the free edges of your fingernails and toenails are technically called the

ATI TEAS 7

Mometrix TEAS 7 science practice test

1. What is the technical term for the free edges of your fingernails and toenails?

A. Lunula (The lunula is the white crescent moon shape at the base of the nail)
B. Matrix (The matrix is the area under the nail where new nail cells are produced)
C. Hyponychium (This is the skin under the free edge of the nail)
D. Free edge

Correct answer: C

Rationale: The correct answer is C, hyponychium. The hyponychium is the skin under the free edge of the nail, responsible for sealing the nail to the fingertip and protecting the nail bed from bacteria and debris. The lunula (choice A) refers to the white crescent moon shape at the base of the nail. The matrix (choice B) is the area under the nail where new nail cells are produced. The free edge (choice D) is the part of the nail that extends beyond the fingertip or toe.

2. In the sentence 'The cherry tomatoes in our backyard are finally ready to be picked,' which of the following is the complete subject?

A. tomatoes
B. ready to be picked
C. The cherry tomatoes in our backyard
D. finally ready

Correct answer: C

Rationale: The complete subject in a sentence refers to the noun or pronoun that the sentence is about. In this case, the complete subject is 'The cherry tomatoes in our backyard.' It includes all the words that describe the subject and provide more specific information about it. 'Tomatoes' (Choice A) is just a part of the complete subject and not the entire subject. 'Ready to be picked' (Choice B) is a verb phrase, not the subject of the sentence. 'Finally ready' (Choice D) is an adjective phrase, not the subject of the sentence. Therefore, the correct choice is 'The cherry tomatoes in our backyard.'

3. Which of the following is a concise summary of the passage?

A. Babies focus on their caregivers' faces due to their lack of depth perception until 12 months.
B. Babies recognize their mothers' voices at birth, relying primarily on hearing initially.
C. Babies have adult-like senses except for vision, which fully develops by 12 months.
D. Babies' senses undergo significant changes in their first year of life.

Correct answer: D

Rationale: Option D is the most concise summary of the passage as it encapsulates the main idea that the passage focuses on the changes in babies' senses during their first year of life. The passage explains how babies are born with sensory abilities similar to adults but highlights the significant changes that occur during the first year, particularly in vision development. While the other options touch on specific aspects mentioned in the passage, they do not capture the overall essence of the passage, which emphasizes the dynamic and transformative nature of babies' sensory experiences in their first year.

4. A patient requires a 20% decrease in medication dosage. Their current dosage is 400 mg. What will their dosage be after the decrease?

A. 60 mg
B. 80 mg
C. 120 mg
D. 320 mg

Correct answer: B

Rationale: To calculate a 20% decrease of 400 mg, you multiply 400 mg by 0.20 to get 80 mg. Subtracting 80 mg from the current dosage of 400 mg results in a new dosage of 320 mg. Choice A is incorrect because it miscalculates the decrease. Choice C is incorrect as it represents a 20% increase instead of a decrease. Choice D is incorrect as it represents the initial dosage, not the reduced dosage.

5. Which type of waves exhibit both longitudinal and transverse motion?

A. Electromagnetic waves
B. Surface waves
C. Mechanical waves
D. Sound waves

Correct answer: B

Rationale: Surface waves exhibit both longitudinal and transverse motion. These waves travel along the boundary between two different mediums, such as water and air, causing particles to move both parallel (longitudinal) and perpendicular (transverse) to the wave's direction of travel. This unique characteristic distinguishes surface waves from other types of waves, making them the correct answer in this context. Electromagnetic waves, like light and radio waves, are purely transverse in nature, propagating through vacuum or different media through oscillating electric and magnetic fields perpendicular to the direction of wave travel. Mechanical waves, including both transverse (e.g., water waves) and longitudinal (e.g., sound waves in air) waves, do not typically exhibit both types of motion simultaneously, unlike surface waves.