ATI TEAS 7 Science

Correct Answer: B

Rationale: The correct answer is B: Skeletal. Skeletal muscles are responsible for voluntary movements because they are attached to bones and are under conscious control. They enable us to move our body parts intentionally. Smooth muscles (A) are involuntary and found in internal organs. Cardiac muscles (C) are also involuntary and specific to the heart. Option D simply defines a term and is not a type of muscle.

Correct Answer: B

Rationale: Insulin is the correct answer as it is responsible for lowering blood sugar levels by promoting the uptake of glucose into cells. Glucagon raises blood sugar levels, adrenaline and cortisol are stress hormones that increase blood sugar levels. Therefore, the correct choice is B.

Correct Answer: B

Rationale: The correct answer is B: Kidneys. The kidneys are responsible for maintaining electrolyte balance through processes like reabsorption and excretion. They also filter waste from the blood to form urine. The liver primarily processes nutrients and detoxifies substances. The heart is responsible for pumping blood, not filtering waste. The lungs are involved in gas exchange, not electrolyte balance or waste filtration. Therefore, the kidneys are the correct choice for this function.

Correct Answer: B

Rationale: The correct answer is B: Identify the group number, which often indicates the typical ionic charge. Rationale: Elements in the same group on the periodic table have similar chemical properties, including their tendency to gain or lose electrons to form ions. The group number corresponds to the number of valence electrons an element has, which determines its typical ionic charge. For example, Group 1 elements tend to lose 1 electron to form a +1 ion, Group 2 elements lose 2 electrons to form a +2 ion, and so on. This pattern helps predict the charge of an ion formed by an element based on its position on the periodic table. Summary: A: Looking for elements with similar atomic weights does not directly relate to predicting the charge of an ion based on the periodic table. C: Identifying the period number does not provide information about the typical ionic charge of an element. D: Analyzing the element's position within the group is important, but the group

Correct Answer: A

Rationale: The correct answer is A: Epimysium. The epimysium is the outermost layer of connective tissue that surrounds the entire skeletal muscle. It provides protection and support to the muscle fibers within it. Perimysium (B) surrounds bundles of muscle fibers, while endomysium (C) surrounds individual muscle fibers. Myofibril (D) is not a connective tissue sheath but rather a structure within muscle fibers that contain contractile proteins. Therefore, A is the correct answer as it pertains to the sheath that surrounds the entire skeletal muscle.