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Exam 1 (Ch1&2)
Exam 2 (Ch3,4,5)
Exam 3 (Ch7,8,9)
Exam 4 (Ch6,11,12)
Exam 5 (Ch10,14,15)
100
What are the steps to the scientific method?
What are observation, hypothesis, experimentation, conclusion?
100
Facilitated diffusion differs from "regular" diffusion in that facilitated diffusion a. involves the use of a carrier protein and energy input b. involves the use of a carrier protein with no energy input c. moves a molecule from low to high concentration d. both b and c are correct
B, involves the use of a carrier protein with no energy input
100
The ___________ triggers atrial systole. a. AV node b. SA node c. atrioventicular branches d. septum
B, SA node
100
Excretion primarily rids the body of a. excess fuels b. undigested food. c. minerals d. substances that were involved in metabolism
D, substances that were involved in metabolism
100
Focusing in the eye, especially at close distance, is done mainly by the a. cornea b. iris c. retina d. lens
D, lens
200
Cholesterol is a a. steroid b. lipid c. carbohydrate d. protein e. both a and b are correct
E
200
Blood is a type of ____________ tissue. a. epithelial b. connective c. muscle d. nervous e. non of the above
B, connective
200
What component of gastric juice "activates" pepsin (from pepsinogen)? a. amylase b. HCl c. Lipase d. mucous
B, HCl
200
Which of the myofilaments uses ATP and forms cross-bridges during contraction? a. actin b. myosin c. both actin and myosin d. neither actin or myosin
B, myosin
200
Oxyhemoglobin is formed a. during cellular respiration b. during gas exchange in tissues c. during gas exchange in the lungs d. when carbon monoxide attaches to the red blood cells
C, during gas exchange in the lungs
300
Nonpolar molecules also tend to be... a. acidic b. hydrophilic c. hydrophobic d. cohesive
hydrophobic
300
What role do antioxidants play in our diet? a. they help break down fats b. they are a necessary part of proteins c. they help protect cells against damage from free radicals d. they make up part of the plasma membrane
C, they help protect cells against damage from free radicals
300
In the arterial end of capillaries a. blood pressure is higher than osmotic pressure, so water moves out. b. osmotic pressure is higher than blood pressure, so water moves in. c. oxygen diffuses into the capillary d.CO2 diffuses out of the capillary.
B, osmotic pressure is higher than blood pressure, so water moves in.
300
Tubular secretion a. refers to the reabsorption of water b. is the same thing as tubular reabsorption c. is the filtering of molecules with low concentration in the blood, such as some drugs d. is the very first step in urine formation
C, is the filtering of molecules with low concentration in the blood, such as some drugs
300
This structure controls the shape of the lens a. ciliary body b. sclera c. fovea centralis d. cornea
A, ciliary body
400
An acidic solution has... a. more H+ ions than OH- ions b. more OH- ions than H+ ions c. an eequal number of H+ and OH- ions. d. a pH of 7
A, more H+ ions than OH- ions.
400
Which of the following is true about DNA molecules? a. The bases are hydrogen bonded to one another. b. The molecule is single stranded. c. They are made of amino acids. d. The sugars and phosphates make up the "rungs" (center)portion) of the strands.
A, The bases are hydrogen bonded to one another.
400
Pancreatic juice contains a. bile b. enzymes c. sodium bicarbonate d. both b and c are correct e. all of these are correct
D, both b and c are correct
400
Which of the following is part of the non-specific defenses? a. plasma cell b. marcophage c. helper T cell d. antibody
B, macrophage
400
Sensory receptors a. are specialized to receive only certain types of stimuli b. receive stimuli from both the external and internal environments c. are found only in the skin d. are responsible for interpretation and perception of the stimuli e. both a and b are correct
E, both a and b are correct
500
Which of the following is not true about monosaccharides? a. they are monomers b. they are subunits of lipids c. glucose is a monosaccharide d. they tend to be hydrophilic
B, they are subunits of lipids
500
Some single-celled organisms have special structures that continually eliminate excess water from the cell. The presence of these organelles tells you that the environment a. is isotonic to the protozoan b. is hypotonic to the protozoan c. is hypertonic to the protozoan d. contains higher concentration of solutes than the protozoan e. none of the above
B, is hypotonic to the protozoan
500
The second sound in the heart beat (dub) is caused by a. contraction of the atria b. contraction of the ventricles c. the surge of blood through the aorta d. closing of the semilunar valves
D, closing of the semilunar valves
500
What structure contains blood with the lowest oxygen concentration? a. pulmonary artery b. pulmonary vein c. coronary artery d. left atrium
A, pulmonary artery
500
When does the refractory period occur? a. just before a nerve impulse is transmitted b. immediately after a nerve impulse is transmitted c. when neurotransmitters are released across a synapse d. when gray matter is formed during fetal development
B, immediately after a nerve impulse is transmitted