ATI TEAS Science

Correct Answer: D

Rationale: Certainly! The correct answer is D because synergists assist primary movers (A), stabilize the point of origin while providing extra pull near the insertion (B), and help prevent unwanted movement at a joint (C). Synergists work together with the primary mover to facilitate smooth and efficient movement. Option A explains how synergists assist the primary movers in completing specific movements by adding force. Option B highlights the role of synergists in stabilizing the origin and providing additional force near the insertion point. Option C emphasizes that synergists help to stabilize the joint, preventing unnecessary movements and ensuring proper execution of the desired motion. Therefore, all the options (A, B, and C) collectively describe the functions of synergists, making option D the correct choice.

Correct Answer: C

Rationale: The correct answer is C, Epididymis. Sperm maturation occurs in the epididymis, a coiled tube located on the back of each testicle. Here, sperm gain motility and the ability to fertilize an egg. Seminal vesicles (A) and prostate gland (B) produce fluids that combine with sperm to form semen but do not play a role in sperm maturation. Vas deferens (D) is a tube that carries mature sperm from the epididymis to the urethra but is not the site of sperm maturation.

Correct Answer: B

Rationale: The correct answer is B: The pelvic cavity. The pelvic cavity is located in the lower part of the trunk and houses the urinary bladder, urethra, and ureters. The thoracic cavity (A) contains the heart and lungs, the abdominal cavity (C) contains the stomach, liver, and intestines, and the spinal cavity (D) houses the spinal cord. Therefore, B is the correct answer as it specifically contains the organs mentioned in the question.

Correct Answer: B

Rationale: The correct answer is B: A model. Models are representations that simplify complex phenomena, making them easier to study and understand. They often simulate natural patterns or occurrences that are challenging or impossible to directly experience. Models help researchers make predictions and test hypotheses. A: A theory is an explanation based on observed facts and supported by evidence. Theories provide frameworks to understand natural phenomena but are not direct representations of patterns that are difficult to experience. C: A law is a statement that describes a fundamental principle of nature based on repeated observations. Laws summarize patterns in nature but do not necessarily represent occurrences that are difficult to experience directly. D: An observation involves directly witnessing or perceiving a natural event. Observations are direct experiences and do not fall under the category of representing patterns that are hard to experience directly.

Correct Answer: C

Rationale: The correct answer is C (3). In a typical sensory pathway, there are three neurons involved: the primary sensory neuron, secondary sensory neuron, and tertiary sensory neuron. The primary sensory neuron transmits signals from the sensory receptor to the spinal cord or brainstem. The secondary sensory neuron carries the signal from the spinal cord or brainstem to the thalamus in the brain. Lastly, the tertiary sensory neuron carries the signal from the thalamus to the sensory cortex for processing. Therefore, a sensory pathway typically comprises three neurons to relay sensory information from the periphery to the brain. Choice A (1) is incorrect because sensory pathways involve multiple neurons for signal transmission. Choice B (2) is incorrect as it does not account for the tertiary sensory neuron involved in the pathway. Choice D (4) is incorrect because the typical sensory pathway consists of three neurons, not four.