Practice Science TEAS Test

Correct Answer: A

Rationale: Abduction is the movement away from the midline of the body. This is the correct answer because abduction refers to a lateral movement away from the body's midline, such as when raising your arms sideways. Option B is incorrect because it describes flexion, which decreases the angle of a joint. Option C is incorrect as it describes extension, increasing the angle of a joint. Option D is also incorrect as it describes adduction, moving towards the body's midline.

Correct Answer: B

Rationale: The correct answer is B: Serotonin. Serotonin is associated with feelings of happiness and well-being because it helps regulate mood, emotions, and sleep. Low levels of serotonin have been linked to depression and anxiety. Dopamine (A) is associated with pleasure and reward, GABA (C) is an inhibitory neurotransmitter that helps reduce anxiety, and Acetylcholine (D) is involved in muscle movement and memory. Serotonin is the most relevant neurotransmitter for happiness and well-being due to its specific role in regulating mood and emotions.

Correct Answer: B

Rationale: Step 1: Identify the atomic number of the element based on the electron configuration (1s2 2s2 2p6 3s2) which corresponds to oxygen (O) with atomic number 8. Step 2: Determine the number of protons in the nucleus by looking at the mass number which is 14 for this atom. Step 3: Subtract the mass number from the atomic number to find the number of neutrons (14 - 8 = 6). Step 4: Protons + neutrons = mass number, so the number of protons is equal to the atomic number, which is 8. Therefore, choice B is correct. Summary: A: 14 - Incorrect, this would be the total mass number, not the number of protons. B: 6 - Correct, determined by the atomic number of the element. C: 8 - Incorrect, this is the number of protons in oxygen, not the atom described

Correct Answer: A

Rationale: The correct answer is A: Cerebrum. The cerebrum is responsible for controlling voluntary muscle movements as it houses the motor cortex, which is involved in planning, executing, and coordinating voluntary movements. It receives and processes sensory information and sends out motor commands. The cerebellum (B) mainly coordinates balance, posture, and fine motor movements, not voluntary muscle movements. The medulla oblongata (C) controls vital functions like breathing and heart rate, not voluntary muscle control. The thalamus (D) acts as a relay station for sensory information but is not directly involved in controlling voluntary muscle movements.

Correct Answer: B

Rationale: The correct answer is B: Pineal gland. The pineal gland secretes the hormone melatonin, which plays a crucial role in regulating the body's circadian rhythm. Melatonin helps control the sleep-wake cycle, making it responsible for maintaining the body's internal clock. The other choices are incorrect because the thyroid gland regulates metabolism (A), the pancreas regulates blood sugar levels (C), and the hypothalamus controls various bodily functions but is not directly responsible for maintaining the circadian rhythm (D).