#61
Nervous system
Which part of a neuron usually receives signals from other neurons?
Show answer and rationale
Answer: C. Dendrite
Dendrites are branched extensions specialized to receive incoming signals.
Read the full explanationTEAS Science · 90 questions · Page 7 of 9
90 Free TEAS Science Practice Questions with Answers
90 original TEAS 7-style science practice questions, each with a full rationale, distractor analysis, and study tips. Use these to drill the exact concepts the ATI TEAS tests — then jump into a timed quiz when you're ready.
TEAS Science Questions, Answers, and Rationales
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#62
Acid-base chemistry
A solution with a pH of 3 is how many times more acidic than a solution with a pH of 5?
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Answer: C. 100 times
Each pH unit represents a tenfold change, so a two-unit difference represents 10², or 100 times.
Read the full explanation#63
Chemical bonds
Which bond forms when atoms share pairs of electrons?
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Answer: B. Covalent bond
A covalent bond forms when atoms share one or more pairs of electrons.
Read the full explanation#64
Experimental design
Which variable is deliberately changed by a researcher?
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Answer: C. Independent variable
The independent variable is manipulated to test its effect on the measured dependent variable.
Read the full explanation#65
Scientific measurement
Which metric unit is most appropriate for the mass of a tablet?
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Answer: B. Milligram
A tablet has a small mass that is appropriately measured in milligrams.
Read the full explanation#66
Homeostasis
Sweating in response to increased body temperature is an example of what mechanism?
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Answer: B. Negative feedback
Sweating opposes the temperature increase and returns the body toward its set point, demonstrating negative feedback.
Read the full explanation#67
Muscular system
Which ion binds to troponin to initiate skeletal muscle contraction?
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Answer: C. Calcium
Calcium binding changes troponin's shape and exposes binding sites that permit actin-myosin interaction.
Read the full explanation#68
Reproductive system
In which structure does fertilization most commonly occur?
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Answer: C. Fallopian tube
Fertilization most often occurs in the ampulla of a fallopian tube before the embryo reaches the uterus.
Read the full explanation#69
DNA and RNA
Which nitrogenous base is present in RNA but not DNA?
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#70
Ecology
What term describes organisms of the same species living in one area?
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Answer: B. Population
A population consists of members of the same species occupying the same area.
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TEAS Science Practice Guide
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