and higher intellectual functions are carried out by the:
A) cerebellum.
B) amygdala.
C) cerebrum.
D) hypothalamus.
E) medulla.

Back 29

cerebrum.

Front 30

The cells that line the human respiratory passages secrete:
A) water.
B) enzymes.
C) blood.
D) mucus.
E) hormones.

Back 30

mucus.

Front 31

To limit water loss, land plants developed:
A) flowers.
B) lignan.
C) a cuticle.
D) vascular tissue.
E) stomata.

Back 31

a cuticle.