ATI TEAS 7
Biology
1. What is the largest muscle in the human body?
- A. Gluteus maximus (buttocks)
- B. Quadriceps femoris (thighs)
- C. Erector spinae (back)
- D. Pectoralis major (chest)
Correct answer: A
Rationale: The gluteus maximus is the largest muscle in the human body, located at the back of the hip and extending from the sacrum to the femur. It is a powerful muscle that plays a crucial role in extending the hip joint, enabling walking, running, and climbing stairs.
2. The number of protons in the nucleus of an atom determines its:
- A. Mass number
- B. Atomic number
- C. Isotope
- D. Valence electron count
Correct answer: B
Rationale: The atomic number (Z) equals the number of protons in the nucleus and uniquely identifies an element. Mass number (A) includes both protons and neutrons, isotopes have different neutron numbers, and valence electrons are involved in bonding, not atomic identity.
3. Which property of a wave remains constant when it crosses a boundary between two different media?
- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Speed
Correct answer: d
Rationale: The speed of a wave remains constant when it crosses a boundary between two different media, although its direction may change.
4. Which hormone is crucial for stimulating sperm production in males?
- A. Estrogen
- B. Progesterone
- C. Testosterone
- D. Insulin
Correct answer: C
Rationale: The correct answer is C: Testosterone. Testosterone is the primary male sex hormone and is crucial for stimulating sperm production in males through the process of spermatogenesis. It is produced in the testes and plays a key role in the development and maintenance of male reproductive tissues, including the testes and prostate. Estrogen and progesterone are primarily female sex hormones, while insulin regulates blood sugar levels and metabolism. Therefore, testosterone is the hormone specifically responsible for stimulating sperm production in males.
5. Which of the following is NOT a method of sterilization?
- A. Autoclave
- B. UV light
- C. Chemical disinfectants
- D. Boiling water
Correct answer: D
Rationale: Rationale: A) Autoclave: An autoclave is a method of sterilization that uses high pressure and steam to kill microorganisms, making it an effective way to sterilize equipment and materials. B) UV light: UV light is a method of sterilization that damages the DNA of microorganisms, preventing them from reproducing and causing infections. C) Chemical disinfectants: Chemical disinfectants are used to kill or inactivate microorganisms on surfaces, but they may not always achieve sterilization, which is the complete destruction of all microorganisms. D) Boiling water: Boiling water is a method of disinfection rather than sterilization. While boiling water can kill many microorganisms, it may not be effective against all types of bacteria, viruses, and spores, making it unsuitable for achieving sterilization. Therefore, the correct answer is D) Boiling water, as it is not a method of sterilization
6. The kidneys are bean-shaped organs responsible for filtering waste products from the blood. What is the main nitrogenous waste product the kidneys eliminate?
- A. Carbon dioxide
- B. Ammonia
- C. Urea
- D. Glucose
Correct answer: C
Rationale: The correct answer is C: Urea. The kidneys filter waste products from the blood to maintain a proper balance of electrolytes and remove toxins. Urea is the main nitrogenous waste product formed from the breakdown of proteins in the liver. It is then excreted by the kidneys through urine. Carbon dioxide is a waste product of cellular respiration and is eliminated primarily through the lungs. Ammonia is a toxic compound that is converted to urea in the liver before being excreted by the kidneys. Glucose is a sugar that is normally reabsorbed by the kidneys and not excreted as waste.
Similar Questions
Access More Features
ATI TEAS Premium Plus
$149.99/ 90 days
- Actual ATI TEAS 7 Questions
- 3,000 questions with answers
- 90 days access
ATI TEAS Basic
$49/ 30 days
- 3,000 Questions with answers
- 30 days access